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Model 8902A
Operation
3-10. MEASURING RECEIVER REMOTE CAPABILITIES (IEEE-488)
The capabilities of the HP 8902A in remote operation and their related IEEE Std 488 terms are
described in Table 3-7, "Measuring Receiver Remote Capabilities Table". The twelve capabilities
described there are further described in the paragraphs following the table.
Tahk 3-
7. Mtwwring Rtwivcjr
Remoie Capahiliiies
(1
o
Capability
Data
Trigger
Clear
Remote
Local
Local Lockout
Clear Lockout/
Set Local
Enabled
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Measuring Receiver Capabilities
Response
All front-panel functions, special functions, and remote-only
functions are programmable, except the POWER switch. The
Measuring Receiver can send the Status Byte, and message and
setting information.
All
measurement results, special displays,
and error outputs (except dashed displays) are available via the
bus.
If in remote and addressed to listen, the Measuring Receiver
makes a settled measurement. It responds equally to bus
command GET and program code T3, Trigger with Settling.
Clears Status Byte, RQS bit, Service Request message (if
issued), and sets the
SRQ
Mask to the
22.0SP
state. Responds
equally t o DCL and SDC bus commands. Resets many additional
parameters as shown in Table 3-8, "Response to a Clear
Message."
The Measuring Receiver's remote mode is enabled when the
REN bus line is true. However,
it
remains in local (Le., the front
panel is active) until it is first addressed t o listen. The output
signal and internal settings are unchanged when the Measuring
Receiver enters remote mode. All front-panel keys are disabled
except LOCAL and CLEAR, unless the instrument is in Local
Lockout.
The Measuring Receiver returns to front-panel control when it
receives the Local message. No instrument settings or functions
are changed except Trigger is set to Free-Run (TO). Responds ei-
ther to the GTL command or the keyboard Local key. The LOCAL
key will not work if the instrument is in LOCAL LOCKOUT.
All front-panel keys including the LOCAL and CLEAR keys are
disabled during Local Lockout so that only the controller or the
POWER switch can return the instrument t o Local.
The Measuring Receiver returns to Local and Local Lockout
is
no longer true when the REN bus lines go false.
IEEE Stc
Commands
and Control
Lines
MLA
MTA
GET
DCL
SDC
REN
M LA
GTL
LLO
REN
*
Commands, Control Lines, and Interface Functions are defined in IEEE Std 488 (and the identical ANSI Standard MC1.l). F
I88
'
Interface
Functions
AH1
SH1
T5
L3
DTl
DC1
RL1
R
L1
RL1
RLl
)wledge of
these might not be
necessary
if your controller describes its capabilities in terms of the
HP-IB
capabilities shown in the left column.
3-2
1
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