Guildline 6622T Series, Руководство по эксплуатации

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Section 7
OM6622T-A-00
30 January 2018
7-2
Instrument
IEEE-488 Address
Setting
Remote/Local Setting Controller Type
Setting
Model 6622T Bridge 4 N/A N/A
Table 7-1 : Factory Setting-GPIB
7.2.1. Controller
There can be only one designated controller in charge on the IEEE-488 bus. This device
exercises overall bus control and is capable of both receiving and sending data. The rest of
the devices can be designated as listener, talker or talker/listener.
The controller can address other devices and command them to listen, address one device
to talk and wait till the data is sent. Data routes are set by the controller but it need not take
part in the data interchange.
All controller query and command sequences should be terminated with the line-feed
character (0x0A) and or optionally, the controller should assert the EOI data byte control
signal to terminate the query command sequence.
The controller of the model 6622T is the computer system, which the user controls through
the BridgeWorks Data Acquisition Software.
7.2.2. IEEE-488 Responses
The reply to any IEEE-488 query command will be a sequence of ASCII characters
followed by a line-feed character (0x0A). The line-feed character may also be expressed as
0A
16
or 10
10
or 12
8
or control-J. Throughout this manual, the "C" programming language
notation is used for expressing numbers in base 16. Specifically, 0x0A indicates that 0A is
to be interpreted in base 16 (hex).
7.2.3. Interconnecting Cable And IEEE-488 Connector
The interconnecting cable of IEEE-488 1978 consists of 24 conductors; of which 16
conductors are for carrying signals and 8 conductors are for grounding. The individual
cable assembly could be up to 4 meters long. The cable should be double shielded and
should have both a shielded plug and a receptacle connector type at each end of the cable.
Guildline Instruments Part Number 996-23006 is a suitable IEEE-488 cable assembly of
length 2 meters. Each connector assembly is fitted with a pair of captive locking screws.