Boonton PIM 31 User Manual - Manual (Page 91)

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• Set Signal Generator to IM3 frequency.
• Apply signal to PIM 31 (-60dBm to -120dBm)
• RSSI should measure the applied power
• If the reading is off by more than +/- 0.5 dB but not worse than
+/-15 dB, it may be an indication that receiver is out of
calibration. If the measurement shows a level lower than
-125dBm, the receiver does not detect the frequency at all. It
may be asynchronous. In the cases described above, contact
your nearest Boonton Service Center
.
With the reading in limits, continue procedure:
• Change the frequency of the RF Generator by 2.5 kHz.
• The receiver will filter the signal out and the RSSI reading of PIM31
should be lower than -125dBm.
With the reading in limits, continue procedure:
• Increase the PIM 31 Signal frequency F1 by 1 MHz
• Set Signal Generator to the frequency that correlates to the IM3 product of
frequencies F1 and F2
• Read the RSSI on PIM31; the value should be equal to +/-1 dB of Signal
Generator’s Power level
• Repeat the process you are no longer able to increase the signal
frequency F1 due to band restrictions
.
• If done, set F1 back to start frequency
• Decrease PIM31 Signal frequency F2 by 1 MHz
• Set Signal Generator to Frequency that results for IM3 product of
frequencies F1 and F2