REPLACE FUSE AS
- RISK OF FIRE -
MARKED AFTER
DISCONNECTING UNIT
- RISQUE D'INCENDIE -
REMPLACEZ FUSIBLE DU
TYPE INDIQUE APRES
DEBRANCHER DU SECTEUR.
CAUTION:
ATTENTION:
A N T E N N A 2
R E C E I V E O N L Y
V H F / U H F
I N T E R F A C E
R S - 2 3 2 C
F A X /
I N P U T
E X T E R N A L
T N C
D C I N P U T
1 3 . 6 V D C 6 A
+
5 0 / 6 0 H z
7 5 W A T T S
115 OR 230 VAC
SET INTERNALLY
FACTORY SET : 115 V
L I N E
F U S E
1 1 5 V
2 3 0 V
3 A , 2 5 0 V
S L O - B L O
T 1 . 6 A , 2 5 0 V
+ 13.6VDC
@
100 mA
F R O M A C L I N E .
+
G N D
S W I T C H E D
+ 13.6 V
5 0
@
FUSE
A N T E N N A 1
R E C E I V E : V H F / U H F
5 0
T R A N S M I T : 1 4 4 - 1 4 8 M H z
2 5 W A T T S
M A D E I N U . S . A .
BY
R
8
E X T S P K R
D E M O D
Mast
A Z
E L
2 Meter Beam
Antenna
Contains controller circuits
and firmware to calculate
AZ/EL (from Keplerian
coordinates) for proper
antenna aiming to track
satellite.
To
Satellite
AZ/EL Motorized
Antenna Mount
Controller
Receive Transmit
SETUP #01 - set
to '1':
+13.6VDC
Enabled to
power
Preamp.
TR270 Transceiver
For serious satellite operation, an antenna tracking
system is required. Typically, this type of setup consists of
two beam type antennas, one for the uplink (2 meters)
and one for the downlink (70 cm). The downlink an-
tenna typically also includes a mast mounted, low noise
preamplifer. These antennas are co-located on a
common mast to which an elevation rotor is attached.
This entire assembly is attached to an additional azimuth
rotor. See Figure 11. With this antenna arrangement,
complete horizon-to-horizon tracking of the satellite is
possible. A PC or other computing device is connected
to the elevation and azimuth rotors. The PC runs a
program which converts the particular satellite’s orbital
data (called Keplerian elements, or Keps) and either
displays the actual AZ-EL (azimuth-elevation) of the
satellite for manual tracking, or directly controls the
rotors automatically. For a further, in-depth discussion,
refer to AMSAT (Amateur Radio Satellite Corporation)
Organization at the following address:
AMSAT
850 Sligo Avenue
Suite 600
Silver Spring, MD 20910
Phone: (301) 589-6062 or http://www.amsat.org
on the World Wide Web.
FIGURE 11
70 CM Beam
Antenna
Elevation Mast
Mast Mounted
70cm Preamp
Coax carries
signal and
+13.6 VDC
power to
preamplifier.
Coaxial Cables
32 Satellite Operation, continued
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