2308-900-01 Rev. A / July 2008
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Section Topics
9-11
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section 9: Measurement Commands and Optimizing Measurement Speed
Command notes
SYSTem:TRIGger:CONTinuous <b>
Applies to active channel
Trigger continuous mode was designed for use in conjunction with the 488.1 protocol
(SYST:MEP:STAT 0). When trigger continuous mode is enabled, the continuous trigger does not
cycle background readings, process commands that affect the measurement configuration such
as output state, function or integration time, etc., or service the other channel (if the instrument has
two channels).
On power up, this mode is set to disabled (OFF). This setting is not saved in user setups. While
this mode is enabled, do not recall a user setup or send an
*RST
command.
Using trigger continuous mode
Trigger continuous mode provides a faster reading rate. The fastest reading rate is achieved by
enabling this mode along with enabling the 488.1 protocol (
SYST:MEP:STAT 0
). Also, the format
for readings can affect speed. Selecting SREal format will provide a faster reading rate than when
in ASCII mode. Enabling trigger continuous mode turns display OFF while disabling it turns it back
ON.
488.1 protocol and trigger continuous mode enabled
When the 488.1 protocol and trigger continuous mode are both enabled, talking the instrument
returns triggered readings. The query
READ?
does not have to be sent before talking the
instrument for a reading. When using this configuration (488.1 protocol and trigger continuous
mode enabled), the instrument is continuously taking triggered readings. When the power supply
is talked without being asked for data, a recently triggered reading is returned.
Changing instrument configuration
To change instrument configuration, disable trigger continuous mode first. Do not change
configuration while trigger continuous mode is enabled. After sending the commands to make the
desired changes, enable the trigger continuous mode and resume taking fast readings by just
talking the instrument.
Programming sequence example
Table 9-4
shows an example of programming for the trigger continuous mode. This example
assumes that the 488.1 protocol is already enabled.
Table 9-4
Trigger continuous mode programming example
Command
Description
*RST
// Set the power supply to default reset conditions
FORM SRE
// Select SREal format for readings
Send commands here to configure the instrument for the desired measurements.
SYST:TRIG:CONT 1
// Enable Continuous Trigger Mode which turns display OFF.
*OPC?
// Query the power supply for when done processing the commands to configure
// instrument for desired measurements
Talk the power supply to get the ASCII one response back for *OPC?
Talk the power supply for readings
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