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
A mode:
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
J mode: 2 m- 70 cm.........Repeater up-link transmitter
o r
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.
Cross type
OSCAR satellite
(A mode)
Yagi antenna
for DX QSO
Microphone
Transmit only
Receive only
Fig. 19 Example of OSCAR Operation
Up-link
frequency
Down-link
frequency
Beacon
frequency
OSCAR No. 7
OSCAR No. 8
RADIO
No. 1, 2
(2m-10m
1 4 5 . 8 8
to
1 4 5 . 9 2
2 9 . 3 6 0
to
2 9 . 4 0 0
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 k n o w l e d g e s , y o u w i l l b e a b l e t o e n j o y
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
7
0
3
5
2
Fig. 20 AUX Socket
Terminal
N O .
Symbol
Application
1
N C
Open terminal
2
E43
8 V DC 10 mA (430 MHz)
3
ELC
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.
* B or J mode are received by LSB mode.
Table 5
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