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UP-MODE-DOWN
Control of function of the
receiver RX134141MHz (setting of operating mode and frequency) can be done in
one of two manners. The first way is via
PC/RS-232/USB – setting of
frequency.
The seconds way is follows the
setting by the push-button MODE (UP - DOWN)
Push-button
MODE is functional after switching-on of the receiver and
initial
test. The following texts are progressively shown on
LCD
display:
After
termination of receiver’s initial test there will be displayed the
text "..SCAN WXTOIMG.."
In the mode
"..SCAN WXTOIMG.." the receiver RX134141MHz expects at its input
RS232 a code from decoding program WXtoIMG. After reception of the
code the display show current frequency in the following format –
e.g. 137.20MHz:
Program
WXtoIMG sends codes only frequencies 137.20 - 137.10 - 137.40 -
137.50 -137.62 - 137.91 - 137.30 - 137.70 - 137.80 - 137.85 MHz.
By pressing of
the push-button MODE you switch to another mode "..FIX MAN TUNG.."
... After pressing of the key UP or DOWN the displayed
value increases or decreases by one step equal to 10 kHz (mode
"STEP10KHZ" in the range from 134 to 141MHz):
By pressing of
the push-button MODE you switch to another mode "..SCAN.."
After pressing of
the push-button MODE you switch to another mode "..SCAN.." the displayed
value decreases by one step equal to in the range from 134 to 141MHz(
134.00-137.10-137.20-137.30-137.40-137.50-137.62-137.85-137.91-141.00MHz):
Scanning is
stopped on the current frequency, when the voltage level "L" .. 0
volt appears at the input IC7 SQ_OUT. This happens when
high-frequency signal of current frequency with amplitude 0,5uV and
modulation 2400Hz is present at the receiver’s input.
By next pressing of the
push-button MODE you will get from the mode "..SCANNING.." into
operating mode "..STEP10kHz.." After pressing of the key UP or DOWN the displayed
value increases or decreases by one step equal to in the range from 134 to 141MHz
... 137.50MHz is start frequency):
*
*
*
By pressing of
the push-button MODE you switch to another mode "..S-M-OOOOOO.."
, for experiments...
By pressing of
the push-button MODE you switch to another mode
"..SCAN WXTOIMG.."
, Program
WXtoIMG sends codes only frequencies 137.20 - 137.10 - 137.40 -
137.50 -137.62 - 137.91 - 137.30 - 137.70 - 137.80 - 137.85 MHz.
By next
pressing of the push-button MODE you will get from the mode
"..SCAN WXTOIMG.." into operating mode "..FIX
MAN TUNG..", when the receiver is
tuned progressively to the frequencies 137.20 - 141.00 MHz. By pressing the
keys UP or DOWN you can set the frequencies 137.20 - 137.10
- 137.40 - 137.50 - 137.62 - 137.91 - 137.30 - 137.70 - 137.80 -
137.85 - 134.00 MHz - 141.00 e.t.c. ...
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