I would also note that management is scheduled to present at the Bank of America Merrill Lynch Global Technology Conference on June 6th in San Francisco, as well as the Stiefel Cross Sector Insight Conference on June 12th in Boston, and Credit Suisse Semiconductor Supply Chain Conference on June 14th, which is also in Boston. We hope to see many of you there.

And now, I'd like to turn the call over to Ron.

Ron Nersesian -- President and Chief Executive Officer

Thank you, Jason, and thank you all for joining us. Today I'll focus my formal comments on three key headlines for the quarter. First, revenue grew to a record $999 million, which was well ahead of our guidance. We also achieved earnings of $0.83 per share, which is $0.02 above our guidance midpoint. Second, Keysight's core revenue and orders grew double digits, and we achieved double-digit order and revenue growth in our Communications, Electronic Industrial, and Services Solutions Groups, as demand for Keysight's solutions in 5G, Automotive, and Services continued. And third, we are raising our outlook for the year.

Let's now take a deeper look into our performance for the quarter. We achieved earnings of $0.83 per share and delivered strong order growth. Orders grew 23% in total, or 10% on a core basis. Broad-based demands across our markets, geographies, and channels drove our third consecutive quarter of double-digit core order growth. Q2 revenue grew 32%, or 18% on a core basis, to reach $999 million. Core revenue grew double digits across all regions, including our emerging markets. Additionally, I'm pleased to report that the shipment disruption from the wildfires is now behind us. This was completed one quarter earlier than expected and without a single order cancellation.

During the quarter, we completed phase two of the Ixia integration. We have invested significant resources upgrading their systems and processes for long-term value creation. This included integration of all procurement, contract manufacturing, trade and logistics activities to leverage Keysight's scale. In addition, we consolidated 28 sites to drive operational alignment and cost savings, and absorbed many management and administrative functions for efficiency. This was an enormous effort, and stabilization took longer than expected, impacting ISG's Q2 results. Many of these integration issues are now resolved, and we will deliver the committed cost synergies in the current quarter.

Ixia's leadership in next-generation technologies is integral to our solutions and software strategy. Our acquisitions of both Ixia and Anite bring Keysight into the software layers of the design and test market. With our combined technology portfolios, we're able to deliver full end-to-end solutions across the total communications workflow. Our solutions roadmap for the next several years is very exciting, especially as 5G provides new ways to connect people with their devices, cars, and things.

Our Communications Solutions Group, or CSG, is making great contributions in the wireless portion of 5G, and ISG is addressing the network part of the ecosystem. We have had several significant wins for evolved packet core upgrades with major carriers. Major 5G network investments in the U.S. are expected to begin in the second half of the year as carriers introduce new services.

Moving to our markets, we continue to see increased investments in our emerging technologies and overall healthy market dynamics. Our technology leadership, solutions, and industry-focused approach to the market continues to advance our growth and footprint in key segments. Customers are increasingly looking to Keysight to solve their design challenges, and we are empowering them to bring their leading-edge innovations to market faster.

This quarter, we saw particularly strong revenue growth in our Commercial Communications end market, following Q1's record order performance. 5G-related R&D investment continues to increase across the wireless ecosystem, which includes networks, chipsets, and devices. In Q2, we achieved strong double-digit 5G order growth. This was our 10th consecutive quarter of double or triple-digit order growth for our 5G solutions, which we believe confirms our early leadership position.

As another example of our leadership, in April, we announced the industry's first 5G New Radio-ready channel emulation solution, which has already been adopted by five major communications customers. This new solution, based on technology acquired from Anite, offers state-of-the-art capability and enables customers to validate the end-to-end performance of their designs. Additionally, we delivered our first-to-market 5G millimeter-wave channel sounding solution to NTT DOCOMO, Japan's leading mobile operator.

Automotive and energy is another area where we continued to see strength in the quarter, delivering our sixth consecutive quarter of double-digit order growth. The global race to deploy hybrid and electric vehicles, connected cars, and autonomous driving capability as soon as practically possible is driving ongoing customer investments across a broad range of technologies. Investments for battery and electric drive train tests are growing in strategic importance. Our ability to differentiate solutions with the acquisition of Scienlab is proving to be a critical enabler to capturing this market opportunity.

General economic conditions in industrial electronics were strong in the quarter, despite some modest slowing in semiconductor investment growth. We saw steady order growth for our general electronics measurement end market, and improved demand in the education market in the U.S. and Europe. This market is an important avenue for building long-lasting relationships with future engineers.

In the Aerospace, Defense, and Government end market, we delivered very healthy double-digit order growth for the third consecutive quarter, and saw Q2 revenue increase by 27%, driven by continued broad-based demand worldwide.

Moving beyond our end markets, software services are key components to our solution-centric go-to-market approach. Software is becoming a larger part of our portfolio, and in the second quarter, orders for our software solutions grew double digits organically. Our new PathWave software platform, which we introduced in January, is a foundational element of our strategy to deliver software-centric solutions to our customers around the world. We have already won our first orders for PathWave Analytics and are encouraged by the many deals we see in the funnel. Additionally, Q2 revenue for our Services segment grew 15% year-over-year to reach an all-time record. Our services expansion included growth in the managed services business with the introduction of PathWave Asset Advisor. This cloud-based software has already been enabled at multiple large customers and is assisting them with proactive life cycle management of their test equipment.

PathWave is a key part of Keysight's leading-edge technology strategy under the Keysight Leadership Model, or KLM. This model encompasses our guiding principles as a company, and enables us to deliver greater value to customers, shareholders, and employees. KLM is centered around customer success and providing leading-edge technology, solutions, and insights. We believe that staying true to this mission and the core values of KLM has and will continue to drive long-term business value.

Corporate social responsibility, or CSR, is one of these core values. Demonstrating our commitment to this endeavor, we released our CSR report in May. This report details the company's environmental, social, and governance initiatives worldwide. It also includes several company impact goals to help build a better planet, strengthen communities, and foster education. While corporate social responsibility has always been a part of Keysight's DNA, these measures provide a beacon to drive our efforts, measure our progress, and support stakeholder expectations. We look forward to sharing with you the success of this effort in the quarters and years to come.

I will now turn it over to Neil to discuss our financial performance and outlook in more detail.

Neil Dougherty -- Senior Vice President and Chief Financial Officer

Thank you, Ron, and hello, everyone. We delivered an exceptional top line quarter, as we continued to execute on the strong demand we see in core areas of our business. Given the impact to the quarterly seasonality of our revenue due to the disruption from the wildfire, I will comment today on both our second quarter and first half results.

For the first half of 2018, we delivered 8% core revenue growth, a year-over-year core operating margin incremental above 40%, and 11% EPS growth overall. In addition, first half orders grew 30% in total, or 13% on a core basis, enabling us to exit Q2 in a strong backlog position. As expected, we saw a significant revenue ramp in Q2. We reported Q2 non-GAAP revenue of $999 million, which was well ahead of our guidance. This brought our revenue for the first half to $1.9 billion, up 25% year-over-year, which includes a two percentage point favorable impact from currency.

Looking at our operational results for Q2, we reported a gross margin of 60.3% and operating expenses of $399 million resulting in an operating margin of 20.4%. We reported net income of $158 million and $0.83 in earnings per share on a weighted average diluted share count of 190 million shares.

Moving to the performance of our segments, as you may recall, our Communications Solutions Group, or CSG, was the business most impacted by the wildfire disruption. Total CSG revenue for the first half was $956 million, up 11% over last year, while delivering gross margin of 61.3% and operating margin of 19.3%. In Q2, CSG delivered revenue of $536 million, up 27% year-over-year, driven by 5G-related R&D spending across the wireless ecosystem, early investment in next-generation 400-gig and PAM-4 network test, and strong 27% year-over-year growth in our Aerospace, Defense, and Government end market.

Our Electronic Industrial Solutions Group, or EISG, generated first half revenue of $458 million, up 11% from last year, gross margin of 60.3%, and operating margin of 22.7%. Q2 EISG revenue was $255 million, up 16% year-over-year, driven by automotive and energy and general electronics measurement, while revenue for our semiconductor measurement solutions was in line with Q2 of last year.

As Ron mentioned, second quarter ISG results were impacted by our extensive integration efforts. ISG reported Q2 revenue of $90 million, gross margin of 75.8%, and an 8.4% operating margin loss. We have resolved many of the integration issues, and expect ISG will deliver solid profitability in the second half. In addition, our annualized cost synergies will ramp to the committed $40 million run rate in Q3.

Lastly, Services Solutions Group, or SSG, revenue grew 11% in the first half, to reach $224 million, while delivering 40.5% gross margin and operating margin of 15.5%. Q2's record services revenue of $118 million grew 15% year-over-year and was driven by double-digit growth for calibration, remarketed solutions, and repair.

Moving to the balance sheet and cash flow, we ended our second quarter with $784 million in cash and cash equivalents. We generated $111 million in cash flow from operations in the quarter and $282 million on the half, as the significant Q1 timing-related reductions in working capital linked to the fire recovery began to balance out. In Q2, we invested $34 million in capital purchases, bringing our free cash flow for the quarter to $77 million, and $224 million for the first half, which represents 12% of revenue and 88% of adjusted net income.

As we outlined at our Analyst Day, our capital allocation priorities are to reinvest in our business to drive profitable organic growth, to de-lever following the acquisition of Ixia, and strike a balance between future M&A and return of capital. Consistent with these priorities, in Q2, we repaid the final $260 million of the $540 million pre-payable debt that was put in place to fund the Ixia acquisition, and we actively repurchased stock during the quarter under the $350 million share repurchase program we announced in March. During the quarter, we repurchased approximately 770,000 shares at an average price of approximately $52 per share for a total of $40 million.

Now turning to our outlook and guidance. We expect third quarter revenue to be in the range of $942 million to $972 million, and Q3 earnings per share to be in the range of $0.72 to $0.82, based on a weighted diluted share count of approximately 190 million shares. While we do not typically provide full-year guidance, building on our positive momentum and our strong backlog position, we now expect to deliver full-year core revenue growth in the range of 7% to 8%, which is above our prior estimate of 5% to 7%, and we continue to expect to deliver a 40% core operating margin incremental for the full year.

With that, I will now turn it back to Jason for the Q&A.

Jason Kary -- Vice President, Treasurer, and Investor Relations

Thank you, Neil. Chantelle, will you please give the instructions for the Q&A?

Questions and Answers:

Operator

Ladies and gentlemen, if you would like to ask a question, please press * followed by the number 1 on your telephone keypad. We ask that you please limit yourself to one question and one follow-up question. To withdraw your question, please press the # sign. Please hold while we compile the Q&A roster.

And the first question comes from the line of Vijay Bhagavath with Deutsche Bank. Your line is open.

Vijay Bhagavath -- Deutsche Bank -- Analyst

Yeah, hey, good afternoon. Yeah, hi. Great results. Would agree with you Ron. A question for you, Ron --

Ron Nersesian -- President and Chief Executive Officer

Thank you, Vijay.

Vijay Bhagavath -- Deutsche Bank -- Analyst

Thank you. Yeah, man. I would agree with you, good results. A question for you Ron, and then a quick one for Neil. For you, Ron, I mean, you're seeing order strength. Can you comment on visibility of these orders, the pipeline you're building up? It's very helpful for us as investors. And then for you, Neil, on the margin line, what are the puts and takes? It came in a bit weaker than expected, maybe, so I'd like to get your thoughts on the margin line. Thank you.

Ron Nersesian -- President and Chief Executive Officer

Well, first, starting off with our overall visibility, we're very encouraged on two fronts; one, by taking a look at not only the orders that we have but the funnel that we have, and then on top of that, the backlog that we have built up in the past. No one knows what's going on in the economic situation, but we do believe when you look at our growth rate that we're doing a very good job of gaining share and leading in positions such as 5G and Automotive. So that looks very good. I also will comment that with Ixia, although we had to invest a lot this past quarter to make sure that we had all the systems in place, and consolidating 28 sites and absorptions of roles, I'm very encouraged to see the funnel start that we have in the beginning of this quarter.

Neil Dougherty -- Senior Vice President and Chief Financial Officer

Yeah. With regard to the margin question, I think we were encouraged by the 20%-plus operating margin that we put up here in the second quarter, as well as the strong incremental that we have on core growth. I think if you look at the puts and takes, obviously there was a bit of an unfavorable mix shift with the relative weakness in ISG, obviously a strong gross margin business, while at the same time, we're seeing great strength in our core business. I think the other thing is, we've emphasized in the past the importance of our flexible operating model and the flexible nature of our cost structure. A core component of that is obviously the fact that 100% of our employees have a portion of their pay that fluctuates with business performance. The formula is linked to both organic growth and operating margin both of which were obviously at high levels for Keysight compared to historic averages. And so, we did see a significant increase in our variable payouts in the quarter, which was expected, and it provides an opportunity for our employees to align themselves with our investor base and share in the upside, while at the same time, providing us great protection on the downside. At the same time, we're investing to obviously continue to make sure we maintain the leadership position in core technologies around 5G and Automotive.

Vijay Bhagavath -- Deutsche Bank -- Analyst

Thank you.

Ron Nersesian -- President and Chief Executive Officer

Thank you.

Operator

And the next question comes from the line of Brandon Couillard with Jefferies. Your line is open.

Brandon Couillard -- Jefferies -- Analyst

Thanks. Good afternoon.

Ron Nersesian -- President and Chief Executive Officer

Hi, Brandon.

Brandon Couillard -- Jefferies -- Analyst

Ron, with respect to the Ixia integration issues in the second quarter, how much of those were really factored into guidance, and was that more of a revenue or operating expense impact? And any chance you could size the EPS effect relative to your guidance in the quarter? And then secondly, on Ixia, I'd be curious to hear how you're tracking in terms of the revenue synergies relative to your three-year goal of $50 million now that you're a year into the closing?

Ron Nersesian -- President and Chief Executive Officer

Sure. Well, just -- again, just to repeat, we invested significant resources, obviously, to try to bring our systems together, because our job was to integrate the businesses and get to the cost and revenue synergies sooner. And in particular, we moved Ixia on to Keysight Oracle ERP system. We went ahead and changed or integrated the forecasting processes, procurement processes. We set up customers where we've set up over 90 different customers on brand new contracts, which we had to negotiate one by one, obviously starting with the bigger customers. And we also changed our manufacturing location, where we moved contract manufacturers, and on top of that, trade and logistics processes change. So, all that took a little bit more time than we thought, but we are on track with the cost synergies. We're also on track with the revenue synergies. As a matter of fact, as I had mentioned, we're seeing a lot of technology sharing, and we saw some of that just come to fruition, for instance, with the Anite acquisition that Satish has been working on in CSG. And we're at the beginning elements of that, seeing that start to work. Also in Ixia, as we just had our Keysight technical conference, the biggest conference that we have, every two years, and we brought Ixia and the Keysight classic folks together to do that. So, we still feel very confident in the revenue synergies as well as the cost synergies, and I'll let Neil talk to the overall model.

Neil Dougherty -- Senior Vice President and Chief Financial Officer

Yeah, just relative to the guidance, and again, I would think that -- I would say that it's really a story of some puts and takes, right? On the positive side, we were expecting the shipment recovery from the fire disruption to carry into Q2 -- excuse me, into Q3. We were able to accelerate that and obviously pull those shipments into the second quarter. That, coupled with the order strength in the core, the third consecutive quarter of double-digit order growth in the core, we're obviously net positive, even relative to the guidance that we put out. On the flip side, Ixia, we had expected some softness and some slowing of the incoming order rate as a result of this significant integration effort, but the ability to ramp sales back did take longer than expected, so there was some downside there relative to what was baked into our guidance.

Ron Nersesian -- President and Chief Executive Officer

And I'll just add one more point with regards to the funnel. The funnel was the highest that it's ever been inside of Keysight for the Ixia business and it's been – it's the highest looking back seven quarters, and that's just as far as we've looked back. And April is off to a good start. So, that's what gives us the confidence in our outlook for Ixia.

Brandon Couillard -- Jefferies -- Analyst

Thank you. That's helpful. And then one more for Neil. If you could give us a sense, some ballpark parameters of what the guide implies for 3Q margins? It seems to suggest about a 30% incremental, but I suspect Ixia is somewhat of a drag on that relative to your 40% core target for the year.

Neil Dougherty -- Senior Vice President and Chief Financial Officer

Yeah, we continue to deliver a 40% core incremental into the third quarter, and we'll do so for the full year as well. Obviously, in addition to Ixia, we have the Scienlab acquisition. We also have currency, which is helping us on the revenue line, but is more or less profit neutral. And so, you need to take into account the impact of currency when figuring out those incrementals.

Brandon Couillard -- Jefferies -- Analyst

Thank you.

Ron Nersesian -- President and Chief Executive Officer

Thank you, Brandon.

Operator

And the next question comes from the line of Toshiya Hari with Goldman Sachs. Your line is open.

Toshiya Hari -- Goldman Sachs -- Analyst

Thank you so much, and congrats on the solid results. You guys raised guidance for the full year. I was hoping you could provide a little bit more color in terms of where you're seeing the upside? Is it broad-based across the entire company, or are you seeing the upside kind of focused in one or two specific areas?

Ron Nersesian -- President and Chief Executive Officer

Yeah, I'll turn this over to Mark Wallace, our leader of sales. But as you can see from our results, we saw strong double-digit growth in three of our four main businesses. So, that makes us feel very good. Now, obviously Aerospace/Defense was very solid as well as commercial communications in the Communications Solutions Group, as well as looking at total EISG and looking at total SSG. But Mark, why don't you give a little more commentary, please.

Mark Wallace -- Senior Vice President of Worldwide Sales

Sure. Yeah, it really follows with what Ron just said. Strong order results across all geographies and segments, as we already know, in the third quarter in a row of double-digit core order growth. I see continued strengths in 5G across both wireless and networks, especially picking up in the second half, with some of the deployment from the network operators that have already been announced. Aerospace/Defense is seasonally stronger for us in the second half, and with the U.S. budget being signed, we're expecting to start seeing some of that funding flowing probably toward the fourth quarter for us. And then, our growth strategy around Automotive and Energy continues to yield great results six quarters in a row of double-digit order growth. As Ron mentioned in his opening comments, the Scienlab acquisition is really an important and strategic one for us as we move into other parts of the business, including the OEMs. So, it really is broad-based across all regions, and it really is aligned with the focus we've put around our growth initiatives.

Toshiya Hari -- Goldman Sachs -- Analyst

Great. And then as a follow-up, Ron, I think this one's for you. Obviously, the political landscape as it relates to the U.S.-China relationship continues to be unstable, to say the least. Given your involvement in leading-edge technology, you know, 5G and other forms of wireless technology, could that have implications for your business in China, or should we not be concerned? Thank you.

Ron Nersesian -- President and Chief Executive Officer

Yeah, Toshiya, that's a great question. We have a very broad-based business inside of China. So, there are Aerospace/Defense customers but also commercial communications customers, automotive, semiconductor, etc. So, we have a pretty broad-based business, and that makes a really nice structure. We did see, as we had reported, double-digit growth in China this past quarter. I cannot speak for the political landscape on what will happen there, but it is broad-based, and I believe that they need us as much as we need them. So, we'll hope that that works out fine on the political side, but it is a pretty broad impact that we have all across segments.

Mark Wallace -- Senior Vice President of Worldwide Sales

And this is Mark. Just to add one thing, is that we're engaged deeply with both the Chinese customers as well as the multinational customers in China, and these are industry leaders. And we are -- and as Ron mentioned, it's not just within one segment, but multiple segments. And the semiconductor growth that's been investing in China over the last couple of years and will continue for the next three or four years represents a lot of opportunity for us. So, I think that diversity is a very important part of the equation as well.

Ron Nersesian -- President and Chief Executive Officer

And for most customers, a lot of times what -- the way that some of these potential issues could play themselves out is, it takes a look at where the products are shipped from. And most of our products ship from overseas, from Penang, Malaysia. So, that may or may not have a more subtle impact to any type of sanctions that do come up.

Toshiya Hari -- Goldman Sachs -- Analyst

Got it. Thank you so much.

Ron Nersesian -- President and Chief Executive Officer

Thank you, Toshiya.

Operator

The next question comes from the line of Jim Suva with Citi. Your line is open.

Joshua Kehoe -- Citi -- Analyst

Hi. This is Josh Kehoe on for Jim. Thanks for taking our questions. Can you provide more color on the progress of your Auto and Energy business, and when you think it could possibly surpass your semiconductor test business as a percentage of revenue, especially considering that you noted some weakness in semiconductor tests for the quarter? Thanks.

Mark Wallace -- Senior Vice President of Worldwide Sales

Sure, Jim. This is Mark. So, as I mentioned earlier, our growth initiative is really well on track, six consecutive quarters of double-digit order growth. And it's really being fueled by the investments being made and really the race for autonomous driving, electric hybrid vehicles, and connected cars. What we have announced too, we mentioned this at the Investor Day as well as over the last couple of quarters calls, that we're establishing automotive solution centers in several regions to help further strengthen our customer connectivity in our solution development. The one that was opened in Detroit is up and running, and it's doing very well. We plan to open another center in Shanghai, China soon, and we have plans for another one in Japan as well. So, this is just a further articulation of the commitment and strategy around Automotive.

And as I mentioned before, the acquisition of Scienlab has really allowed us to expand our solutions into the battery and charging infrastructure space. We've won some business already in Q2, and we expect to see that continue, especially as the OEMs invest more heavily in R&D, along with the overall supply chain. So, I think in general, we're seeing the continued strength. As far as the semiconductor, it really serves all industries. So, it's hard to do a compare there, but it is something we are continuing to be successful in. And as a reminder, we have a pretty diverse portfolio of solutions into semiconductor from nano-positioning tools, to wafer test tools, to general test and measurement products, as well as services. So, that's another key area. And again, it feeds into all of the other industries that we service as well.

Ron Nersesian -- President and Chief Executive Officer

Thank you, Josh.

Operator

And your next question comes from the line of Joseph Wolf with Barclays. Your line is open.

Joseph Wolf -- Barclays -- Analyst

Thank you. A couple of questions. I guess you mentioned -- you touched on this briefly, but I was hoping we could get a better differentiation or distinction, if there is one to be made, between the acceleration and the strength in the 5G cycle, and then the optical cycle, which I assume is somewhat adjacent, but is also -- can be different given metro builds, and timing, and other builds going on in China. So, I'm wondering if we can actually look at the optical communications as an area of double-digit growth separate to the 5G, or whether you think about them in a combined way, and how we could think about that on a product level across the different groups?

Satish Dhanasekaran -- President, Communications Solutions Group

Yeah, this is Satish here. I'll take this one, Joe. Very insightful, in that 5G is not just a wireless technology. It's a new way of thinking about the end-to-end experience, which is the way we think about how our solutions are offered. So obviously, there's the frontend piece, the wireless piece, and 5G, with the standards that you're referencing, and that has to work together. And therefore, having 400G type of technologies roll out is crucial, and we see that playing out both in data centers and in telecom markets. So, specific to our business, we've invested early in 5G a few years ago, made strategic acquisitions like Anite, and it takes a couple of years to start to roll out those platforms. Now these platforms are with customers, and you're starting to see the success -- ten straight quarters of double or triple-digit growth in our 5G business.

With 400G, we have obviously been well positioned with 100G. You probably, if you've followed us or heard us on earnings calls, talk about the ramp that occurred in 2016 through mid-2017, and since then, 100G has really tapered off a little bit as people have started to consume the capacity that's in place. And we start to now see a buildup in 400G even this quarter, with strong orders for 400G in R&D and some early orders for 400G in manufacturing. So, we see both these things play out concurrently and synergistically, and this is why we manage our portfolio with focusing on all these technology evolutions. That gives us a pretty good diversity as things play out.

Ron Nersesian -- President and Chief Executive Officer

And that's one of the great things that we really appreciate about Keysight, is that we play on the wireless side and the wired side. We play on the physical side, whether it's on copper or fiber. We play on the hardware side, and the software layers up to the top. So, we're really looking at this overall communications ecosystem and other ecosystems in our markets, and that provides diversity for our business and provides more earnings, let's just say stability, for our investors.

Joseph Wolf -- Barclays -- Analyst

Thank you. That was actually very helpful. I guess just another question. When you think about the order pattern in the Aerospace and Defense, and I know that this has come up on a couple of last calls, just in terms of the order strength and I guess pent-up demand or the actual procurement cycles, at least our defense analyst is thinking about this as being an upside in terms of a pent-up spending cycle and things coming in ahead of expectations. Is that part -- or how significant is that or how conservative do you think we should be as we think about that potential given the last three quarters -- I guess the strength over the last couple of quarters?

Mark Wallace -- Senior Vice President of Worldwide Sales

Sure, I'll take that. This is Mark. So, I think the budget being signed back in April has alleviated a bit of that pent-up demand. We had a strong quarter. Again, the third quarter in a row of double-digit order growth, and that was before any of the funding really started to flow from this year's budget. That takes time to work through the appropriation process. So, a lot of that was the pent-up demand. But really I think what I look at is the underlying driver for this is the investments that are being made around the world and especially in the U.S. to upgrade technology for information warfare, and as well as the continuing shift of the prime contractors to be outsourcing more of this work, right?

So, yeah, the strong demand from the U.S. government and contractors as the budget moves its way through that process, we'll start to see some of that upside occur again toward the end of the U.S. government's fiscal year. And again, the encouraging thing is we see strengths outside the U.S. as well, again, around the same things -- investments in solutions for EW, information warfare, radar, and etc. So, I would say it's more about that than pent-up demand, which I think has more sustainability to it over a longer period of time.

Joseph Wolf -- Barclays -- Analyst

Excellent. Thank you.

Operator

And the next question comes from the line of Rob Mason with Baird. Your line is open.

Rob Mason -- Baird -- Analyst

Yes, good afternoon. I wanted to know if you could speak just briefly on Ixia. It sounds like you did account for perhaps some revenue disruption, but the revenue there did come in lighter than we were expecting. I was just curious, as you think about the second half guidance that you updated, do you assume any revenue catch-up with Ixia in that guidance?

Neil Dougherty -- Senior Vice President and Chief Financial Officer

Yeah. So, you're correct. We had obviously taken into account the impact of the integration, investments, and effort that we were going on. The ramp back to volume took longer than expected. And so, we did have lower revenues here in the second quarter than was baked into our original guide. As we look forward, as Ron has already mentioned, we have a very strong funnel entering the quarter. We have -- many of the issues that we ran into are now behind us. The business is ramping back toward normal. I would say we're cautiously optimistic as we look forward to Q3 that things will return to more normal kinds of levels. I think as you look at Q3 or at kind of the gap in revenue in Q2, some of that will be lost, and there's some potential that some of that will be recovered.

Rob Mason -- Baird -- Analyst

Okay. Thanks for that. And then just with respect to your commentary around 5G, some deployments perhaps starting in the second half of the year. As we think about moving from some of the R&D products now toward deployments, could you just speak to how you think the business -- how we should think about that business just in terms of margins, how we should think about it in terms of maybe revenue recognition cycles, whether there's any difference there, just as we start to make a transition? I realize it's still early, but you're starting to see some transition.

Satish Dhanasekaran -- President, Communications Solutions Group

Yeah, good question. I think, as you have pointed out about -- according to GSA, about 14 operators in 11 countries have made some type of announcements around 5G deployments starting in 2018. So, whether you believe it's late 2018 or early 2019, that's a pretty significant number. When you compound that with 48 operators in 33 countries that have announced plans for 5G, it's pretty clear that this industry is accelerating this technology. Again, a trend that we saw and planned for quite some time ago. Our focus is on higher value-added parts of the market, early R&D. And our contributions are increasingly for software ,which should give us a better margin profile. And Neil will probably pick up on that. But at the end of the day, for us, it's about offering our customers an advantage, and we do that by offering end-to-end solutions. We provide a single stop shop now with our ability to have not only the physical layer tools, but also go higher on the software stack. And with Ixia, we now have the total solution for the entire ecosystem, and we feel good about where we are in that 5G journey.

In terms of the life cycle, you're correct that we're still in the early phases. Our customers are still in the first vintage of products that are used in trials. Next will be continued R&D investments for the next couple of years in order for them to satisfy the need of the operators that I just referenced.

Ron Nersesian -- President and Chief Executive Officer

I'll just add a couple more points. With regard to our margins, we are committed to the 40% incremental. And although we could go higher than that, we want to make sure that we stay on the leading edge. That is the secret and the key to this business, and we're gonna continue to invest while providing the shareholders with the type of returns that we have discussed. There's no doubt that we more software is being entered into the mix of our products with higher gross margins, but then again, we have services which are also ramping, and we've had a record quarter for services, which have lower than average gross margins. But overall, we're focused on the customers, making them successful, providing end-to-end solutions, a little bit more software in services, and delivering a 40% incremental. Thank you, Rob.

Operator

And the next question comes from the line of Farhan Ahmad with Credit Suisse. Your line is open.

Farhan Ahmad -- Credit Suisse -- Analyst

Hi. Thanks for taking my question, and congrats on the great set of results. My first question is regarding the strong growth that you are seeing this year. The growth, if I look at the first two quarters, is above 10% in the core business, excluding Ixia, which is far above what you have guided in your long-term growth in the business to be. So, in regards to cyclicality, is there a concern here that we might be getting overheated, and as we look into 2019, the growth may decelerate meaningfully from what might be tough compares?

Mark Wallace -- Senior Vice President of Worldwide Sales

So, this is Mark. No, there's really -- there's no indication that we're seeing any sort of cycle. As Ron already mentioned, our funnel for our Ixia products is very strong. The same is true on the core products as well. So, we're continuing to build momentum. And the exciting thing is now we're seeing growth in other parts of our business as well, including software and services. We introduced PathWave, and we've gotten our first order for PathWave Analytics. That's a brand new platform. That didn't exist before Q2, right? And so, this is going into a new set of customers with contract manufacturers and ODMs, and we're gonna continue to build on that going forward. So, I think the investment cycles that we're seeing with the early R&D and 5G with the early stages of what's happening with Automotive, as well as other technologies that are feeding into the connectivity across the world, are gonna continue to give us opportunities beyond FY18.

Farhan Ahmad -- Credit Suisse -- Analyst

Got it. And then, specific to the services group, can you talk about what specifically is driving the strength there? Because I would imagine that that portion of the business is somewhat less variable. And we are seeing more than 10% growth in the first half of this year. So, can you talk about why are we seeing the acceleration in the services in such a meaningful way?

Mark Wallace -- Senior Vice President of Worldwide Sales

Sure. I'll talk to about a few parts of it. Again, it was a record high quarter for us with services. And then, if you look at the components of our services business, really all of them were up at the same time. Our calibration revenues were up. A lot of that growth was driven from our Liberty Calibration Labs. That was part of an acquisition that we had last year. So, that's doing very well. Repair was up. Our professional services were up. And a lot of the professional services are tied to our equipment sales as we provide start-up assistance for more and more of our customers as they deploy more complex solutions. So, there's a close tie there.

And as has been the case for some time, our remarketed solutions continue to be very strong. We have the right mix of inventory, and we're seeing continued demand from some of the same end user segments, such as wireless, for our remarketed solutions. The last thing I'll mention here, too, which is the strength that we're seeing today from the solutions and product sales should help us fuel services sales in the next year to two years. So, that's also an encouraging part of having services growth now and then going into the future.

Ron Nersesian -- President and Chief Executive Officer

And obviously, as we see longer-term contracts, this will help us to provide a greater annuity to provide more dampening on the bottom line.

Farhan Ahmad -- Credit Suisse -- Analyst

Got it. Thank you. That's all I had.

Ron Nersesian -- President and Chief Executive Officer

Thank you, Farhan.

Operator

Thank you. That concludes our question and answer session for today. I would now like to turn the conference back over to Jason Kary for any closing comments.

Jason Kary -- Vice President, Treasurer, and Investor Relations

Thank you, Chantelle, and thank you all for joining us today. We look forward to seeing many of you at the upcoming conferences, and have a great day.

Operator

This concludes our conference call. You may now disconnect.

Duration: 47 minutes

Call participants:

Jason Kary -- Vice President, Treasurer, and Investor Relations

Ron Nersesian -- President and Chief Executive Officer

Neil Dougherty -- Senior Vice President and Chief Financial Officer

Mark Wallace -- Senior Vice President of Worldwide Sales

Satish Dhanasekaran -- President, Communications Solutions Group

Vijay Bhagavath -- Deutsche Bank -- Analyst

Ken Talanian -- Evercore ISI -- Analyst

Brandon Couillard -- Jefferies -- Analyst

Toshiya Hari -- Goldman Sachs -- Analyst

Joshua Kehoe -- Citi -- Analyst

Joseph Wolf -- Barclays -- Analyst

Rob Mason -- Baird -- Analyst

Farhan Ahmad -- Credit Suisse -- Analyst

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