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TDS2CMA Communications Module
134
TDS1000/2000-Series Digital Oscilloscope User Manual
Setting Up and Testing the RS-232 Interface
You may need to set up and test the module RS-232 interface.
RS-232 is an 8-bit serial communicati ons standard that lets the
oscilloscope communicate with an external RS-232 device such as a
computer, terminal, or printer. The standard defines two device
types: Data Terminal Equipment (DTE) and Data Communications
Equipment (DCE). The oscilloscope is a DTE device.
RS-232 Conventions on page 141 describes RS-232 convent ions.
RS-232 Connector Pinout Diagram on page 142 shows a diagram of
the 9-pin RS-232 connector with pin numbers and signal assign-
ments.
Selecting an RS-232 Cable
You need an RS-232 cable to connect the oscilloscope to an external
device. You can use the next table to choose the correc t cable.
To connect the
oscilloscope to You need this type cable
Tektronix part
number
PC/AT or laptop
computers
9-pin female to 9-pin female, null
modem
012-1379-00
PCswith25-pinserial
port connector
9-pin female to 25-pin female, null
modem
012-1380-00
Serial printers, such as
an HP Deskjet, and Sun
workstations
9-pin female to 25-pin male,
null modem
012-1298-00
Telephone modems 9-pin female to 25-pin male,
modem
012-1241-00