Keysight Technologies X Series Service Manual page 165

RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
8. Front End Assembly Control Logic Verification
Since the RF Front End Troubleshooting board is connected, now is a good
time to test out the remaining control circuits from the A15 Front End Control
Assembly.
Table 4-9 Front End Control Logic
Test Point Description
S2A Sets switch for Low Band/preamp path
S2B Sets switch for Low Band/preamp path
S3A Sets E-atten to 5 dB preamps off
S3B Sets E-atten to 5 dB preamps off
S4A Sets E-atten to 10 dB preamps off
S4B Sets E-atten to 10 dB preamps off
S5A Sets E-atten to 2 dB preamps off
S5B Sets E-atten to 2 dB preamps off
S6A Sets E-atten to 1 dB preamps off
S6B Sets E-atten to 1 dB preamps off
S7A Sets E-atten to 2 dB preamps off
S7B Sets E-atten to 2 dB preamps off
S8A Sets E-atten to 20 dB preamps off
S8B Sets E-atten to 20 dB preamps off
S9A Controls in & out to low band preamps off
S9B Controls in & out to low band preamps off
S11A Sets path for 1st or 2nd L.O.
S11B Sets path for 1st or 2nd L.O.
S12A Sets path for L.O. normal or
x2 for band 4
S12B Sets path for L.O. normal or
x2 for band 4
S13A Sets path for L.O. to either of the high band
mixers and L.O. output
S13B Sets path for L.O. to either of the high band
mixers and L.O. output
Keysight N9010A EXA Service Guide
Instrument Settings
CF 50 MHz preamp on
CF 50 MHz preamp on
E-atten = 5 dB
E-atten = 5 dB
E-atten = 10 dB
E-atten = 10 dB
E-atten = 2 dB
E-atten = 2 dB
E-atten = 1 dB
E-atten = 1 dB
E-atten = 2 dB
E-atten = 2 dB
E-atten = 20 dB
E-atten = 20 dB
E-atten = off
E-atten = off
CF 1 GHz
CF 1 GHz
CF 1 GHz
CF 1 GHz
CF 5 GHz
CF 20 GHz
CF 5 GHz
CF 20 GHz
Vol tage Tolerance
(VDC) (VDC)
+9.67 ±0.5
+9.83
±0.5
+9.67 ±0.5
+9.83
±0.5
+9.67 ±0.5
+9.83
±0.5
+9.67 ±0.5
+9.83
±0.5
+9.67 ±0.5
+9.83
±0.5
+9.67 ±0.5
+9.83
±0.5
+9.67
±0.5
+9.83
±0.5
+9.83 ±0.5
+9.67
±0.5
+9.67 ±0.5
+9.83
±0.5
+9.83 ±0.5
+9.67 ±0.5
−9.67 ±0.5
+9.67
+9.83
±0.5
−9.83
165