guys am in a confusion to buy a 1.2ghz fpv setup or a 5.8ghz setup
as per the calculations and stuff seems that 200mw of 1.2 ghz gives more range than 5.8ghz
for eg: 600mw of 5.8ghz = 100mw of 1.2ghz
wat do i buy pls guide regards!!!

if you are going to use 2.4 GHz radio, then forget about 1.2 GHz fpv, they will disturb each other.

Depends on your requirement
If you intend to go long range choose 1.2Ghz as it can penetrate objects(you can fly behind trees,etc) better than 5.8Ghz...But you have to shift your RC band to 433 Mhz as with 1.2Ghz you'll suffer from noise in RC signal due to harmonics

If you use the 5.8Ghz band flying behind objects would be a problem...and no need of high power Tx use a high gain antenna...and for least noise you could make a DIY diversity controller using the RC305 rx or cheap rx tx modules from Banggod with helical antennas and opamps as comparator(or use an arduino)

5.8Ghz would be the lightest setup and 1.2 Ghz would be a heavier system with large TX compared to 5.8(difficult to fit into models)
Hope it helps!

Cool thanxx both so 5.8 GHz with more mW value and antennas would wrk for range

Yes if you use a 200 mW Tx with 4-5 turn helical antenna you'll get around 2 kms range(approx)
How more gain doesnot mean better FPV experience!
Keep in mind that as you increase the gain of the antenna the antenna becomes more directional(Say if you antenna is not point towards the model you may suffer from signal loss that's why with high gain antennas a diversity system(DIY is cheap) or antenna tracking system(expensive) is used)

Hello Everyone :-
@ Roy Sir :- Sir Is 1.2 Ghz Frequency Allowed in India ?? ( No Offence To anyone ) and Also Transmitter With 200 mw are allowed??Because I really didn't know about that ?
Regards,
Aman.

First of all FPV is a very controversial matter!
I don't think so 1.3 Ghz is allowed in India but still ppl import it and use it!

No Offence Sir I just asked for My knowledge but thanks for the Answer and Sorry I didn't mean to Hijack your topic.
Regards,
Aman.

Hey guys well again a doubt abt frequency I need telemetry for APM which one is better or wat is the difference between both 913 mhz and 433 MHz?

The 900 MHz band is used for cell phone communication in India so you may face a lot more interference and I think it is not permitted for unlicensed use. I am not sure about the regulations of the 433 MHz band but I think it is open for public use and used for HAM radio. Most LRS systems use 433 MHz.