HP 81101A Reference Manual page 85

Examples
To set up a triggered burst of 16 Single Pulses at Out1, each burst
triggered by a positive edge at the EXT INPUT:
:ARM:SOUR EXT1
:ARM:SENS EDGE
:ARM:SLOP POS
:TRIG:COUN 16
:TRIG:SOUR INT1
:DIG:PATT OFF
:PULS:DOUB OFF
To set up gated pulses (Single Pulses at Out1), gated by a positive level at
the EXT INPUT:
:ARM:SOUR EXT1
:ARM:SENS LEV
:ARM:SLOP POS
:TRIG:COUN 1
:TRIG:SOUR INT1
:DIG:PATT OFF
:PULS:DOUB OFF
Command
:TRIG:IMP
Long
:TRIGger:IMPedance
Form Set & Query
Parameter
Numeric
Parameter Suffix OHM with engineering prefixes, e.g.: MOHM is Megaohms.
50 Ω
*RST value
50 Ω or 10 kΩ
Specified Limits
Description
Use this command to program the input impedance of the CLK-IN
connector. Note that only two settings are available. If you try to program
any other value, it will be rounded to one of the specified values.
Example To set the input impedance and the threshold of the CLK-IN connector:
:TRIG:IMP 50OHM
:TRIG:LEV 2.5V
:TRIG:SOUR EXT2
SCPI Instrument Command List
Set arming from EXT INPUT
Set arming on edges
Set arming on positive edges
Burst length 16
Pulse period trigger from internal osc.
Disable pattern operating mode
Ensure single pulses at OUTPUT
Set arming from EXT INPUT
Set arming on levels
Set arming on positive level 1 pulse period
Single pulse output mode
Pulse period trigger from internal osc.
Disable pattern data
Ensure single pulses at OUTPUT
Set CLK-IN impedance to 50 Ω
Set CLK-IN threshold to 2.5V
Pulse period trigger from CLK-IN
Programming Reference
85