External Triggering; Internal Triggering - HP E1312A User Manual

Checking the
Trigger Source

External Triggering

Internal Triggering

Chapter 2
The TRIGger:SOURce?
to show the present trigger source. The string is sent to the
"TTLTn"
output buffer.
Note
Note that a
CONFigure
trigger source to
with the TRIG:SOUR
or to TTLTrg< n
Use
TRIGger:SOURce EXTernal
•
The trigger signal must be a low-true pulse with a pulse width greater
than 1µs. The trigger signal level accepted is TTL (+5V maximum
negative-going to 0V). See the following diagram for the "Trig" input
requirement. The diagram also shows the "VM Complete" output you
can use to synchronize with a switch module.
•
The multimeter takes one reading (or the number specified by
SAMPle:COUNt
"Trig" BNC connector.
The trigger signal is always present in the internal triggering mode. This
mode is selected with the
•
The multimeter takes one reading (or the number specified by
SAMPle:COUNt
The multimeter takes only one reading immediately following a
MEAS? command.
•
See the triggering process diagram in Figure 2-1 on page 45.
HP E1312A/E1412A Multimeter Application Information
command returns
or command automatically sets the
MEASure?
. You must follow the
IMMediate
command to set the trigger source to
> . The MEAS? command always uses
to set the trigger source to external.
) for each external trigger received on the front panel
TRIGger:SOURce IMMediate
) immediately after a
, , , or
"BUS" "EXT" "IMM"
command
CONFigure
BUS , EXTernal
TRIG:SOUR IMM
command.
or command.
READ? INITiate
.
47