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The correspondence between the display characters and the telegraph codes is shown in the
attached sheet.
Reception of RTTY
Since the unit incorporates a PLL system one side demodulator, it can receive commercial, mete-
orological and amateur communication with a certain signal intensity.
When an optional terminal unit is connected by using external input terminal (TTL. IN), the
unit can be upgraded to the maximum functional state.
Set the switches as follows:
CW/RTTY selector: RTTY (Switch is ON)
At this time, the following message is displayed in the bottom line of the screen:
<Baudot Code> LTR UOS-OFF 45 Baud
HF band (Mode set LSB)
Turn the reception dial of the transceiver, RIT or clarifier and adjust so that the MONITOR LED
flickers when receiving a mark. In 170 Hz shift, the flickering of LED varies as shown below, so
that critical adjustment is necessary.
When the dial is turned gradually from the low beat pitch side to the high pitch side and MONITOR
LED changes thus:
Goes out
→
Flickers
→
Lights
→
Flickers
→
Goes out
(continued light
at mark)
(middle between
mark and space
(continued light
at space)
Adjust to the first flickering point. If characters are not displayed normally through fine adjustment
(only numerals and symbol are displayed and characters do not appear), press the CASE button.
Or, if the characters are not displayed normally, it is also probable that the shift may be reverse.
Adjust to the latter flickering point.
It must be noted that when the shift width is more than 170 Hz, the LED flickers at to positions ac-
cording to the shift width but does not light in the middle point.
VHF band
Since the VHF band is shifted in the reverse direction of the HF band, reception to USB.
The baud rate of this set is adjusted to 45.45 bauds, and signals of different baud rate can-
not be interpreted. For the procedure of changing the baud rate, refer to the section on the
adjustment.
If the frequency cannot be adjusted because of the selection type dial, adjust the fre-
quency of the internal demodulator according to the procedure of adjustment given below.
