HP 8153A - Page 168

select the reference you want by using one of TOA (or 0),
TOB (or 1) or TOREF (or 2). The reference is returned as a
floating point number in exponential number (NR3). The
returned value is in the selected absolute units (Watts
or dBm), if you specified TOREF (or 2), or in dB, if you
specified TOB (or 1) or TOA (or 0). No units are returned in
the response message.
Reiated Commands SEMS:P0W:REF, SENS:P0W:REF:STATE,
SENS:POW:REF:STATE?, SENS:PQW:REF:STATE:RATI,
SENS:P0W:REF:STAX:RATI?, SENS:PQW:REF:DISP,
SENS:POW:UNIT, SENS:POW:UNIT?
Example OUTPUT 722; "SENSl :P0W:REF? TOA”
ENTER 722 ;A$
SENSe:POWer:REFerence:DISPlay
Syntax SENSe[l|2]:POWer:REFerence:DISPlay”
Description This command sets the reference level for this module
from the input power-level. There are two types of
reference. One is where the power being read by the
module is expressed relative to this absolute level:
R.esult{dB) = Measured{dBm) — Refercnce{dBm)
Where the Measured value includes any calibration factor.
You select this by using TOREFwith the
SENSe: POWer: REFerence command.
The other type of reference is possible if you are using
two power sensors, one in each channel. Here the
quotient of the power readings for the two channels is
expressed relative to the reference level:
o FirsiChannelMcasurcd . ....
ResulUdB) » 7 ;- — -rrr- :{dB) - Reference{dB)
SecondC haTmed M easured
Where the Measured value includes any calibration factor.
You select this by using TOB or TOA with the
SENSe: POWer: REFerence command.
8-18 Remote Operation • Commands