1261B User Manual
Racal Instruments
Ó
1995
Using The Enhanced Monitoring System 4-31
Since the LED display can accommodate only 10 characters at a
time, and since the status “clock” is always shown at the right-
most position, only 9 characters may be displayed at one time.
The EMS will automatically “scroll” messages longer than 9
characters from left to right at the rate of 2 characters per
second. Thus, if the command:
DISPLAY:TEXT “This is My String”
is executed, then the front panel will show the following
characters in succession:
This is M
his is My
is is My
s is My S
is My St
is My Str
s My Stri
My Strin
My
String
The presently programmed text string may be read using the
query:
DISPLAY:TEXT?
The EMS will reply to this query with the string enclosed in
double quotes. If a double quote is part of the displayed string,
then two consecutive double quotes will be shown in the reply as
follows:
“This has a double quote “” embedded in it”
The user string may be set to a length of 0 by sending the
command:
DISPLAY:TEXT “”
If this command is executed, the display will show nothing
UNLESS an out-of-tolerance condition is detected by the EMS.
Clearing The
Message From The
Display
The user message may be cleared entirely by executing the
command:
DISPLAY:TEXT:CLEAR
After this command has been executed, the EMS will behave as
if no user message has been defined. This will then return to
displaying the “System OK” or out-of-tolerance message(s).
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