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integrate these new revolutionary devices into what is a totally new generation of product. However there have been rewards. Technologically we have released our new RTETM technology. This simple trademark belies the innovation behind the only currently available high end 12G capable real-time physical layer eye pattern analyser providing accurate SMPTE compliant measurements of eye amplitude rise time, fall time, overshoot, undershoot, timing and alignment jitter. The ‘holy grail’ of effective UHDTV SDI physical layer analysis is bandwidth. Without appropriate bandwidth you’re in the dark. With over 30 GHz (5th harmonic of the 6GHz fundamental for 12G-SDI) analogue bandwidth on its front end, the Qx can deal with the demands of qualifying 12G interfaces accurately. More bandwidth than any other currently available Broadcast T&M manufacturer. Subtleties of PCB layout and SDI driver design can thus be explored with the Qx eye pattern display. In addition, the latest crop of 12G-SDI chipsets have a new parameter to be adjusted: pre-emphasis. This typically boosts the high frequency energy of SDI outputs, adjustment of this control can only be understood in combination with an accurate eye diagram coupled with overshoot and undershoot measurement. Noise floors are required to be much lower in a 12G-SDI world for accurate meaningful measurements to be taken. The PHABRIX Qx technology has previously unheard of low noise figures within its oscillators and measurement circuits. Use of both the SDI generation and physical layer analyser features simultaneously in the Qx is not a problem. With the Advanced Jitter Generation and Analysis option (Q1/2016) SDI receiver performance can be thoroughly tested by the inclusion of output signal amplitude control exceeding the SMPTE specification of 800mV +/-10%. In addition comprehensive jitter insertion is provided along with pre-emphasis control affecting rise/fall times. The inclusion of jitter FFT instrumentation and a packaged solution to the automated measurement of both jitter tolerance and jitter transfer function will ensure that future SDI interfaces will be thoroughly tested in an automated environment with Qx technology. Current cable length performance in the lab is up to 75m on standard Belden 1694A with 12G BNC connectors. With more expensive cable types we are achieving 100m. At IBC this year we had a number of manufacturers wishing to use our RTETM technology to test their new products. The exercise was an interesting one and we undertook two separate tests qualified in comparison with two different high end oscilloscopes. The results presented in Figure 1 are from a manufacturer’s distribution amplifier which clearly suffers from a poor cable driver layout. Luckily the manufacturer was able to catch this one in time! Figure 1: Example of poor cable driver Agilent DSA 91304A 12Gbps response Phabrix Qx 12Gbps response Figure 2: EYE with overshoot and undershoot Tektronix 73304Dx 12Gbps response Phabrix Qx 12Gbps response Figure 2 represents a second test undertaken with a manufacturer wishing to control pre-emphasis. As can be seen from the traces there is considerable overshoot and undershoot here which will again require layout changes to reduce the high frequency response of the SDI output circuitry. There is nothing new here, if you have anything from £50,000 upwards to spend on a high end oscilloscope then you will see the same technology in action – but who has that kind of money available these days? That’s where the Qx comes in offering the same real-time response as commercially available 30GHz oscilloscopes in addition to a whole host of other UHD specific features for a small fraction of the price. With 4 separate 12 Gbps capable multi-rate inputs and outputs supporting payloads up to 48Gbps the Qx is well positioned to provide comprehensive UHDTV1/4k and UHDTV2/8k generation and analysis for all three phases of UHD development. The first batch of Qx units are available this month very much focussed on tools for manufacturing. As we progress through 2016 a host of more advanced instrumentation addressing more general Broadcast related applications will be released. Running up to NAB2016 PHABRIX will contribute a monthly article describing the challenges of T&M for UHDTV. KITPLUS - THE TV-BAY MAGAZINE: ISSUE 107 NOVEMBER 2015 | 65