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Performance Verification
4–38
AM700 Audio Measurement Set Service Manual
1. Connect the test equipment as follows:
DUT Digital Out to the test AM700 Digital In.
DUT BNC OUT to DUT BNC IN.
Test AM700 Digital Out to DUT AES REF IN.
2. Set DUT:
Input = RP BNC; Mode = From Ref.
3. Set the test AM700:
Press Jitter Generation soft key
Select Generate Jitter Sine soft key
Touch Jitter Ampl
Set Jitter Ampl = 0.12 UIp-p
Press Jitter Freq
Set Jitter Freq = 30 kHz
4. Increase the test AM700 Jitter Ampl in steps of 0.01 UI until the test AM700
Eye Diagram looses lock. Check that Jitter Ampl is at least 0.17 UI.
(spec is 0.12, typical is 0.3 UI).
1. Connect DUT Digital Out to a dual channel oscilloscope through the special
adapter cable shown in Figure 4–18.
1
2
3
110W
BNC Male
XLR Female
Dual BNC to 110 W XLR female
Cable used is insulated coaxial cable
Figure 4–18: Dual BNC to 110 W XLR adapter cable
2. Connect the AES REF OUT of the DUT to the CH 3 (or trigger input)
through a 110 W impedance transformer; a 10X, 75 W attenuator; and 75 W
BNC feed through termination.
3. Press Interface Timing soft key.
Set Mode = From Audio
Set Clock Phase Offset to 0.00 UI (Unit Interval)
Check High Frequency
Jitter Tolerance
Static Phase Difference