Tektronix RSA3303A Service Manual page 209

From page 6- - 74
Modify the signal generator
controls as follows:
Frequency: 100 MHz
Level: - - 50 dBm
Change the reference level from
- - 20 to - - 42 dBm in one dB step
on the analyzer.
Is
the spectrum
displayed with correct
amplitude?
No
Replace RF5 module.
Modify the signal generator
controls as follows:
Frequency: 100 MHz
Level: 0 dBm
Change the reference level from
+30 to +10 dBm in one dB step
on the analyzer.
Is
the spectrum
displayed with correct
amplitude?
No
Replace the step attenuator 1.
Figure 6- 35: Troubleshooting procedure 3 — Signal path (Cont.)
RSA3303A & RSA3308A Service Manual
Perform the gain calibration
(Refer to page 5- - 16).
Yes
Does the
display report
any errors?
Unplug the coaxial cable W119 from
J302 on the A100 Interconnection
board (See Figure 6- - 38/6- - 39).
Using another spectrum analyzer,
measure the output at the connector.
the spectrum
measured as follows?
Frequency: 50 MHz ±10 Hz
Amplitude: - - 30 dBm
±3 dB
Does
the output level
increase to - - 18 dBm ±2 dB
Yes
transiently when pressing the
Calibrate Gain
side key?
Replace
Step attenuator 1 or
A100 Interconnection board.
Modify the analyzer controls
as follows:
Center frequency: 3.5 GHz
Span: 1 MHz
Reference level: 0 dBm
No
Yes
Is
Unplug the coaxial cable W13 from
No J301 on the A100 Interconnection
board (See Figure 6- - 38/6- - 39).
Using another spectrum analyzer,
measure the output at the connector.
Yes
No
Yes
Replace A100 Interconnection board.
RSA3303A
RSA3308A
RF2 band check
(RSA3308A only)
Modify the signal generator
controls as follows:
Frequency: 3.5 GHz
Level: - - 10 dBm
Is
the spectrum
Yes
displayed with correct
frequency and
amplitude?
No
Is
the spectrum
measured as follows?
Frequency: 50 MHz ±10 Hz
Amplitude: - - 30 dBm
±3 dB
Replace RF4 module.
Yes
Troubleshooting
To page 6- - 76
No
6- 75