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Remote Manual SIGLENT

SDM3055/SDM3055A 28

2.4.3 CALCulate:SCALe:FUNCtion {DB|DBM}

CALCulate:SCALe:FUNCtion?

Selects the operation that will be performed by the scaling function:

 DB performs a relative dB computation. The result will be the difference between the

input signal and the stored DB relative value (CALCulate:SCALe:DB:REFerence),

with both values converted to dBm (dB = measurement indBm – relative value in

dBm).

 DBM performs a dBM computation. The result is logarithmic and is based on a

calculation of power delivered to a reference resistance

(CALCulate:SCALe:DBM:REFerence), relative to 1 milliwatt. (dBm = 10 × log10

(measurement 2 / reference resistance / 1 mW)).

Note: This command applies only to ACV and DCV measurement functions.

Parameter Typical Return

{DB|DBM} DBorDBM

Enable the DB scaling function referenced to the next

measurement taken:

CALC:SCAL:FUNC DBM

CALC:SCAL:STAT ON

 For the dB function, the reference value can be automatically selected using the first

measurement converted to dBm as the reference value

(see CALCulate:SCALe:REFerence:AUTO), or it can be specified by

CALCulate:SCALe:DB:REFerence.

 Scaling function results must be in the range of -1.0E+24 to -1.0E-24, or +1.0E-24 to

1.0E+24. Results outside these limits will be replaced with -9.9E37 (negative infinity),

0, or 9.9E37 (positive infinity).

 This parameter is set to its default value after a Factory Reset (*RST) or Instrument

Preset (SYSTem:PRESet).

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