Kenwood TH-79AKSS Transmission Operation, Selection, VFO Operation, Memory Channel Operation

1)To listen to the received signal of the HF transceiver from the CMD speaker, push the RX ON key (key 2).

2)To silence the received signal from the CMD speaker, push the RX OFF key (key 5).

Note: If no function is performed for 20 minutes after pushing the RX ON key, the RX OFF function will activate automatically.

Reception volume is controlled with the AF volume control on the CMD. The AF volume control on the HF transceiver should be set at 9:00 to 10:00 (see below).

nAF Volume Control Set Up on the HF Transceiver

The AF volume control of the HF transceiver controls the modulation input on the 144 MHz band of the TRP. Thus, the HF transceiver AF control should be adjusted so that the sound from the CMD does not distort when a strong signal is received.

If reception from the HF transceiver cannot be heard:

∙Is the HF transceiver squelch closed?

∙Are headphones inserted into the HF transceiver’s headphone jack?

TRANSMISSION OPERATION

Transmission operation is described in the SSB mode.

1)Pushing the CMD PTT button places the HF transceiver in transmission mode. Speaking into the microphone at this time also modulates the HF transceiver.

Note:

uThere is a small time delay between the time the PTT button is pushed, and the time the HF transceiver transmits. In order to prevent the beginning part of your dialogue from being cut off, please wait for a moment before speaking.

uThe operation of this system does not allow transmission to operate with VOX.

2)Releasing the CMD PTT button places the HF transceiver into standby. Setting the modulation level of the TRP AF volume control to the center, and the MIC GAIN to 50 (TS-570D(G)/S(G)) typically yields a suitable level. To obtain an appropriate ALC level with the HF transceiver MIC GAIN, keep the controls at or near these suggested settings.

Potential Problems to be Aware Of :

1)Turning the HF transceiver speech processor ON occasionally causes RF feedback.

2)Using a linear amplifier with the HF transceiver may occasionally cause RF feedback.

SELECTION

nVFO Operation

∙By pressing the VFO A key (A key), you can select VFO A on the HF transceiver.

∙By pressing the VFO B key (B key), you can select VFO B on the HF transceiver.

∙By pressing the UP key (# key) or the DOWN

key (* key) while in either VFO A or VFO B, the frequency can be increased or decreased by one step (10 Hz in SSB). Each time the key is pressed, the frequency will change by one step.

∙By pressing the FREQUENCY ENTER key (VFO key), the frequency can be entered directly.

When the above display appears on your screen, the desired operation frequency of the HF transceiver can be input, using the 10-key DTMF pad. Any non-input digit is processed as a 0. After the correct frequency is input, press the FREQUENCY ENTER (VFO) key again, to transmit the input frequency to the HF transceiver. To cancel the frequency input, press the F key, MENU key, DUAL key, or MR key.

nMemory Channel Operation

∙By pressing the MR key (C key), the HF transceiver is selected.

∙By pressing the UP or DOWN key after having pressed the MR key, you can increase or decrease the memory channel by one. Each time the key is pressed, the channel will change by one step.

∙By pressing the M. CH ENTER key (MR key), the channel can be entered directly.

When the above display appears on your screen, the desired channel of the HF transceiver can be input, using the 10-key DTMF pad. Any non-input digit is processed as a 0. After the correct channel is input, press the M. CH ENTER (MR) key again, to transmit the input channel to the HF transceiver. To cancel the channel input, press the F key, MENU key, DUAL key, or VFO key.

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