HP 8642A Operation And Calibration Manual

Appendix A
Model 8642A/B
Appendix A:
Glossary (cont'd)
heterodyne band
The heterodyne band covers the same frequency range as divide bands 1 through 6, but the
heterodyne band allows wider FM and <fJM deviation and wider frequency spans for Phase
Continuous Frequency Sweep. Refer to RF FtOequency, page 3- 39
last-selected value
A functIOn's last -selected value usually can be toggled on with the CQFE--ON] key.
power up
When the instrument is powered up, it goes through a sequence of internal c]lecks. Refer to
Instru ment Preset, Partia 1 Preset, page 3 -13 7.
queued up
A queued up list is a list of messages that can be accessed when the ( MSSG ) key is pressed again
and again. The MSSG annunciator will indicate when a message is queued up for display. Refer
to "Queued Up Messages" on page 3-180
RQS
RQS (request service) is from the Signal Generator's point of view. The request service (RQS) bit
is in the 8642A/B Status Byte This bit affects when the service request (SRQ) line is pulled on
the HP-JB interfa.ce. Refer to page 3-27.
scroll
Scrolling through the Help function list lets you view the description and code number of each
Special Function. (Refer to the Special Functions, page 3-167) You can scroll through the
message list by repeatedly selecting the CN@l key_
SRQ
SRQ is from the HP-IB controller's point of view. The service request (SRQ) line is a signal line
on the HP-IB interface This line is pulled low by the Signal Generator when it is requesting
serVIce. Refer to page 3- 27.
The SRQ annuncia.tor in the display of the 8642A/B indicates that this Signal Generator is
pulling the HP-·IB SRQ line low
3-200

HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English