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Performance Verification
AM700 Audio Measurement Set Service Manual
4–43
d. Set the Clock Phase Offset to the following values:
0, 0.5 UI, –0.5 UI, 63.5 UI, and –64 UI
2. Check that the Phase Diff. on the test AM700 reads the same as the values in
step 1, part d ±1 UI.
NOTE. 64 UI = –64 UI just as 180° = –180°)
1. Connect the test AM700 as follows:
Test AM700 Digital Out to DUT Digital In
2. Set the AM700 as follows:
Touch Jitter Generation soft key
Touch Generate Jittered Sine soft key
Set Jitter Ampl = 10 UI
Set Jitter Freq = 50 Hz
3. Setup controls for DUT as follows:
Press Configure button
Touch Input Selection soft key
Select FP XLR
Press Clear Menu button
Touch Icon Jitter Spectrum
Touch Eye/Jitter Detection soft key
Select 120 Hz
Select Gain = x1
Press Configure button
Touch Input Selection soft key
Select FP XLR
Press and hold Average button
Set Avg. Count = 8
Release Average button
Press Average button on
4. Zoom in and use the cursor to measure the spectrum at the generated
frequency (47 Hz).
a. Check for a reading in the range from 18 to 22 dBUI.
b. Repeat the measurements as indicated in Table 4–9.
Check Phase Jitter (Jitter
spectrum flatness)