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Multimeter
Command and
Parameter Opcodes
Table B-1 contains the multimeter command and parameter opcodes. The
opcodes used to query the parameter settings are also included.
Table B-1. Multimeter Command and Parameter Opcodes
Multimeter
Parameter
Command
Opcode
Parameter
Opcode
Value Query
Opcode
Query
Response
Measurement
Function
04 00
01
02
DCV
ACV
(4-wire) OHMS
05 parameter
opcode
Range 02 00
01
02
03
04
05
125 mV / 256 Ω
1V / 2.048 kΩ
8V / 16.384 kΩ
64V / 131 kΩ
300V / 1.048 MΩ
Autorange
03 parameter
opcode
Aperture Time 00 00
01
02
03
04
05
06
267 ms
16.7 ms
320 ms
20 ms
2.5 ms
100 µs
10 µs
01 parameter
opcode
Autozero 08 00
01
02
On
Off
Once
09 parameter
opcode
Offset
Compensation
36 00
01
Off
On
37 parameter
opcode
Trigger Source 06 00
01
02
03 - 0A
Immediate
External
Hold
TTL trigger lines
0 - 7
29 parameter
opcode
Trigger Count 39 <upper byte>
<middle byte>
<lower byte>
1 - 16,777,215
(1),(3)
33 24-bit unsigned
number
(2)
Trigger Delay 23 <upper byte>
<middle byte>
<lower byte>
0 - 16.777215s
(1)
31 24-bit unsigned
number
(2)
Voltmeter
Complete Signal
Destination
40 8-bit binary number
(7)
0 - 7
(TTL trigger lines)
41 8-bit binary number
Sample Count 38 <upper byte>
<middle byte>
<lower byte>
1 - 16,777,215
(1),(4)
32 24-bit unsigned
number
(2)
Sample Source 07 00
01
02
03
Immediate
Timer
Software
Control Register
30 parameter
opcode
Sample Period
(5)
10 <upper byte>
<lower byte>
76µs - 65.534ms
(1)
11 16-bit unsigned
number
(2)
Software Sample
(6)
35 —- —- —- ...
Trigger Arm 12 00
01
Un-armed
Armed
—- —-
Trigger Immediate 13 —- —- —- ...
Send Error 15 —- —- —- —-
Table B-1 Continued on Next Page
96 HP E1351A/53A Register-Based Programming Appendix B