Verifying The 10 Mhz Reference Input - Keysight N9000A Service Manual

Digital IF Troubleshooting
A3 Digital I.F. Troubleshooting
12. The analyzer should read 22.5 MHz at −25 dBm ± 4 dB as shown in
Figure 5-2 A3 Digital I.F. Input

Verifying the 10 MHz Reference Input

1. Perform an instrument shut down.
2. Remove the cover of the N9000A Signal Analyzer. Refer to
3. Turn the instrument over so that the bottom is facing up.
4. Turn on the N9000A Signal Analyzer and wait for the instrument to complete
5. Press
6. Press
7. Verify the 50 MHz signal is at −25 dBm by pressing
8. To continue verifying press
If the analyzer is not in 10 dB of input attenuation press
NOTE
10 dB
142
If the 22.5 MHz signal is not measuring the correct power level, see
Troubleshooting" on page 127
"Assembly Replacement Procedures," on page 225
the boot up process.
,
System Alignments
,
Input/Output RF calibrator
, on the analyzer. The maker readout should be 50 MHz at
MHz Peak Search
−25 dBm ± 3 dBm. If this reference signal is measuring incorrectly, see
4 , "RF Section Troubleshooting," on page 125
the N9000A is set to 10 dB. (Look near the top of the display near the center
and verify Atten: 10 dB)
.
in this service guide.
, , .
Auto Align Off
, .
50 MHz
in this service guide.
, . Verify the input attenuator on
SPAN Zero Span
Figure 5-2.
"RF
Chapter 13,
in this service guide.
, ,
FREQ 50 MHz SPAN
Chapter
, ,
AMPTD Attenuation
Chapter 5
,
1