Keysight U8903B - Page 49

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.