Keysight 8990B Service Manual page 49

14 Press Clear Display and record the Vrms reading (V
15 Calculate the reference gain using the following equation, and record the value
16 Set the signal generator to output a 1 GHz signal, which is the maximum
17 Set the horizontal scale to 2 ns/div.
18 Set the channel frequency of the power meter to 1 GHz.
19 Measure the input power at video input channel 2 of the 8990B, and convert
20 Record the calculated RMS voltage in
21 Press Clear Display and record the Vrms reading (V
22 Calculate the gain of the maximum analog bandwidth using the following
23 Repeat
24 Repeat
25 If the maximum analog bandwidth gain is less than –3.0 dB, refer to
Keysight 8990B Service Guide
For all 8990B readings in this procedure, use the mean value
NOTE
in the Results area at the bottom of the screen.
in Table 1-7.
Gain 50 MHz = [
bandwidth of the 8990B.
the value to rms voltage using the following equation:
V in@max freq = P meas
equation, and record the value in
Gain Max freq =
step 8 to step 22
step 8 to step 23
"Adjustments" on page 51.
Performance Verification and Adjustments
⁄
( V out@50 MHz V in@50 MHz
× Ω
50
Table 1-7
Table 1-7
⁄
V out@max freq V in@max freq
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gain 50 MHz
for the rest of the vertical scale setting in
for video input channel 3.
).
out@50 MHz
) ]
(V ).
in@max freq
).
out@max freq
Table
1
1-7.
49