03 | Keysight | M8195A 65 GSa/s Arbitrary Waveform Generator and M8197A Multi-Channel Synchronization Module - Data Sheet
The M8195A uses digital pre-distortion techniques for frequency- and phase-response
compensation of the AWG output and any external circuits. These are required in order
to achieve a clean signal at the device under test.
Distortions generated by cables, amplifiers, etc. can also be compensated by embedding
/de-embedding the S-parameters of the respective circuits or by performing an in-situ
calibration using Keysight 81195A Optical Modulation Generator software.
In conjunction with the 81195A Optical Modulation Generator software clean signals and
signals stressed with impairment patterns can be generated both offline on a PC or in
real-time using the hardware DSP block, which allows the parameters of the waveform
(e.g., the pulse shaping filter coefficients) and impairment generation to be adjusted at
Figure 2. Optical Modulation Generator Software
run-time without downloading a new waveform.
Multi-level/multi-channel digital signals
Increasing the data throughput on digital interfaces has traditionally been accomplished
by increasing the data rate or by increasing the number of parallel signals. However, at
a certain point, it is more cost-effective to consider multi-level signaling techniques.
Examples are high-speed backplane connections using PAM4 or PAM8, and also
technologies in the mobile application space.
The M8195A is ideally suited to address those multi-level/multi-channel interfaces using
any standard or custom data format. The flexibility of the waveform generation at highest
speeds, combined with excellent intrinsic jitter performance makes the M8195A truly a
future-proof instrument – independent of the direction technology is moving.
Figure 3. 4 PAM4 signal at 28 GBaud (= 56 Gbit/s).
At data rates of multiple Gb/s, the effect of cables, board traces, connectors etc. have
to be taken into account in order to generate the desired signal at the test point of
the device under test. The M8195A incorporates digital pre-distortion techniques for
frequency- and phase response compensation of the AWG output and any external circuit
to generate the desired signal at the device under test. Channels can be embedded/
de-embedded if the S-parameters of the respective circuits are provided.
With up to 4 differential output channels per 1-slot AXIe module and the ability to
synchronize multiple modules, the M8195A is well-suited to stimulate multi-lane
high-speed interfaces in a very economic fashion.
Figure 4. 32 Gb/s PRBS 211-1 showing 138 fs RJrms
.
With the integration of the M8195A AWG into the M8000 Series of BER test solutions,
Keysight allows you to address your high-speed digital receiver test needs with the
M8070A software platform and choose the BERT or AWG that best meets your needs.
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