Kenwood TS-480HX, TS-480SAT instruction manual Installing Options, Reference Frequency Calibration

15 INSTALLING OPTIONS

¥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.

5Solder all pins on the reverse side of the PCB.

¥SO-3: Cut the 2 wires marked as R103 and R104, as shown below.

R104		R103
		X1
		OPTION FILTER1
EXT.SP		OPTION FILTER2
	DATA	REMOTE

MIC

PANEL

COM

P
ADDLE	KEY

6Replace the PCB in the transceiver and press both the tabs downwards until secure.

7Tighten 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.

1Set 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

2Remove the top case (8 screws) from the transceiver.

3Tune 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.

4Close 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.

5TS-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.

6Replace the top cover (8 screws).

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