Tektronix SDA601, Service Manual

Page: 28 / 132

Operating Information
2- 6 SDA 601 Serial Digital Analyzer
Figure 2- 4: Connecting to a DCE Device with a DB25 Serial Port
NOTE
. Most Personal Computers are DTE devices; however, printers may be
either DTE or DCE, and the type may not be obvious from the printer documen-
tation or the gender of the RS-232 connector. If you have trouble outputting from
the SDA601, first verify that communication parameter and Baud rate settings
are correct, then try reversing the conductors at pins 2 and 3 and 7and 8 at the
cable end that is connected to the SDA.
RS-232/Printer Setups.
Set the receiving device to 8 data bits, and one stop bit, if
possible.
The SDA601 supports both hardware (RTS/CTS) and software (Xon/Xoff)
handshaking; choose the appropriate handshaking protocol through the Utility/
Printer Setup submenu. Specify 60 lines per page (also in the Utility/Printer
Setup submenu) for most printers that use 8.5 x 11.0 inch paper.
Set the Baud rate and Parity—through the Utility/RS-232 Setup submenu—to
match the printer. When in doubt, set Parity to None.
Testing the Connection and Settings.
To test your printer connection and settings,
perform a signal analysis by pressing
Analyze
. Then, press
Shift-Analyze
. The
printer should respond by printing an analysis report that resembles the one
shown in Figure 2--5.