Keysight U8903B, Service Manual

Page: 49 / 165

Performance Verification for Analog Analyzer 3
Keysight U8903B Service Guide 49
– Function 2: VAC
– Voltage detector type: RMS
– Trigger source: Immediate
– Display view: Graph view
– Graph analysis mode: Magnitude
– FFT windowing: Blackman Harris
– Sample size: 65536
– Graph X-axis spacing: Linear
– Graph trace 1 (3, 5, or 7) State: ON
– Graph trace 2 (4, 6, or 8) State: ON
– Graph Y-axis top limit: -50 dBV
– Graph Y-axis bottom limit: -160 dBV
– Graph marker threshold state: ON
– Graph marker threshold level: -130 dBV
5 On the U8903B analyzer, set the input range as given in the “ Test record for CMRR
verification ” on page 113 .
6 On the calibrator, set the amplitude to 1 V and the frequency of f
IN
as given in the “ Test
record for CMRR verification ” on page 113 .
7 On the U8903B graph analysis mode, set the graph X-axis left and right edge as given
in the “
Test record for CMRR verification ” on page 113 .
8 On the U8903B graph analysis mode, set the graph Marker 1 state to ON and assign it
to Trace 1 (3, 5, or 7). Set the graph Marker 2 state to ON and assign it to Trace 2 (4, 6,
or 8).
9 Enable the calibrator output.
10 Using the graph Marker 1 search function, place Marker 1 at the highest amplitude
acquired from the graph measurement.
11 Record the Marker 1’s X-value measurement as F
CMRR
, multiply Marker 1’s Y-value
measurement with –1 and record as CMRR on the U8903B in the “ Test record for
CMRR verification ” on page 113 .
12 Repeat step 10 to step 11 for the Marker 2 measurement.
13 Repeat step 6 to step 12 for the rest of the frequency of f
IN
.
14 Repeat step 5 to step 13 for the rest of the U8903B analyzer input range.
15 Repeat step 1 to step 14 to complete the verification of the other U8903B input
channels.