7451A/7461A/7461P Digital Multimeter Operation Manual
6.6 Digital Output (7461P Only)
6-13
6.6
Digital Output (7461P Only)
The TTL signal or the optical semiconductor relay contact signal can be output arbitrarily from the compar-
ator output terminal (COMPARATOR) on the rear panel by using the remote commands.
Only digital output enabled or disabled can be set by the panel keys. (Refer to Section 5.1.2, “Menu List.”)
Other output settings are only possible by using the remote commands.
When the digital output is enabled, the comparator calculation results are not output from the output terminal.
The comparator output is disabled.
Table 6-5 ADC Commands
Command
Description
DO0
Digital output disabled (Comparator output enabled)
DO1
Digital output enabled (Comparator output disabled)
DO?
Query of digital output
Reply: DO0 or DO1
DOSn
Controls arbitrarily the TTL signal or relay contact signal corresponding to 5 bits.
n (0 to 31) indicates a number that is converted from 5-bit binary to decimal.
Example: DOS0
DOS?
Query of digital output setting
Replay: DOS0 to 31
Pin name
TTL FAIL TTL PASS
RELAY
PASS
RELAY
HI
RELAY
LO
Output
signal
TTL output TTL output
Relay
contact
Relay
contact
Relay
contact
Pin number
9
1
2-6
3-7
4-8
Bit
4
3
2
1
0
Setting
0: H
1: L
0: H
1: L
0: H
1: L
0: H
1: L
0: H
1: L
H: break or Hi, L: make or Low
Pin name
TTL FAIL TTL PASS
RELAY
PASS
RELAY
HI
RELAY
LO
Output
Hi
Hi
break
break
break
