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Twin receivers for best reception.
Automatic antenna switching.
Calibrated receivers for seamless
switching between antennas.
Dual, buffered AV outputs.
Automatic or user configurable
low battery alarm.
Can be powered from 6‐12V, 2S or
3S LiPo battery preferred.
High bandwidth stereo‐audio.
Single button operation for
channel selection.
Visual indication of selected
antenna.
Twin female SMA antenna
connectors.
FM Audio/Video Modulation.
‐85dB typical sensitivity.
50 ohm antenna impedance.
1Vpp Video output level.
3V pp Audio output Level.
Small, light weight, durable,
anodized aluminum casing.
Weight: 195‐grams.
Size : 82 x 105 x 26 mm.
www.immersionrc.com
Duo 2400 Diversity Receiver
Twin receivers for best reception
Conventional receivers have one big drawback, they only allow for a single
antenna to be connected. If for some reason the reception fails there's no
backup and you lose the signal. Not so with the Duo 2400 diversity
receiver. With its twin receivers it allows you to hook up two antennas
and the microcontroller inside will automatically switch to the receiver
with the strongest signal, without any switching noise or a change in the
image received.
With ‐85dB sensitivity per receiver the Duo 2400 is sensitive, very
sensitive. Paired with two flat patch antennas it will give you many
miles/kilometers of range. It is engineered from an FPV‐er's perspective
and hence has features to match. It'll warn you when the receiver battery
runs low, or when switching antennas. The diversity receiver works best
with either a 2S or 3S LiPo battery and the low voltage warning can be set
accordingly, either automatically, or user configurable.
Equipped with two buffered AV outputs it allows you to connect your
goggles, as well as your recording device, without the need for Y‐cables or
a signal splitter. Operating the Duo 2400 Diversity Receiver couldn't be
simpler. After applying power it'll beep the number of LiPo cells it has
detected and sets the low voltage warning to match. Selecting channels is
a breeze; four channels according to the frequencies used by Airwave and
another six as used by Lawmate are available with the press of a button.
ImmersionRC – Real Virtuality
info@immersionrc.com
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Summary of Contents for ImmersionRC Duo 2400
- Page 1 Duo 2400 Diversity Receiver Twin receivers for best reception. Automatic antenna switching. Twin receivers for best reception Calibrated receivers for seamless switching between antennas. Conventional receivers have one big drawback, they only allow for a single Dual, buffered AV outputs. antenna to be connected. If for some reason the reception fails there’s no Automatic or user configurable backup and you lose the signal. Not so with the Duo 2400 diversity low battery alarm. receiver. With its twin receivers it allows you to hook up two antennas Can be powered from 6‐12V, 2S or and the microcontroller inside will automatically switch to the receiver 3S LiPo battery preferred. with the strongest signal, without any switching noise or a change in the High bandwidth stereo‐audio. image received. Single button operation for channel selection. With ‐85dB sensitivity per receiver the Duo 2400 is sensitive, very Visual indication of selected sensitive. Paired with two flat patch antennas it will give you many antenna. miles/kilometers of range. It is engineered from an FPV‐er’s perspective ...
- Page 2 Operating the Duo 2400 Diversity Receiver Operating the receiver is simple, as a single push‐button allows for switching channels as well as setting up user configurable settings. After applying power, and provided the ‘auto’ setting for the low voltage warning is selected, it’ll beep the number of LiPo cells it has detected. So two beeps indicate a 2S LiPo and the low voltage warning is set to 6V, three beeps indicate a 3S LiPo and the low voltage warning is set to 9V. The Duo 2400 Diversity Receiver has 10 channels it can tune to; four of these are reserved for Airwave audio/video transmitters and six for Lawmate audio/video transmitters. It’ll cycle through these 10 channels with each press of the button. Airwave channels are indicated with a single beep, Lawmate channels with a double beep. When switching to Lawmate channels there’ll be a long double beep for the first Lawmate channel, with subsequent channels having short double beeps. When switching to Airwave channels there’ll be a long single beep, with subsequent channels having a short single beep. The last chosen channel is stored and will be tuned to at power up. When the low voltage battery alarm is triggered the receiver will start to beep indicating you need to charge or change the battery. Furthermore it’ll also beep when the input voltage is too low, less than 5V or too high, more than 13V. At voltages less than 5V it will not work reliably, at voltages over 13V it will run hot over a longer period of use, so this is not recommended. The power input is reverse polarity protected, however it is good practice to always check polarity prior to applying power. The Duo 2400 diversity receiver power connector is center pin positive, which seems to be the norm. Programming the Duo 2400 Diversity Receiver The Duo 2400 Diversity Receiver can be configured to store user selected configuration settings. The selected channel will always be stored so at power up it defaults to the last selected channel. Other settings that can be configured are: • Low voltage alarm threshold • Rx Switch Tick enable/disable •...
- Page 3 Beep Code Menu Menu Choices Low Batt Volts 1 – Auto (for 2S or 3S LiPo)* 2 – 6v 3 – 7v 4 – 8v 5 – 9v 6 –10v 7 – 11v 8 – 12v Default: 6V for 2S, 9V for 3S - . . Low Batt 100mV 1 – 0.0v …. 10 – 0.9v Default: 0.5v (for threshold of 9.5v) (Ignored in Auto mode) Rx Switch Tick 1 – Tick Off - . . . 2 – Tick On * Hysteresis # beeps * 5dB - ..Default: 1 = 5dB Note that * indicates the default value . www.immersionrc.com info@immersionrc.com ...
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Page 4: Antenna Selection
Low Battery Volts Low Battery 100mV These two options can be combined to set the threshold at which the low‐voltage alarm sounds. In Auto mode (the default), the receiver will sense the attached battery voltage, and will set the alarm voltage accordingly (6V for 2S and 9V for 3S LiPo). This mode is designed only for use with LiPo batteries. For use with NiCD, NiMh, or other batteries, set the alarm voltage manually, for example: 9.2v set LowBattVolts to 5 (9v), and LowBatt100mV to 3 (0.2v) 10.0v set LowBattVolts to 6 (10v), and LowBatt100mV to 1 (0.0v) When powering the receiver from LiPo batteries, it is important to note that the discharge curve is fairly flat, and drops off quickly near the end. Setting a threshold of around 3.0/cell is relatively safe. It is however highly recommended to perform a ‘dry‐run’ after setting the voltage warning threshold to make sure the low battery warning is set up correctly. If upon connection of a battery pack the receiver beeps continuously then the low battery warning is set higher than the voltage from the battery pack, so reset accordingly or charge the battery pack. Note that regardless of the low battery alarm settings, a fixed alarm will occur when an input voltage smaller than 5V or larger than 13V is detected. This safeguards the receiver from being used with input voltages with which the correct operation cannot be guaranteed. Safety Note: Even though this alarm will provide some protection against loss of video signal during an FPV flight, it is highly recommended to fully charge all battery packs used before each and every flight. Hysteresis The hysteresis control is used to prevent unnecessary receiver switching when the difference between their signal‐strengths is minimal, for example when flying close by. The default value should be reasonable in most applications. Antenna Selection The diversity receiver can be used with standard 2.4GHz antennas, equipped with a male SMA connector. The idea behind the use of two antennas is to prevent nulls due to multipath interference. A combination of antennas can be used for optimal signal reception. Two small 8dBi flat patch antennas provide a good compromise for most, but two different antennas can also be used to fill in any nulls, for example a low gain 3dBi and a high gain 11dBi omni‐directional antenna. www.immersionrc.com info@immersionrc.com ...
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