Hp-Ib Capabilities - HP 8642A Operating Manual

Model 8642A/B Operation
HP-IB CAPABILITIES
Overview The 8642A/B Signal Generator is designed to be compatible with a controller that
interfaces in terms of the 12 bus messages summarized in the HP-IB Capability
Reference Table on page 3-10. The bus functions are discussed in more detail in the
following text. The Signal Generator's complete capability (as defined by IEEE Standard
488 and the identical ANSI Standard MC1.1) is described at the bottom of Table 3-1 and
on page 1-2 under "HP-IB Capabilities".
HP-IB
Capabilities In remote mode, all front-panel controls are disabled except the Power switch and the
Local key (the Local key can be disabled by configuring the instrument in Local
Lockout). The Signal Generator will respond to each HP-IB message below according to
its associated listen or talk address. (Each of these capabilities is described in more detail
on the pages that follow.)
Input Data. When addressed to listen (with REN true), the Signal Generator stops
talking and can respond to input data. (Refer to page 3-1 1.)
Output Data. When addressed to talk, the Signal Generator stops listening and can send
output data. (Refer to page 3-15.)
Clear (Selected Device Clear, SDC). When addressed to listen (with REN true), the Signal
Generator stops talking and responds to SDC by clearing any uncompleted entries or
messages. (Refer to page 3-24.)
Clear (Device Clear, DCL). Regardless of the addressed state of the Signal Generator
(whether addressed to listen or to talk), it stops talking and responds to DCL by clearing
any uncompleted entries or messages. (Refer to page 3-24.)
Local. When addressed to listen (with REN true), the Signal Generator stops talking and
responds to the Local command by returning from remote control to local control.
(Refer to page 3-25.)
Local Lockout. Regardless of the addressed stat< if the Signal Generator (whether
addressed to listen or to talk), it responds to the Local Lockout command by disabling the
front-panel Local key. (Refer to page 3-26.)
Clear Lockout and Set Local. Regardless of the addressed state of the Signal Generator
(whether addressed to listen or to talk), it responds to the Clear Lockout and Set Local
command by re-enabling the front-panel Local key and returning from remote control
to local control. (Refer to page 3-26.)
Require Service. Regardless of the addressed state of the Signal Generator (whether
addressed to listen or to talk), it can send the Require Service message. (Refer to Service
Request, page 3-27.)
Status Byte. When addressed to talk, after receiving the Serial Poll Enable (SPE) bus
command, the Signal Generator outputs the Status Byte. (Refer to page 3-29.)
Abort. Regardless of the addressed state of the Signal Generator (whether addressed to
listen or to talk), it responds to the Abort command and stops listening or talking. (Refer
to page 3-31.)
HP-IB Capabilities from Local Mode
Besides having the above capabilities while '-emote, the following capabilities are also
available from the local mode:
o Require Service
• Status Byte
* Data (Output)
3-9