Giga-tronics 58542 - Offsets

58542 VXIbus Universal Power Meter
2-38 Publication 21555, Rev. E, September 2002
2.5.22 Offsets
■ SENSe:CORRection
Sensor power offsets apply to the individual sensor. Use sensor offsets to account for the loss of
attenuators, which are commonly used during measurement to reduce standing waves to improve
measurement accuracy. If measuring high power signals (>100 mW), but are not using Giga-tronics high
power sensors, use a power attenuator between the high power output and the sensor input to prevent
damage. Enter the value of attenuation as a sensor offset, and the 58542 will automatically respond with
the actual power level output in its measurement data.
SENSe:CORRection
Syntax:
SENSe<sensor 1 or 2>:CORRection:OFFSet:COLLect
Example:
OUTPUT @PWR_MTR;SENS1:CORR:OFFS:COLL ! TAKE SENSOR 1 CURRENT READING AS OFFSET
! VALUE
Description:
This command enters the current power level reading as the offset value.
Syntax:
SENSe<sensor 1 or 2>:CORRection:OFFSet[:MAGnitude]space<offset value in dB, -99.99 to 99.99>
Example:
OUTPUT @PWR_MTR;SENS2:CORR:OFFS 10.2 ! COMPENSATE SENSOR 2 FOR 10.2 DB
! ATTENUATION
Description:
This command enters a specific sensor offset value.
Syntax:
SENSe<sensor 1 or 2>:CORRection:OFFSet[:MAGnitude]?
Example:
OUTPUT @PWR_MTR;SENS2:CORR:OFFS? ! QUERIES SENSOR 2 OFFSET VALUE
Response:
0.0000E+00 for 0 dB.
Description:
This query reports the current dB sensor offset value which is being subtracted from
measurements.
Syntax:
SENSe<sensor 1 or 2>:CORRection:OFFSet:STATespace<ON | OFF>
Example:
OUTPUT @PWR_MTR;SENS2:CORR:STAT ON ! ENABLES SENSOR 2 OFFSET CORRECTION
Description:
This command activates and deactivates the sensor offset function.
Syntax:
SENSe<sensor 1 or 2>:CORRection:OFFSet:STATe?
Example:
OUTPUT @PWR_MTR;SENS2:CORR:STAT? ! QUERIES SENSOR 2 OFFSET FUNCTION STATUS
Response:
1 for ON or 0 for OFF.
Description:
This query reports the ON or OFf status of the sensor offset function.