HP 8901B Operation And Calibration Manual page 182

Operation Model 8901B
Service Request Message Check. This check determines whether
or
not the Modulation Analyzer
can issue the Service Request message (set the
SRQ
bus control line true). This check assumes t h a t the
Modulation Analyzer i s able to handshake, recognize its own address, make the remote/local changes,
and receive Data messages. Before beginning this check, select 40.0
SPCL.
DescriDtion
Send the first part of the Re-
mote message (enabling the
Modulation Analyzer to remote).
Address the Modulation Analyzer
to listen (completing the Remote
message) then send a Data mes-
sage (enabling a Service Request
to sent upon Instrument Error).
Make the controller wait 2 seconds
to allow time for the Modulation An-
alyzer message. (This step is not
necessary if sufficient time is allowed.)
Read the binary status of the con-
troller's HP-IB interface and store
the data in variable V (in this step,7
is the interface's select code).
Display the value of the SRQ bit.
Check that the Modulation Analyzer's
REMOTE, LISTEN, and SRQ annunci-
ators are on and that the controller's
display reads an SRQ value of 1, in-
dicating the Modulation Analyzer
issued the Require Service message.
HPL
rem 7
wrt714,"22.4SP
wait 2000
rds(7)
---f
V
dsp"SRQ =",bit (7,V)
BASIC
REMOTE 7
OUTPUT
714;"22.4SP
WAIT 2000
STATUS 7;V
For Series
200
STATUS 7,7;V
PRINT
"SRQ =";BIT (V,7)
For Series
200
PRINT
"SRQ =";BIT(V,lO)
3-64