Kenwood TS-780 manual 5-10OPERATION OF 2 VFOs, 5-11USE OF FM-CH, 5-12USE OF F. STEP SWITCH

The VFO Knob is of variable torque type. When the lever at the left of the knob is set to NORM, the knob can be rotated quickly because of the flywheel effect. When the lever is set to TIGHT, the knob is given a heavy torque and hence the knob will not rotate accidentally by external shock. This feature is useful for fine tuning or mobile opera- tion.

5-10 OPERATION OF 2 VFOs

The TS-780 has two VFO’s, A and B, each being con- trolled by a microprocessor.

By using the FUNCTION switch, the desired VFO can be

selected. The use of two VFO’s also permits Operation with

their own frequencies (Cross		channel			Operation)		such as
A-R or B-R Operation. The	table		below		Shows the		positions
of the FUNCTION switch	and		VFO’s		selected.
The two VFO’s (A and	BI	can		be	operated	in	different
bands (for example, VFO	A:	144		MHz, VFO B:		430 MHz;

or in the same band. They can also be used as a memory. Examples:

1 . With your contact’s schedule frequency	stored	in VFO
B, you can operate VFO A until your	contact	Starts
transmitting.

2.During FM Operation, you can locate a sub-channel and shift the frequency for repeater Operation by the VFO not in use.

FUNCTION	R E C E P T I O N	TRANSMISSION
SWITCH

When the MODE switch is changed to or from FM-CH

Position, the operating frequency becomes as shown table

3.

Frequency	145.317.7	145.317.6		145.315.0	145.315
displayed
	145.312.5	145.315		145.315.0
	(NOTE: "1)	(NOTE:	'2)
		Table	3

Note 1:

*1 When the F. STEP switch is turned OFF, the frequency will shift to the nearest 12.5 kHz step frequency

within the displayed frequency.

*2 When the F. STEP switch is turned ON, the frequency will shift the nearest 5 kHz step frequency within the displayed frequency.

The 100 Hz digit disappears.

Note	2:
Table	3 Shows the frequencies	of VFO A. In the FM-CH
mode,	the frequency of VFO B is shifted in the same way.
In the	SSB mode, the frequency	bellow 10 kHz Order may

be changed.

Table 2

5-11 USE OF FM-CH

With the MODE switch set to FM-CH Position, the VFO

Operation changes to click type. In the OFF Position of the

F . STEP switch, the channel frequency shifts up in

12.5 kHz Steps, and	in the ON Position, in 5 kHz Steps.
4 3 3 . 0 0 0	4 3 3 . 0 0 5
4 3 3 . 0 1 2 5	4 3 3 . 0 1 0
4 3 3 . 0 2 5 0	4 3 3 . 0 1 5
4 3 3 . 0 3 7 5	4 3 3 . 0 2 0
4 3 3 . 9 8 7 5	433.995

5-12 USE OF F. STEP SWITCH

This switch is used to Change the step of VFO frequen- cy. By pressing the switch, the F. STEP LED will light. In the SSB, CW or FM mode, this switch should be set to OFF, except when the tuning knob is used. When the switch is set to ON, the frequency on the 100 Hz Order becomes even number and the frequency on the 10 kHz Order is cleared to “0”. The frequency remains the same when the switch is set to OFF.

Table 4

5-13 USE OF MEMORY

This switch is used to store the desired frequency in the memory. The frequency is stored in the channels (1-1 0 ch) by using the M switch and MEMORY selector. The stored frequency is called out by pressing the MR switch to ON.

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