Measurement Computing TempScan/1100 - Manual (Page 25)

TempScan / MultiScan User’s Manual 899493 System Overview 1-11
Handshaking. When the RS-232 port is used, the type of handshaking must be selected by the two
microswitches labeled H/S. The options available are: No handshaking, XON/XOFF, RTS/CTS or both
XON/XOFF and RTS/CTS handshaking. Note that XON/XOFF handshaking is valid for ASCII
transmissions only, and for RS-422 operation with a Macintosh, RTS/CTS handshaking is not
recommended.
Parity. The parity must be selected using the two microswitches labeled PARITY. The options provided
are: No parity, odd parity or even parity.
Baud rate. The baud rate is selected using the three microswitches labeled SERIAL BAUD RATE.
The available baud rates are 300, 600, 1200, 2400, 4800, and 9600.
Note: (1) XON/XOFF handshaking is valid for ASCII transmissions only. (2) At 9600 baud,
hardware (RTS/CTS) handshaking and possibly software (XON/XOFF) handshaking may be
required to maintain serial performance. However, for RS-422 operation with a Macintosh,
RTS/CTS handshaking is not recommended.
The rear panel DIP switch is read only during power-on or reset and should be set before applying power.
To modify any of these defaults, change the microswitch settings using a small screwdriver. The enclosure
does not need to be opened to change these settings.
Serial Connector Pins
The TempScan/1100 or MultiScan/1200 unit is equipped with one DB-9S serial connector on its rear panel
and requires a DB-9P mating connector. This connector is configured as an IBM PC when RS-232 levels
are selected, and as a Macintosh when RS-422 levels are selected.