Stanford Research Systems DS335, User Manual

Page: 49 / 86

Troubleshooting 4-3
DS335 Synthesized Function Generator
rate is 9600 baud. The DS335 always sends two stop bits, 8 data bits, and
no parity, and will correctly receive data sent with either one or two stop bits.
When connecting to a PC, use a standard PC serial cable, not a "null-
modem" cable. The DS335 is a DCE (Data Communications Equipment)
device, and so should be connected with a "straight" cable to a DTE device
(Data Terminal Equipment). The "minimum" cable will pass pins 2,3 and 7.
For hardware handshaking, pins 5 and 20 (CTS and DTR) should be passed.
Occasionally, pins 6 and 8 (DSR and CD) will be needed: these lines are
always asserted by the DS335.