Remote And Local Functions - HP 3325B Operating Manual

Remote Operation via RS-232 Interface
Table 2-8. Setting the Handshake: switch 7
Handshake description
Switch 7
Software pConAoff)
up
Hardware (DTR/RTS)
down
Remote and Local Functions
The first character of a remote command puts the HP 3325B in Remote Mode which causes
the Remote LED to illuminate. The Talk and Listen LEDs are not used when using the
:^-232 interface for remote control. When the HP 3326B receives the '^LCL" command or
the [Local] front-panel key is pressed, the HP 3325B returns to front-panel control.
Other remote-control commands that are useful for RS-232 operation are ECHO, RMT,
RST, and QSTB. These are described in more detail later in the chapter.
The RS-232 interface does not alert the controlling computer when the instrument
issues a service request (SRQ), as the HP-IB does. We recommend checking the
status byte periodically with the QSTB? command when the RS-232 interface is used
for remote control.
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