Performance Verification for Digital Generator and Digital Analyzer
4
Keysight U8903B Service Guide
75
– SINE waveform amplitude: 1 FFS
– Digital output state: ON
4
Set the U8903B calibration digital output mode to BCOM mode for AES/SPDIF.
5
Set the digital output sampling rate F
SR
as given in “
Test record for balanced output
sampling rate accuracy verification
.
6
Set the frequency counter to measure the frequency of the output signal on Channel 1
and 2 and record the measurement as F
measure1
and F
measure2
respectively.
7
Compute the sampling rate error using the following equation.
Channel 1:
Δ
F
error1
ppm = [F
measure1
– (F
SR
×
64)] / (F
SR
×
64)
×
1000000
Channel 2:
Δ
F
error2
ppm = [F
measure2
– (F
SR
×
64)] / (F
SR
×
64)
×
1000000
8
for the rest of the F
SR
as given in “
output sampling rate accuracy verification
of the different output sampling rates.
9
Set the calibration digital output mode to back to NORM mode for AES/SPDIF.
Содержание U8903B
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