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Remote Operation via HP-IB
HP 3325B HP-IB Capability
The HP 3325B interfaces to the HP-IB as defined by IEEE Standard 488-1978. The interface
functional subset which the HP 3325B implements is specified in table 2-1.
Table 2-1. HP 3325B HP-IB Capability
Code
Function
SH1
Compiete source handshake capability
AH1
Complete acceptor handshake capability
T6
Basic talker; serial poll; unaddressed to talk if addressed to listen;
no talk-oniy
L3
Basic listener: unaddressed to listen if addressed to talk; listen-only
SR1
Compiete service request capability
RL1
Complete remote/iocai capability
PRO
No parallel poll capability
DC1
Device clear capability
DT1
Device trigger capability
CO
No controller capability
El
Driver electronics - open collector
Talk/Listen Addresses
Each HP-IB device has at least one talk and one listen address unless the device is either
totally transparent or is a talk-only or listen-only device. Device addresses are used by the
commaric? mode (ATN true) to specify the talker (via a talk address)
and the listener(s) (via listen addresses). Only one device may be addressed to talk at a time.
The address of a device is usually preset at the factory but may be set to another value
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configuration. In the binary representation of the address, the device address
IS the decimal equivalent of the five least-significant bits of the address. (On HP-IB devices
vitn selector s\vitches, these are the five address switches.) The address can be from 0 to 31
inclusive. The sixth and seventh bits determine if the address is a talk or listen address
respectively. High-level^-IB controllers typically configure these two bits automaticaliy.
iable 2-2 lists the HP-IB addresses if a controller requires the talk and listen addresses.
2-5
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