HP 8642A Operating Manual page 42

Operation Model 8642A/B
HP-IB Capabilities (cont'd)
Table 3 - 1 . H P - I B Capability Reference Table
HP-IB
Capability
Data
Trigger
Clear
Remote
Local
Local
Lockout
Clear Lockout/
Set Local
Pass Control/
Take Control
Require
Service
Status
Byte
Status Bit
Abort
Applicable
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
Response
All front-panel functions, special functions, and remote-
only functions are programmable (except Knob
Rotation). The Signal Generator can send status byte,
message, and setting information. The front-panel
LSTN and TLK annunciators turn on as appropriate
when the instrument is addressed.
The Signal Generator does not have a device trigger
capability.
The Signal Generator responds equally to DCL and
SDC bus commands. The Clear capability does not re­
set instrument parameters.
The Signal Generator's remote mode is enabled when
the REN bus line is true. However, it remains in local
(i.e., the keyboard is active) until it is first addressed
to listen. The output signal is unchanged when the
Signal Generator enters the remote mode. The front-
panel RMT annunciator turns on when in remote mode.
The Signal Generator returns to front-panel control
when it enters the local mode. The output signal is
unchanged. Responds either to the GTL bus command
or the front-panel LOCAL key. The LOCAL key will not
work if the instrument is in the Local Lockout State.
Local Key is disabled during Local Lockout so only
the controller or the POWER switch can return the
Signal Generator to local.
Generator returns to local and Local Lockout is no
longer true when the REN bus lines goes false.
The Signal Generator cannot pass or take control of
HP-IB. However it does have limited control capability
that is intended for servicing the instrument. This con­
trol capability is accessed with Service Special
Functions.
The Signal Generator sets the SRQ bus line true if
one of the following conditions exists and it has been
enabled by the RQS mask to send the message for
that condition: Parameter Changed, Error, Ready,
Local/Remote, Execution Error, Hardware Error, or
End of Sweep.
The Signal Generator responds to a Serial Poll Enable
(SPE) bus command by sending an 8-bit byte when
addressed to talk. Bit 6 (RQS bit) is true if Signal
Generator had sent the Require Service Message.
Each bit requires different conditions for clearing.
The Signal Generator does not respond to a parallel
poll.
The Signal Generator stops talking or listening.
Related
Commands
and Controls*
MLA
MTA
EOI
GET
DCL
SDC
REN
MLA
GTL
LLO
REN
ATN
IFC
SRQ
SPE
SPD
MTA
ATN
EOI
IFC
Interface
Functions*
T6
L3
AH1
SH1
DTO
DC1
RL1
RL1
RL1
RL1
C1
C2
C3
C28
SR1
T6
PPO
T6, L3
"Commands, Control lines and Interface Functions are defined in IEEE Std 488 (and the identical ANSI Standard MC1.1). Knowledge of these might
not be necessary if your controller's manual describes programming in terms of the twelve HP-IB Messages shown in the left column.
Complete HP-IB capability as defined in IEEE Std 488 (and the identical ANSI Standard MCl.l) is:
SHI, AH1. T6, TEO, L3, LEO, SRI. RL1, PPO, DC1, DTO, Cl, C2, C3, C28, E2.
3-10