Boonton 4500B Peak Power Meter - Manual (Page 216)

Boonton 4500B RF Peak Power Analyzer
Remote Operation 5-16
CALibration:USER:FREQcal
Description: Performs a single-point sensor gain calibration of the selected sensor using an external (user-
supplied) 0dBm power reference at the current operating frequency. This method can be
combined with an AUTOCAL to yield the most accurate power readings at frequencies that are far
from the calibration frequency. It temporarily replaces the calfactor computed from the sensor‘s
factory-stored values with a measured result. If the channel Frequency setting is changed, the
original cal-factor will be restored. A FREQcal that attempts to set a cal-factor larger than 3 dB
will be rejected and an error returned.
Syntax: CALibration[1|2]:USER:FREQcal ?]
Returns: 0 if successful, 1 otherwise (query form only)
Valid Modes: Power sensors only.
CALibration:ZERO
Description: For a sensor that has been previously auto calibrated and has valid auto-cal status, performs a zero
offset null adjustment.
Syntax: CALibration[1|2]: ZERO[?]
Returns: 0 if successful, 1 otherwise (query form only)
Valid Modes: Power sensors only.
CALibration:ZERO
Description: Performs an offset null adjustment for the specified external trigger input. No external signal can
be applied during calibration.
Syntax: CALibration[3|4]: ZERO[?]
Returns: 0 if successful, 1 otherwise (query form only)
Valid Modes: External trigger inputs only..