Specifications

1-7
Remote Operation
Using GP-IB
Serial Poll (SPOLL)
A serial poll will retrieve the value of the primary status byte. This byte contains useful
information about the current state of the instrument. For example:
SPOLL(718)
Remote Enable (REMOTE)
The Remote command instructs the instrument to enter the REMOTE state and be ready to
accept instructions via GP-IB.
When the Agilent 71612 receives this command it illuminates the front panel REMOTE
LED, for example:
REMOTE 718
Local Lockout (LOCAL LOCKOUT)
It is recommended that the Local Lockout command is sent after the Remote. This
disables the front panel local key preventing the return to local mode and thus any
interference to the instrument settings.
It should always be preceded by the REMOTE command, for example:
LOCAL LOCKOUT 7 (configures all the instruments on the bus to the Local Lockout
condition.)
NOTE If the instrument has been set to the LOCAL LOCKOUT condition,
then the front panel LOCAL key is disabled. The instrument can only
be returned to LOCAL operation by the controller sending the LOCAL
command or by cycling power to the instrument.
Local (LOCAL)
The Local command returns the instrument from Remote operation to local front panel
control, for example:
LOCAL 7 or LOCAL 718
Sending Commands Over GP-IB
To send commands over the GP-IB involves sending the command string via the interface
select code to the device address. HP Computers use the Basic instruction OUTPUT to
send command strings. The structure of a command line is as follows:
OUTPUT interface select code + device address; “command string”