Boonton PIM 31 User Manual User Manual
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are prone to such reflections. If the returned energy is too high, PIM31 will switch
off to protect its hardware. A remedy is to simply increasing RF power gradually.
SPU Time: Increments 1s, Settings range 0sec to 60sec
Default: 0s
Example: With a power setting for 43dBm and SPU of 10s it takes 10 seconds to
ramp RF power up from 20dBm to 43dBm
Note: PIM31 starts measuring immediately after RF power is present at
the RF Port. During the period power is ramping up, PIM
measurements are lower than the ones at the final power level.
Remember, PIM is measured in dBc – power relative to the carrier:
Lower carrier power equals lower PIM readings.
To ensure users do not misinterpret a “good” reading during power
ramp-up, a blinking “SPU” marker is shown during the time. Measurements
should not be considered valid when the red SPU indicator is flashing. Please
wait for this indicator to disappear before considering the measurement valid.