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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
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.
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
145.88
to
145.92
29.360
to
29.400
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
7
Ib
R
03
Cl
*
10
5
9’
4
2
Fig. 20 AUX Socket
Terminal
NO.
Symbol Application
1
NC
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.
*
B
or
J mode are received by LSB mode.
Table 5
20