Satellite Notes - Icom IC-820H Instruction Manual

35
10 SATELLITE OPERATION
Satellite notes
1. NEVER set the output power too high. Too much
power will shorten the satellite's life.
Set your transmit power so that your downlink
signal level is lower than the beacon's signal level.
2. Confirm a satellite's operating mode in advance
through documentation (magazines, etc.) or via
appropriate satellite tracking software. In the
wrong mode, you cannot use the satellite even if
you receive its beacon signal.
3. Preamplifiers may be necessary to receive satellite
signals. Optional AG-25 and AG-35 are available
to connect to the IC-820H (see p. 52).
Hi Operation
@) Set the antenna direction for the desired satellite.
(2) Select the satellite mode on the transceiver.
- Push [FUNC] then [DOWN-REV] or [UP-NOR] to
select reverse tracking or normal tracking, respec-
tively. (Most satellites can be used with reverse
tracking.)
- When [DOWN-REV] or [UP-NOR] is pushed and held
in the above step, the selected frequencies and
modes can be used in the satellite VFO.
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Appears when reverse tracking is selected.
(3) Select a mode on the transceiver.
Reverse tracking type LSB (or CW)
Normal tracking type USB (or CW)
Another operating mode may be required for digital mode
operation.
(4) Set the downlink frequency (sub band) to the
beacon frequency.
- Refer to a ham magazine or book for detailed infor-
mation.
- Adjust the antenna direction so that the S-meter
swings to its strongest level.
- The S-meter level should be noted for transmit
power selection during a loop test.
. When you use a reverse tracking satellite in SSB
mode, use LSB for the uplink frequency and USB
for the downlink frequency.
- When using a normal tracking satellite in SSB mode,
use USB for both the uplink and downlink frequencies.
(1) Decide on a usable satellite.
(2) Confirm the approximate location of the satellite
and operating mode (e.g. "B," "J," etc.) through
documentation (magazines, etc.) or via appro-
priate satellite tracking software.
(©) Perform a loop test.
- Set the downlink frequency (sub band) to an empty
frequency within the satellite's coverage.
- While pushing [RIT %]J] and transmitting a single tone
such as a whistle, set the uplink frequency (main
band) to find your downlink signal and monitor your
own signal correctly.
The sub band frequency disappears
while pushing [RIT J].
NOTE: To avoid excessive power, set the
output power so that the downlink signal
strength is lower than the beacon's strength.
4
©) Set the desired frequency to begin your satellite
communications.
-Both the downlink and uplink frequencies are
changed simultaneously.
@ When your downlink audio drifts (Doppler effect),
adjust the uplink frequency (main band) only.
-While pushing [RIT- [MJ], rotate the tuning dial to
change the uplink frequency only.
-When a particular station's audio is off frequency,
use the RIT function (push [CALL (Rif).
To exit satellite operation, repeat step @).
~ Push [FUNC] then [DOWN-REV] or [UP-NOR].
- The main and sub band frequencies can be trans-
ferred when pushing and holding [DOWN-REV] or
[UP-NOR] on this step.
CONVENIENT:
As the transceiver has 10 satellite memory chan-
nels, once set the desired satellites frequencies
can be recalled instantly.