Kenwood TS-780 manual Rear Panel

26 RIT Control

With the RIT switch ON, the RIT knob allows the Operator to vary the receive frequency by about f 1.5 kHz without affecting the transmit frequency. The Center Position “0” is RIT-OFF.

2 7 IF SHIFT Knob

By using this control, the IF crystal filter Center frequency can be shifted + 1 kHz, allowing adjustment of tone quali- ty, or eliminating interference from adjacent frequencies. For normal Operation, this control should be set to the Center “ 0 ” Position (detent).

28 SQUELCH Control

Turning this control clockwise during F M m o d e w i l l activate the squelch circuit.

2 9 S C A N - W

This switch is used to select the scan width (0.5, 1, 3, 5 and 10 MHz).

30 AF GAIN Control

This control adjusts the gain of the receiver audio amplifier. Clockwise rotation will increase the output level

31 RF GAIN Control

For adjusting the RF amplifier gain of the receiver. The gain is minimum at the extreme counterclockwise Position. Nor- mally, this control is set in its extreme clockwise Position.

32 F . STEP Switch

By using this switch, the VFO frequency is varied at a slow or fast Speed as shown below. The operating conditions can be checked on the F. STEP indicator.

	F .	STEP
		O F F	O N
SSB.CW,FM		20 Hz	200 Hz
FM - CH		12.5 kHz	5 kHz	1

33 RIT Switch

This push switch turns the RIT (Receiver Increment Tuning) circuit ON and OFF. With the switch depressed, the circuit is activated and the RIT indicator is illuminated. The RIT cir- cuit is turned OFF when the switch is out.

34 SCAN Switch

This switch turns ON and OFF the VFO scan circuit. The VFO frequency is scanned at the Speed selected by the F. STEP switch. The switch is also used for re-scanning of M. S (memory scan) or for scanning at busy stop.

35 HOLD

This switch is used to stop scan Operation.

3 6 M . S Switch

This switch selects and scans the frequency stored in the memory channel. Scan is released by the HOLD switch or by setting the transceiver in transmit mode.

3 7 B A N D Switch

For selecting the band (144-145 MHz or 430-439 MHz) to be operated. By pressing the UP switch, the frequency is stepped up band by band. When the DOWN switch is pressed, the frequency is stepped down band by band. In either case, the band is switched in 1 MHz Steps.

38 M (Memory) Switch

This switch is used to store the desired frequency in the memory channel.

When the switch is depressed, an oscillation Sound is heard, indicating that the frequency is stored in the memory channel.

39 F . LOCK Switch

This switch locks the operating frequency of VFO. With the switch ON, the VFO frequency remains unchanged even when the tuning knob, BAND switch or MIC UP/DOWN switch is manipulated . This feature is useful when operating the transceiver on the same frequency for many hours, or when it is used for mobile Operation.

The RIT switch can be used even in the ON Position of the F. LOCK switch. The F. LOCK indicator will light when the F. LOCK switch is ON.

4 0 M . R (Memory Recalll Switch

Memory channel is called out when this switch is turned ON. For the channels in which frequencies are not stored, the corresponding channel numbers are indicated.

3-2. REAR PANEL

1430 MHz ANT (antenna) Connector IN type) For connection of the 430 MHz band antenna.

2144 MHz ANT (antenna) Connector (M type) For connection of the 144 MHz band antenna.

3Heat Sink

Dissipates heat from the final Stage transistors and power supply transistors.

4 C W K E Y Jack

This jack is used for operating the transceiver in CW mode. Connect a telegraph key using a 2P plug.

5 SP (Extemal Speaker) Jack

Connect an external speaker of 4-8 ohms impedance using the supplied plug.

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