Tektronix 2715 User Manual page 250

Spectrum Analyzer Menus
6–68
RS-232 Configuration.
4. Press [2] to select RS-232 from the COMMUNICATION PORT CONFIG
menu.
Several choices are offered; in all cases the 2715 settings must match those used
by the controller or printer/plotter.
H Item 0, STATUS, enables you to toggle the RS-232 port on and off line. The
port must be on-line to communicate with any other device.
H Item 1, BAUD RATE, cycles through the baud rate of the port. Possible baud
rates are:
110
150
300
Normally, you set this parameter to as large a value as possible to speed up
data transfer. However, the controller, or the printer/plotter, must support
data transfers at the same rate. When 110 is chosen, two stop bits are
automatically selected; for any other value, 1 stop bit is automatically
selected. The default value is 9600.
H Item 2, DATA BITS, determines the number of data bits per word. The
default is 8 bits and is required for binary data transfers. Seven bits can be
used for ASCII character transfers.
H Item 3, PARITY, cycles between NONE, ODD, and EVEN. The default is
NONE.
H Item 4, EOL, sets the end-of-message designator when a message is sent by
the 2715. When a message is transmitted over RS-232, the instrument
sending the message signifies that the message has been completed. Item 4
enables you to select CR (carriage return), LF (line feed), or CR LF (both)
used to terminate messages sent to the 2715. The default is CR.
H Item 5, FLOW CONTROL, specifies the type of handshaking that will be
used. The following three choices are possible (see the Programmer manual
for expanded information on these selections):
HARD (RTS/CTS) — The RTS, CTS, DTR lines are used. The DCD and
DSR lines are ignored. This mode facilitates binary transfers.
SOFT (XON/XOFF) — XON/XOFF (CTRL Q/CTRL S) protocol is used.
Only transmit and receive lines are needed, but RTS and DTR must be
forced true. Suitable for use with a modem. However, code conflicts make
binary transfers unreliable.
600 4800
1200 9600
2400
2715 User Manual