prog.book : chapter1.fm 67 Mon Feb 15 09:24:37 1999
Power Meter Remote Operation
Getting the Best Speed Performance
HP E4418B/E4419B Programming Guide 1-67
Free run
A channel is in free run whenINITiate:CONTinuous is set to ON and
TRIGger:SOURce is set to IMMediate.
Trigger immediate
There are a variety of methods to achieve this:
TRIG:DEL:AUTO OFF
INIT:CONT OFF
TRIG:SOUR IMM
INIT
TRIG:SOUR BUS
INIT:CONT ON
TRIG
TRIG:DEL:AUTO OFF
TRIG:SOUR BUS
INIT:CONT ON
GET or *TRG
TRIG:DEL:AUTO OFF
INIT:CONT OFF
TRIG:SOUR IMM
READ?
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
To Next Page
Loading...
Need help?
General
