Kenwood TS-780 manual 5-20OSCAR OPERATION, 5-21AUX SOCKET

5-20 OSCAR OPERATION

At present, two amateur radio communication satellites (No. 7 and No. 8) are travelling along the Orbit of the earth (No. 6 is not available because the battery power has been exhausted). These satellites can be used as your repeater. The TS-780 will function when used with the satellites as follows.

[OSCAR No. 71

Amode: 2 m - 10 m . . . . . . . . . . Repeater up-link transmitter

B mode: 70 cm- 2 m.........Repeater up-link transmitter

or Repeater downlink receiver

[OSCAR No. 81

A mode: 2 m~10 m . . . . . . . . . . Repeater up-link transmitter

Jmode: 2 m- 70 cm.........Repeater up-link transmitter

or Repeater down-link receiver

[RADIO 1,2)

2 m - 1 0 m . . . . . . . . Repeater up-link transmitter

Table 5 Shows the link frequencies. An example of ap- plication of the TS-780 in 70 cm- 2 m repeater Operation is illustrated in Fig. 19.

		OSCAR satellite
Cross	type	(A mode)
Yagi	antenna

for DX QSO

Microphone
	Transmit	only		Receive only
	Fig. 19 Example of OSCAR Operation
	OSCAR	No. 7	OSCAR No. 8		RADIO
					No. 1, 2
					(2m-10m
Up-link					1 4 5 . 8 8
					to
frequency
					1 4 5 . 9 2
Down-link					2 9 . 3 6 0
					to
frequency
					2 9 . 4 0 0
Beacon
frequency

* B or J mode are received by LSB mode.

Table 5

OSCAR Operation with the TS-780 alone where the FUNCTION switch is set to A-R and the VFO A is used as a 430 MHz band receiver and the VFO B as a 145 MHz band transmitter, is not possible because the downlink Signal cannot be monitored.

In OSCAR Operation, it is imperative to use a separate transmitter and receiver so that the downlink Signal can be received as shown in Fig. 19. lt is also necessary for you to become acquainted with some special knowledges relative to the Orbit tracking of satellite, usage of beacon waves, operating manner, antenna installation, etc.

With basic knowledges, you will be able to enjoy repeater communication through the amateur satellites with little difficulty. Reference materials such asguide books and instruction books are available from market.

5-21 AUX SOCKET

This socket is used for connecting the suplied DIN con- nector to supply the following voltages to external equip- ment.

View from the rear Panel Cl

7 R Ib

0 3* 10

59’ 4 2

Fig. 20 AUX Socket

	Terminal		Symbol	Application
	N O .
	1		N C	Open terminal
	2		E43	8 V DC 10 mA (430 MHz)
1 3		/	ELC	t Extemal ALC input terminal

Transmitter operates when earthed.

Table 6

The AUX socket is used for connection to a linear amplifier, receiver booster or external standy unit. When using care should be taken so that each of the load currents at the terminals 2, 4 and 5 will not exceed 10 mA, as otherwise the transceiver may be damaged.

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