HP 8642A - Page 67

Model 8642A/B Operation
HP-IB RELATED TERMS
active function prefix
Many HP-IB codes should not be entered without being prefixed by an active function code. For a list of
the active function codes and the codes that should be prefixed with an active function code, refer to
Table 3-8, Signal Generator Function to HP-IB Code (page 3-32), or Table 3-9, Signal Generator HP-IB
Code to Function (page 3-33).
alphanumeric
The 8642A/B has an alphanumeric display; that is, the display can show both alphabetic and numeric
characters.
ASCII
ASCII is an abraviation for American Standard Code for Information Interchange (pronounced "ask-ee").
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-IB
interface. Refer to page 3-27.
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 annunciator in the display of the 8642A/B indicates that this Signal Generator is pulling the
HP-IB SRQ line low.
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