1257 User Manual
EADS North America Defense
Troubleshooting C-3
Test and Services, Inc.
©
200
PROBLEM
POSSIBLE CAUSES
WHAT TO DO
Display is too dim or too
bright.
•
Display intensity needs to
be set to personal
preference.
•
Set display intensity (see
Chapter 3, Using the Front-
Panel Controls
, under the
heading
Enabling or Setting
the Display Intensity
.
RS-232 Remote Interface
PROBLEM
POSSIBLE CAUSES
WHAT TO DO
Remote terminal receives
unintelligible text from 1257,
but only immediately after
power turn-on. Text is
properly received later on.
•
Upon turn-on, the 1257
sends data at 115,200
baud to the RS-232 to
synchronize a flash
programmer if present.
Unintelligible characters on
a normal terminal at power
up are expected if terminal
baud rate is not set to
115,200.
•
Ignore unintelligible text that is
received immediately after
power turn-on.
•
Baud rate of 1257 not
matched to baud rate of
terminal.
•
Set baud rate of 1257 to match
that of the data terminal (see
Chapter 4, GPIB and RS-232
Interfaces
, under the heading
Setting the Baud Rate
).
•
Parity setting of 1257 not
matched to parity of
terminal.
•
Set parity of 1257 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
).
•
Number of data bits setting
of 1257 not matched to
number of bits for terminal.
•
Set number of data bits of 1257
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
).
Remote terminal receives
unintelligible text from 1257.
No intelligible text is received
at all.
•
Slow data terminal
response (usually when
using an older terminal).
•
Set number of stop bits of 1257
to 2 (see
Chapter 4, GPIB and
RS-232 Interfaces
, under the
heading
Setting the Data Bits,
Stop Bits, and Parity
).
Summary of Contents for 1257
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