Keithley 7001 User Manual

IEEE-488 Reference
5-81
5.13.4
[:ROUTe] subsystem
:FCHannels <list>
[:ROUTe]:FCHannels <list> Define “forbidden” channel list
<list> = (@ forblist)
where; forblist is the specified list of “forbidden” channels that cannot be closed.
:fch (@ forblist)
Power-up Last defined “forbidden” channel list
*RST No effect
:SYSTem:PRESet No effect
:FCHannels? Query “forbidden” channel list
Short-form formats: :fch?
Response message: List of “forbidden” channels
The :FCHannels <list> command is used to define a list of channels that cannot be closed. The
following examples demonstrate various forms for expressing a forblist:
Forblist
1!1 Single channel (Slot 1, Channel 1).
1!6, 1!18, 2!3!6 Channels separated by commas.
1!2:1!10 Range of channels (2 through 10).
1!2:1!10, 1!20 Range entry and single entry separated by commas.
M36 Channel pattern stored at memory location M36.
A “forbidden” channel list can be cancelled by sending an empty forblist as follows:
:fch (@)
If you specify a channel to be restricted and it is already included in the Scan List and/or a Chan-
nel Pattern, then the entire Scan List and/or Channel Pattern is cleared (lost).
10 OUTPUT 707; “:fch (@ 1!1, 1!4); fch?”
20 ENTER 707; A$
30 PRINT A$
40 END
Line 10 Define the “forbidden” channel list and query the the list.
Line 20 Address the Model 7001 to talk.
Line 30 Display the list.
Parameter
Short-form
formats
Defaults
Query
command
Description
Programming
example
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Keithley 7001 Specifications

General

Max Switching Voltage	300 V
Max Switching Current	1 A
Operating Temperature	0°C to 50°C
Switching Speed	1 ms
Interface	GPIB, RS-232
Switching Type	Various, depending on installed switch cards (e.g., electromechanical, solid-state)

Summary

Warranty

Limitation of Warranty

Limits of warranty coverage, remedies, and exclusions.

Safety Precautions

7001 High Density Switch System Specifications

SYSTEM

Core system parameters including capacity, memory, timing, triggers, and I/O.

ANALOG BACKPLANE

Details on analog backplane signals, voltage, current, and isolation.

IEEE-488 BUS IMPLEMENTATION

GENERAL

1 General Information

1.3 Warranty Information

Details and procedures related to product warranty.

1.5 Safety Symbols and Terms

Explanation of safety symbols and terms used throughout the manual.

1.6 Specifications

Technical specifications of the Model 7001 instrument.

2 Card Installation

2.2 Model 701X Series Card Installation

Steps for installing 701X series cards into the mainframe.

2.3 Non-701X Series Cards

Steps for installing non-701X series cards into the mainframe.

4 Front Panel Operation

4.2 Power-up Procedure

Steps for connecting power and starting the instrument.

4.5 Mainframe Programming

4.7 Card Config

4.8 Scan Config

5 IEEE-488 Reference

5.2 IEEE-488 Bus Connections

5.3 Primary Address Selection

5.6 Status Structure

7 Maintenance

7.2 Service Options

7.3 Static-Sensitive Devices

Precautions for handling static-sensitive components.

7.5 Disassembly

Procedures for removing instrument covers and boards.

7.6 Diagnostics

How to run the instrument's built-in diagnostic tests.

7.8 Troubleshooting

Guidance for diagnosing and fixing instrument malfunctions.

8 Replaceable Parts

8.2 Electrical Components List

8.4 Ordering Information

8.5 How to Obtain Factory Service

Process for returning the instrument for factory service.

6 Theory of Operation

6.2 Overall Functional Description

General functional overview of the Model 7001.

6.3 Control Function

Description of the instrument's internal control mechanisms.

6.4 Relay Control Circuitry