Output Format - Keysight Technologies EPM-P Series Programming Manual

Power Meter Remote Operation 1
A trigger event can be any of the following:
NOTE
– The input signal meeting the trigger level criteria.
– Auto-level triggering being used.
– A TRIGger GET or *TRG command being sent.
– An external TTL level trigger being detected.
Trigger with delay
This can be achieved using the same sequences above (apart from the second)
with TRIG:DEL:AUTO set to ON. Also, the MEAS? command operates in trigger
with delay mode.
In trigger with delay mode, a measurement is not completed until the power
meter filter is full. In this way, the reading returned is guaranteed to be settled. In
all other modes, the result returned is simply the current result from the filter and
may or may not be settled. This depends on the current length of the filter and the
number of readings that have been taken since a change in power level.
With trigger with delay enabled, the measurement speed can be calculated
roughly using the following equation:
readings/sec = speed (as set by SENSe:SPEed) / filter length
For example, with a filter length of 4 and SENS:SPE set to 20, approximately 5
readings/sec will be calculated by the power meter.
In general, free run mode will provide the best speed performance from the power
meter (especially in 200 readings/sec mode).

Output format

The power meter has two output formats for measurement results: ASCii and
REAL. These formats can be selected using the FORMat command. When FORMat
is set to REAL, the result returned is in IEEE 754 floating-point format (note that
the byte order can be changed using FORMat:BORDer) plus <LF> as an end
sentinel of the block.
The REAL format is likely to be required only for FAST mode as a means to reduce
bus traffic.
Keysight EPM-P Series Programming Guide 93