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TM-2
j.
BITE, or the built in test function, can be invoked in local mode at any
time by simultaneously depressing LOCK and AM.
BITE will then·· determine,
organize,
and display
the
bandwidths of
the
IF
filters
installed
in
the
receiver, as well as test receiver parameters for proper operation.
Any errors
will be displayed on the main
LCD
display.
(See Table B-2 for list and explana-
tion of errors.)
If there are no errors, the receiver will return to its pre-
BITE frequency, detector mode, etc., when BITE is complete, an9- will use and
display the new filters data.
If
any errors were· encountered, the· old filter
data will remain
unchaRg~d.
In addition:
LOCK and
CW
can be used to force BITE to proceed to the next sequential
test after an error has caused it to stop.
LOCK and USB can be used to force BITE to cycle in a tight scope loop
for analysis
LOCK and LSB can be used to prematurely terminate BITE.
k.
Forced Bandwidth
Setup
i~
accomplished,
in ·case BITE
results
are
unsatisfactory, by simultaneously depressing LOCK and.ISB (but not during BITE!)
The LCD display will indicate AUX.
Entry of symmetrical filters is accomplished
using the digits 0-9,
in 100 Hz steps, delimited with the
ENTER
key..
For
example, to enter a .4 kHz (400 Hz) filter, "4" and "ENTER" would be pressed.
To enter 20 kHz,
"2",
"0",
"0";
"ENTER"
would be pressed.
(200 x 100 Hz
=
20 kHz).
USB and LSB filters can be loaded also,
using the USB and LSB
pushbuttons, each time followed by
ENTER.
Blank filter slots can be loaded
simply by pressing the enter key again.
When all seven filter slots have been
loaded,
the AUX indicator will go off automatically,
disabling any further
changes, and resetting the receiver to normal operation.
If it is desired to
terminate this function before all slots have been changed it is only necessary
to depress ISB.
B-3.
REMOTE OPERATION
B-4.
See Table B-1 for a complete list of remote commands and usage.
The
data is coded as ASCII characters, and transmitted as a string terminated with a
carriage return.
A typical string would look like the following:
F2.35D3Il.2M4B-2.3A37(CR)
B-3
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