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1256 User Manual
PROBLEM
Display is too dim or too
bright.
RS-232 Remote Interface
PROBLEM
Remote terminal receives
unintelligible text from 1256,
but only immediately after
power turn-on. Text is
properly received later on.
Remote terminal receives
unintelligible text from 1256.
No intelligible text is received
at all.
Racal Instruments © 2002
POSSIBLE CAUSES
•
Display intensity needs to
be set to personal
preference.
POSSIBLE CAUSES
•
Upon turn-on, the 1256
sends synchronization data
at 115,200 baud to the RS-
232 port in case a flash
programmer is connected.
If a programmer is present,
this indicates to the
programmer that the 1256
is ready for programming
operations. Unintelligible
characters on a normal
terminal at power up are
expected if terminal baud
rate is not set to 115,200.
•
Baud rate of 1256 not
matched to baud rate of
terminal.
•
Parity setting of 1256 not
matched to parity of
terminal.
•
Number of data bits setting
of 1256 not matched to
number of bits for terminal.
•
Slow data terminal
response (usually when
using an older terminal).
WHAT TO DO
•
Set display intensity (see
Chapter 3, Using the Front-
Panel Controls, under the
heading Enabling or Setting
the Display Intensity.
WHAT TO DO
•
Ignore unintelligible text that is
received immediately after
power turn-on.
•
Set baud rate of 1256 to match
that of the data terminal (see
Chapter 4, GPIB and RS-232
Interfaces, under the heading
Setting the Baud Rate).
•
Set parity of 1256 to match that
of the data terminal (see
Chapter 4, GPIB and RS-232
Interfaces, under the heading
Setting the Data Bits, Stop
Bits, and Parity).
•
Set number of data bits of 1256
to match that of the data
terminal (see Chapter 4, GPIB
and RS-232 Interfaces, under
the heading Setting the Data
Bits, Stop Bits, and Parity).
•
Set number of stop bits of 1256
to 2 (see Chapter 4, GPIB and
RS-232 Interfaces, under the
heading Setting the Data Bits,
Stop Bits, and Parity).
Appendix C-3
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