Optimal Antenna Connection
The Duo2400 was designed to be connected directly to the antenna’s RF connector with
as short a cable as possible, or ideally no cable at all.
Months of testing has shown that with this configuration, the best reception will be
obtained. You can even connect the Patch antenna directly to the Duo2400 (please be
careful not to put too much force on the SMA connectors if this mounting technique is
chosen)
Antenna Selection & Placement
The diversity receiver may be used with standard 2.4GHz antennas, equipped with a male
SMA connector. The spacing between the two antennas is not too critical on the 2.4GHz
band, even with two spiroNET antennas placed touching each other, multipathing effects
will be greatly reduced.
Frequencies
The Duo2400v3 supports 20 frequencies, spread over 4 bands. These bands correspond
to various standards commonly used in the 2.4GHz FPV world, and have some history
behind them.
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
Band 1
Lawmate
2410
2430
2450
2470
2370
2390
2490
2510
Band 2
Airwave
2414
2432
2450
2468
-
-
-
-
Band 3
International
Band
2370
2396
2410
2430
-
-
-
-
Band 4
NexWaveRF
USA (US)
2396
2396
2410
2430
-
-
-
-
Note that the ImmersionRC 700mW 2.4GHz transmitters are available (currently) in two
versions, an international version, which uses the common Lawmate frequencies (Band 1),
and a USA (Band 4, US) version, which uses three frequencies legal for use in the USA (and
legal for US retailers to ship to domestic customers)
Band 3 falls within the UK/EU Amateur radio band, and is available by special order (contact
your local retailer if you are interested in this product)
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