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Performance Verification
4–46
AM700 Audio Measurement Set Service Manual
a. Do the checks for 120 Hz LF Rej at a jitter amplitude of 0.2 UI first
from 500 Hz to 30 kHz; then make the 1200 Hz Lf Rej check at 30 kHz
(1200 Hz LF Rej is only checked at 30 kHz).
b. Set the jitter amplitude to 0.65 UI and make the 1200 Hz LF Rej check;
then switch the LF Rej to 120 Hz to make the check from 30 kHz down
to 500 Hz jitter frequency.
Table 4–11: Test AM700 jitter measurement accuracy
Test AM jitter frequency
Test settings
Measurement
accuracy range
500 Hz 2 kHz 5 kHz 30 kHz
Test AM Jitter Ampl = 0.2 UI
DUT LF Rej: 120 Hz 0.17 UI to 0.32 UI
LF Rej 1200 Hz 0.17 UI to 0.32 UI Not checked Not checked Not checked
Test AM Jitter Ampl = 0.65 UI
DUT LF Rej = 120 Hz 0.6 UI to 0.7 UI
LF Rej = 1200 Hz 0.6 UI to 0.7 UI Not checked Not checked Not checked
1. Set the DUT as follows:
a. Touch the Eye Diagram soft key (Icon).
Press Configure
Touch Input Selection
Select FP XLR
b. Touch the Digital Audio soft key.
Set Sample rate = 48 kHz
c. Touch the Interface Timing soft key.
Set Mode = From Audio
Set Offset = 0
d. Touch the Eye/Jitter Detection soft key.
Select 120 Hz
2. Connect the DUT as follows:
DUT AES REF OUT to DUT Digital In
3. Check that the peak-to-peak jitter is 0.03 UIp-p max.
Check Eye Diagram
Residual Jitter