Operating Messages - HP 8642A Operation And Calibration Manual

Model 8642A/B
Description
Procedure
Operation
OPERATING MESSAGES
The Operating Messages discussed in this instruction are grouped into six categories:
Parameters Changed messages (page 3 -182), Execution Error messages (page 3-184),
Hardware Error messages (page 3 -193), Information messages (page 3 -194), Prompt
messages (3 -196), and Out -Of -Lock messages (3-197).
Messages are displayed in a format that shows the wording of the message followed by
an alphanumeric code. (Alphanumeric codes combine a letter and a number; for
example, C 31.) The'message listing lists the messages as they are displayed, with the
alphanumeric code to the right of the message wording (not to be confused with the
message code number in the right margin of the listing). The messages are listed in
alphanumeric order.
Refer to either the 8642A/B On-Site Manual or the 8642A/B Service Manual for
information regarding Service and Calibration Messages that are not mentioned in this
Opera ting Manual.
When Using the Instrument Locally
You will usually be able to view each message whenever the Signal Generator is ready
to give you information. That is, you don't need to do anything to the instrument to
see a message. However, when you execute some instrument functions, a message is
queued up and can be displayed using the ( MSSG
I
key (these messages are noted in
the listing). The MSSG annunciator in the right portion of the display notifies you
that a message is queued up. To read queued up messages, just select the ( MSSG
I
key
repeatedly. When you read "END OF MESSAGE LIST .00" you know there are no
more messages in that list.
When Controlling the Instrument via HP-IB
You can access most of the messages using the "OC", "OE", and "OH" commands. (Refer
to the discussion about Output Messages, which begins on page 3-16 in the HP--IB
portion of this Section III) Messages accessed this way can be output in the form of a
message code number or as an actual alphanumeric message string. In the message
listing in this instruction, the message code number that can be output over HP-IB is
provided to the far right of the message. If no message code number is provided in the
listing, then that message can be read over HP-IB using Output Display (unless
otherwise stated), which is described in on page 3 - 21. If any unique message retrieval
prodedures exist for a message, they will be described in the individual message
description. Also, any message that cannot be read via HP-IB will be noted.
Many of the messages that can be output over HP-IB can be made to initiate a service
request. For more information about service requests, refer to Service Request on page
3-27 in the HP-IB portion of this Section III.
3-179