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15 INSTALLING OPTIONS
82
SO-3: The calibration hole must be on the right
side, looking from the front panel.
IF filters: Insert a primary IF filter in the OPTION
FILTER1 location, and a secondary IF filter in the
OPTION FILTER2 location. The transceiver
automatically detects what optional IF filter(s) is
installed when it is turned ON.
5 Solder all pins on the reverse side of the PCB.
SO-3: Cut the 2 wires marked as R103 and R104,
as shown below.
PADDLE
KEY
EXT.SP
DATA
REMOTE
COM
MIC
PANEL
OPTION FILTER2
OPTION FILTER1
TC
XO
O
PTION
R103
R104
X1
6 Replace the PCB in the transceiver and press
both the tabs downwards until secure.
7 Tighten the 3 screws and replace the top cover.
REFERENCE FREQUENCY CALIBRATION
Note:
The transceiver is adjusted at the factory prior to shipping.
Unless necessary, DO NOT perform this adjustment.
1 Set the following on the transceiver:
Mode: CW
AF control: Center
Menu No. 34 (CW RX pitch): 800 Hz
IF SHIFT control: Center
RIT function: OFF
Break-in function (VOX): OFF
2 Remove the top case (8 screws) from the
transceiver.
3 Tune in a standard frequency station such as
WWV or WWVH at, for example, 10.000.00 or
15.000.00 MHz.
Adjust the Tuning control so that the display
reads the exact frequency of the station.
•You should hear a beat tone of approximately
800 Hz.
For 800 Hz:
faf = (fdisplay/15.600 x freference) + 800 Hz
where freference is the shift from the 15.6 MHz
reference frequency.
4 Close your CW key. You will hear a transmit
sidetone of approximately 800 Hz.
This sidetone produces a double beat tone
when it combines with the received signal.
•Adjust the AF control to hear the double beat
clearly.
For 800 Hz:
fsidetone = 800 Hz ±50 ppm (= 800 ±0.04 Hz)
where freference is the shift from the 15.6 MHz
reference frequency.
5 TS-480 transceiver without SO-3:
Adjust the trimmer (TC1) to minimize the
frequency difference between the received 800 Hz
tone and the 800 Hz sidetone.
TS-480 transceiver with SO-3:
Adjust the trimmer inside the SO-3 using the
supplied plastic adjustment tool (W01-0406-XX).
Minimize the frequency difference between the
received 800 Hz tone and the 800 Hz sidetone.
6 Replace the top cover (8 screws).
90


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