4 Remote Interface Reference
194 Keysight 34420A User’s Guide
Connection to a Printer
To connect to a printer you must use a DTE to DCE (Data Communications
Equipment) cable.
Set the meter to the TALK ONLY mode by setting the GPIB address to 31 from the
front panel. Then set the RS-232 interface as the active interface. See page 204
and page 207.
DTR / DSR Handshake Protocol
The meter is configured as a DTE (Data Terminal Equipment) device and uses the
DTR (Data Terminal Ready) and DSR (Data Set Ready) lines of the RS-232
interface to handshake. The meter uses the DTR line to send a hold-off signal. The
DTR line must be TRUE before the meter will accept data from the interface.
When the meter sets the DTR line FALSE, the data must cease within 10
characters.
To disable the DTR/DSR handshake, do not connect the DTR line and tie the DSR
line to logic TRUE. If you disable the DTR/DSR handshake, also select a slower
baud rate (300, 600, or 1200 baud) to ensure that the data is transmitted
correctly.