HP 8642A - Page 52

Operation
Data Output (cont'«
Model 8642A/B
Output
HI, LO
Status
(OL)
Output HI, LO status enables an HP-IB Controller to monitor the level of the external
modulation signal by configuring the Signal Generator to output the status of the HI, LO
annuciators for AM, FM, or $M. The status can be read as either a numeric value or as a
string that represents the HI and LO annunciators.
Annunciator
HI
LO
neither HI nor LO
Numeric Value
Representation
+ 1
-1
0
String
Representation
HI
LO
OK
Following is a programming example in BASIC for outputting HI, LO status (OL):
Output from the Signal Generator (address 19) the status of its HI, LO annunciators for an
external, ac-coupled AM signal.
To output the numeric value:
10 OUTPUT 719; "AMOL"
20 ENTER 719; V
To output the string:
10 OUTPUT 719; "AMOL"
20 ENTER 719; V
30 ENTER 719; A$
Dummy read of the numeric value
3-20