Keysight U8903B - Page 47

Performance Verification for Analog Analyzer 3
Keysight U8903B Service Guide 47
3 Configure the U8903B input channels to be tested as follows:
– Connection type: Unbalanced
– Input bandwidth: 90 kHz
– Input coupling: AC
– Voltage detector type: RMS
– Trigger source: Immediate
– Multi-channel function: Crosstalk
– Sample size: 131072
4 The first test will measure the analyzer crosstalk from channel 1 (3, 5, or 7) to channel 2
(4, 6, or 8) in which the Driving channel is channel 1 (3, 5, or 7) and the Measured
channel is channel 2 (4, 6, or 8).
5 Set the U8903B analyzer Driving channel as the reference channel and the analyzer
input range of V as given in the “Test record for crosstalk verification” on page 112.
6 Set the U8903B analyzer Measured channel input range to 0.32 V.
7 Set the calibrator to produce a sine wave with amplitude of V
IN
and frequency of f
IN
as
given in the “Test record for crosstalk verification” on page 112.
8 Enable the calibrator output.
9 On the U8903B analyzer, enable both the Driving and Measured channels.
10 Record the crosstalk measurement obtained from the Measured channel in the “Test
record for crosstalk verification” on page 112.
11 Repeat step 5 to step 10 for the rest of the frequency, analyzer input range, and V
IN
combinations to complete the verification of the U8903B input channels to be tested.
12 Repeat step 4 to step 11 to measure the analyzer crosstalk from channel 2 (4, 6, or 8)
to channel 1 (3, 5, or 7) in which the Driving channel is channel 2 (4, 6, or 8) and the
Measured channel is channel 1 (3, 5, or 7).
13 Repeat step 1 to step 12 to complete the verification of the other U8903B input
channels.
14 Compare the recorded crosstalk measurement values to the specification. If the test
fails, adjustment will need to be carried out accordingly.