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Chapter 4 Features and Functions
Scanning
External Scanning In this configuration, the instrument sweeps
through the scan list once each time a low-going TTL pulse is received
on the rear-panel Ext Trig Input line (pin 6).
Ext Trig Input
Gnd
Ext Trig Connector
You can specify a scan count which sets the number of external
pulses the instrument will accept before terminating the scan.
See "Scan Count" on page 86 for more information.
If the instrument receives an external trigger before it is ready to
accept one, it will buffer one trigger before generating an error.
All readings from the scan are stored in non-volatile memory.
Readings accumulate in memory until the scan is terminated
(until the scan count is reached or until you abort the scan).
Mx+B scaling and alarm limits are applied to measurements during
the scan and all data is stored in non-volatile memory.
Front-Panel Operation:
EXTERNAL SCAN
To initiate the scan, press
reminder that an External Scan is in progress. When a TTL pulse is
received, the scan starts and readings are stored in memory. To stop
a scan, press and hold
Remote Interface Operation: The following program segment
configures the instrument for an External Scan.
TRIG:SOURCE EXT
TRIG:COUNT 2
INIT
Note: To stop a scan, send the ABORt command.
. The EXT annunciator turns on as a
.
Select the external trigger configuration
Sweep the scan list 2 times
Initiate the scan
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