prog.book : chapter1.fm 61 Mon Feb 15 09:24:37 1999
Power Meter Remote Operation
Triggering the Power Meter
HP E4418B/E4419B Programming Guide 1-61
Triggering the Power Meter
Triggering is a feature that is only available via remote programming of
the power meter.
The power meter has two modes of operation, standby mode and free run
mode. During local operation the power meter is always in free run mode.
During remote operation the power meter can operate in either free run
mode or standby mode and can be switched between modes at any time.
a) Standby mode means the power meter is making measurements,
but the display and remote interface are not updated until a
trigger command is received.
In this mode the power meter is either waiting to be initiated, or
waiting for a trigger (See “Trigger System” on page 63.).
b) Free run mode is the preset mode of operation and is identical to
local operation. The measurement result data available to the
remote interface is continuously updated as rapidly as the power
meter makes measurements. Entry into local mode via
sets the power meter to free run mode
In this mode INITiate:CONTinuous is set to ON and
TRIGger:SOURce is set to IMMediate.
To obtain accurate measurements, ensure that the input power to the
power sensor is settled before making a measurement.
The trigger configuration is automatically set by the MEASure? command.
If you want to use the lower level commands (READ? or INITiate), you
need to understand the power meter’s trigger model.
Preset
Local
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