some questions
886 8 2018-7-19
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djiuser_Tn5ukvi4k0XA
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Israel
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hello guys.I wanna buy the DJI SPARK and I have some questions to complete the Purchase.
I need the answers fast beacause I can't buy the Spark without them.
1. What Is the bandwidth in KHz?
2. What is the modulation (like QAM, FM)?
3. What is the Frequency domain?
4.What is the Low frequency and the high frequency?
5. What is the international confirmation number?

please I need help.
Thanks you so much

2018-7-19
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DMX_MT
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Malta
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Hello Mate, here are the Answers -

1. What Is the bandwidth in KHz? 2.4GHz and 5.8GHz
2. What is the modulation (like QAM, FM)? GPS / WIFI
3. What is the Frequency domain? ---
4.What is the Low frequency and the high frequency? WIFI 2.4GHz & WIFI 5.8GHz
5. What is the international confirmation number? ---

Hope you can Buy a New Spark and start Enjoying the World of Drones.


2018-7-19
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djiuser_Tn5ukvi4k0XA
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DMX_MT Posted at 2018-7-19 07:02
Hello Mate, here are the Answers -

1. What Is the bandwidth in KHz? 24,650  45,600 >= 54775

Thank you vary much!!
You helped me a lot!
2018-7-19
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DMX_MT
First Officer
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djiuser_Tn5ukvi4k0XA Posted at 2018-7-19 07:24
Thank you vary much!!
You helped me a lot!


You are Very Welcome Buddy !

2018-7-19
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djiuser_Tn5ukvi4k0XA
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DMX_MT Posted at 2018-7-19 07:29
You are Very Welcome Buddy !

Can you please clarify about the frequency domain? I need to know the range (like 72.07MHz-75.990MHz or 181.00MHz-182.00MHz etc)   
2018-7-19
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DMX_MT
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djiuser_Tn5ukvi4k0XA Posted at 2018-7-19 07:38
Can you please clarify about the frequency domain? I need to know the range (like 72.07MHz-75.990MHz or 181.00MHz-182.00MHz etc)

Of course I will give you some Information to use -


I read that in FCC mode there isnt so much difference between 2.4GHz and 5.8GHz.

In CE mode there is a lot although the db Power Gap seems small its actually about x4 as much more in FCC.

DJI Spark range settings (taken from the DJI website):

2.412 – 2.462 GHz (unobstructed, free of interference)
FCC: 1.2 mi (2 km); CE: 0.3 mi (500 m)

5.745 – 5.825 GHz (unobstructed, free of interference)
FCC: 1.2 mi (2 km); CE: 0.18 mi (300 m)

If you have 1-13 Channels you are EC, if you have 1-11 Channels you are FCC mode. These are the 2.4GHz.


2.4GHz best for long distance as Wave is LONG WAVE (Long Distance Eg. Repeaters)
5.8GHz best for short distance as Wave is SHORT WAVE (Under 200m Range Eg. Indoor Wifi)

The other problem we have in EU is that 2.4GHz has a lot of traffic and the 5.8GHz is not supported a lot like in the US.


Also this may help you -

The transmitter power is the same for both. Antennas and encoding make the difference.

The specs say: Spark:

Transmitter Power (EIRP)        

2.4 GHz
FCC: ≤26 dBm; CE: ≤18 dBm; SRCC: ≤18 dBm; MIC: ≤18 dBm

5.8 GHz
FCC: ≤28 dBm; CE: ≤14 dBm; SRCC: ≤26 dBm; MIC: -

The dBm in CE is ridiculous !
The dBm between FCC and CE at 2.4GHz is 8dBm that makes a difference from EC - 500m to FCC - 2000m range.
The dBm between FCC and CE at 5.8GHz is 14dBm that makes a difference from EC - 300m to FCC -  2000m range.


2018-7-19
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djiuser_Tn5ukvi4k0XA
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DMX_MT Posted at 2018-7-19 07:46
Of course I will give you some Information to use -

Tank you so much! I bought the SPARK now!
2018-7-19
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DMX_MT
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djiuser_Tn5ukvi4k0XA Posted at 2018-7-19 08:31
Tank you so much! I bought the SPARK now!


Hope you enjoy your Spark. Happy Flying !

2018-7-19
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DJI Stephen
DJI team
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Hi. Thank you for choosing DJI Spark as your next Drone. If you have additional questions please feel free to post it here at DJI Forum for us to help you further. For additional information about the DJI Spark I will be posting the official DJI link for the DJI Spark for reference.

https://www.dji.com/spark?site=brandsite&from=nav
2018-7-20
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