ATV
repeater F5ZGN
Aigoual
Mount
Place of installation: Aigoual mount, altitude 1565 m
Administrative person in charge
F5AD
Take part in its operation: F1FCO, F5AD and F6BES
Video
sources:
- Input 2320 MHz horizontal
polarization from Nimes
- Input 1255 MHz horizontal
polarization from Nimes
- Local test card with call
sign
Emission
1255 MHz:
- Frequency 1255 MHz
- Sound sub carrier on 6,5 MHz
- Power 12 W
- Antenna: Quadruple quad on
printed circuit in front of a reflector
- Horizontal polarization
- Direction towards Nimes
Emission
10310 MHz:
- Frequency 10310 MHz
- Sound sub carrier on 6,5 MHz
- Possible retransmission of
sound 144,575 on sub carrier
- Power 150 mW
- Antenna: horn 17 dB
- Horizontal polarization
- Towards Nimes
Reception
2320 MHz:
- Antenna: quadruple quad on
printed circuit in front of a reflector
- Inter digital filter, and
standard Arabsat converter at the antenna
- Receiver built around a
satellite converter
Reception
1255 MHz:
- Antenna quadruple quad on
printed circuit in front of a reflector
- Preamplifier at the antenna
- Receiver built around a
satellite converter
Remote
controls:
- This repeater is operated by
remote control by DTMF on 144,575 MHz
- The code to put the test card
on 1255 is #7CD ; in this case, the 10310 sends the test
card with the sound of the 144,575 on its sub carrier
- The code to retransmit the
1255 input to 10310 is #7C1
- The code to retransmit the
2320 input to 1255 is #7C2
- Emission 1255 is stopped by a
marking time at the end of thirty minutes, it is
necessary to start again by #7CD #7C1 or #7C2
- One can stop the transmission
before the end of marking time by command DTMF #7C0
Uses:
- This repeater with regional
coverage receives ATV transmissions on 1255 from Avignon
to Narbonne and returns them on F5ZEI (F6BES) where they penetrate in the network
- It retransmits on the same
area the emissions of the network coming by F5ZEI
- The users in the axis Aigoual
Nimes Marseilles can use 2320 input and 10310 output to
be transposed directly at mont Aigoual on 1255
Projects:
- The remote control will be
modified to be in conformity with that of the network only at the time of a heavy
intervention (disassembling and return in Nimes)
- The frequency of remote
control would remain 144,575 MHz
- Codes DTMF would always start
with #7 (four codes in all)
The maintenance actions on the Aigoual mount are always an
interesting experiment, especially in winter like here, where one
sees Pierre F1FCO directing the radome; minus 1 degree Celsius in
the fog and the wind blew with more than 100 km/h (figures of the
station weather)
It was in October, we finished a little before midnight...
Ways,
frequencies, adjacent nodes, polarizations
in the
final network
Site 7 (Aigoual) |
F5ZGN |
Transmitter |
Receiver |
Code |
Fréq. |
Dest. |
Pol. |
Code |
Freq. |
Orig. |
Pol. |
With |
1255 |
Users |
H |
1 |
1255 |
Users |
H |
D |
10310 |
F5ZEI |
H |
6 |
2320 |
Users |
H |
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6 |
2320 |
F5ZEI |
H |
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9 |
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Call sign |
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Possible commands in the final
version: #7A1 #7A6 #7A9 #7D1 #7D6 #7D9
References on
1255 MHz 2300 MHz 10 GHz
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©
1999-2011 A. Ducros F5AD