HP 5344S User Manual

Model 8756A
Operating Information
PASS CONTROL
The HP 8756A does not respond to the TCT (Take Control} message; thus
it cannot take or pass control of the HP-IB.
REMOTE/LOCAL/LOCAL LOCKOUT
The HP 8756A is in remote mode when the REN (Remote Enable} line on
the interface goes low (TRUE} and it receives its Listen Address.
This condition is indicated when the "R" (Remote} and "L" (Listen)
LED's are lit in the INSTRUMENT STATE area of the front panel. When
the HP 8756A receives its Talk Address, the "T" (Talk} LED is lit and
the "L" LED goes out. Under remote, only the LINE switch and the
LOCAL key are enabled. On receipt of the LLO (Local Lockout)
message, the LOCAL key is disabled.
The state of the REN line is also sensed by the 8756 SYSTEM INTERFACE;
an instrument on this interface, designated as the pass through
instrument on the 8756 SYSTEM INTERFACE with the PT command, is
placed in remote or local depending on the state of this line. When
the 8756A is placed in Local Lockout, the HP-IB Sweep Oscillator is
also placed in Local Lockout.
The HP 8756A will return to local mode when it receives the GTL (Go To
Local) message or when the REN line goes high (FALSE} • It will also
return to local when the LOCAL key is pressed unless the LLO message
was previously received. On power on, the HP 8756A is in local mode.
When the 8756A is first placed in Remote, the instrument state front
panel settings are unchanged. Those functions not specifically
programmed are also not changed, unless the "IP" command is received.
PARALLEL POLL & STATUS BIT
The HP 8756A does not respond to the PPC (Parallel Poll Configure) or
PPU (Parallel Poll Unconfigure) messages.
TRIGGER
The HP 8756A does not respond to the GET (Group Execute Trigger}
message ..
SERVICE REQUEST & STATUS BYTES
The HP 8756A can initiate a Service Request (SRQ} message when one of
the following conditions exists:
1. A Service Request (SRQ} has been initiated by the instrument
designed as the pass through instrument.
2. HP-IB Command Syntax Error.
3. End of Operation (sweep or plot completed}.
Figure 3-4. HP-IB Operating Fealures (6 of7)
3-31

HP 5344S Specifications

General

Brand	HP
Model	5344S
Category	Measuring Instruments
Language	English