Specifications

Command Set 3-37
3. 30. Read TTL Input Low Trigger Level
@Description
Read the TTL input low trigger level.
@Syntax
$(Addr)1L<CR>
$
Command leading code.
(Addr) Address ID (2-character)
1L
TTL input low trigger level command code.
@Response
!(Addr)(ThData)<CR>
or
?(Addr)<CR>
!
Command is valid.
?
Command is invalid.
(Addr)
Address ID.
(ThData)
The high trigger level for TTL input. The unit is
0.1 V and its resolution is 0.1 V too. This value
range from 0.1 to 5V, which is a 2-digit integer.
@Example
User command: $301L<CR>
Response: !3008<CR>
Item Meaning Description
$ (Leading Code) Command leading code.
30 (Addr) Address ID is 30H.
1L Read TTL input low trigger
level.
!
Command is valid.
30
Address of counter/frequency module.
08
The low trigger level is 0.8 V.