Tektronix Keithley 2651A Reference Manual page 213

Model 2651A High Power System SourceMeter® Instrument Reference Manual
To set digital I/O values from the 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
4. For example, to set digital I/O lines 3 and 8, set the value to 132.
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
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
1 B1
2 B2
3 B3
4 B4
5 B5
6 B6
7 B7
8 B8
9 B9
10 B10
11 B11
12 B12
13 B13
14 B14
2651A-901-01 Rev. C October 2021
weighting), and then press the ENTER key or the navigation wheel.
(on page 3-95)), and then press the ENTER key or the navigation
Decimal Hexadecimal
weighting weighting
1 0x0001
2 0x0002
4 0x0004
8 0x0008
16 0x0010
32 0x0020
64 0x0040
128 0x0080
256 0x0100
512 0x0200
1,024 0x0400
2,048 0x0800
4,096 0x1000
8,192 0x2000
Section 3: Functions and features
3-95