Keithley 2606B System SourceMeter, Справочное руководство

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Section 3: Functions and features 2606B System SourceMeter® Instrument Reference Manual
3-80 2606B-901-01 Rev. B / May 2018
Controlling digital I/O lines
Although the digital I/O lines are primarily intended for use with a device handler for limit testing, they
can also be used for other purposes, such as controlling external logic circuits. You can control lines
either from the virtual front panel or over a remote interface.
To set digital I/O values from the virtual front panel:
1. Press the MENU key, select DIGOUT , and then press the ENTER key or press the navigation
wheel .
2. Select DIG-IO-OUTPUT , and then press the ENTER key or the navigation wheel .
3. Set the decimal value as required to set digital I/O lines in the range of 0 to 16,383 (see the table
in Digital I/O bit weighting (on page 3-80)), and then press the ENTER key or the navigation
wheel .
For example, to set digital I/O lines 3 and 8, set the value to 132.
4. Press the EXIT (LOCAL) key as needed to return to the main menu.
To write-protect specific digital I/O lines to prevent their values from being changed:
1. Press the MENU key, then select DIGOUT , and then press the ENTER key or the navigation
wheel .
2. Select WRITE-PROTECT , and then press the ENTER key or the navigation wheel .
3. Set the decimal value as required to write-protect digital I/O lines within the range of 0 to 16,383
(see Digital I/O bit weighting (on page 3-80)), and then press the ENTER key or the navigation
wheel .
For example, to write-protect digital I/O lines 4 and 10, set the value to 520.
4. Press the EXIT (LOCAL) key as needed to return to the main menu.
To remove write protection, reset the decimal value to include only the lines that you want to write
protect. To remove write protection from all lines, set the value to 0.
Digital I/O bit weighting
Bit weighting for the digital I/O lines is shown in the following table.
Digital bit weight
Line # Bit Decimal
weighting Hexadecimal
weighting
1 B1 1 0x0001
2 B2 2 0x0002
3 B3 4 0x0004
4 B4 8 0x0008
5 B5 16 0x0010
6 B6 32 0x0020
7 B7 64 0x0040
8 B8 128 0x0080
9 B9 256 0x0100
10 B10 512 0x0200
11 B11 1,024 0x0400
12 B12 2,048 0x0800
13 B13 4,096 0x1000
14 B14 8,192 0x2000