Tektronix Keithley 2601B-PULSE User Manual

Model 2601B-PULSE System SourceMeter® Instrument User's Manual Section 2: Installation
2601B-PULSE-900-01 Rev. A August 2021 2-33
RS-232 connections
Connect the RS-232 serial port of the 2601B-PULSE to the serial port of a computer using a
straight-through RS-232 cable terminated with DB-9 connectors. Do not use a null modem cable. The
serial port uses the transmit (TXD), receive (RXD), CTS and RTS (if flow control is enabled), and
signal ground (GND) lines of the RS-232 standard. The connector location is shown in Remote
communications interfaces (on page 2-12).
If your computer uses a DB-25 connector for the RS-232 interface, you need a standard cable or
adapter with a DB-25 connector on one end and a DB-9 connector on the other.
Figure 24: RS-232 interface connector
RS-232 connector pinout
Pin number
Description
1
Not used
2
TXD, transmit data
3
RXD, receive data
4
Not used
5
GND, signal ground
6
Not used
7
RTS, ready to send
8
CTS, clear to send
9
Not used
The following table provides pinout identification for the 9-pin (DB-9) or 25-pin (DB-25) serial port
connector on the computer.
Computer serial port pinout
Signal*
DB-9 pin number
DB-25 pin number
DCD, data carrier detect
1
8
RXD, receive data
2
3
TXD, transmit data
3
2
DTR, data terminal ready
4
20
GND, signal ground
5
7
DSR, data set ready
6
6
RTS, request to send
7
4
CTS, clear to send
8
5
RI, ring indicator
9
22
* The 2601B-PULSE does not use all RS-232 signals. See Flow control and signal handshaking (on
page 2-32).

Tektronix Keithley 2601B-PULSE Specifications

General

Brand	Tektronix
Model	Keithley 2601B-PULSE
Category	Measuring Instruments
Language	English