Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Terrible range on FPV Set Up - Please Help

Discussion in 'Phantom 2 Discussion' started by neiloakley, Mar 20, 2014.

  1. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    So my set up is a P2, with Zenmuse H3-2D, Mini iOSD, Boscam FPV 5.8G 400mW AV Transmitter Module TS353 from Banggood, 5.8G 3 Leaves Omnidirectional Gain Antenna For Transmitter from Banggood and FPV 5.8G 7 Inch LCD Monitor With Built-in Battery & 5DB Antenna also from Banggood.

    With this setup (first time trying it last night) I went to 100m height directly above me, as well as 100m distance at 30m height and by that point the video was breaking up to the point it was not legible on the monitor.

    I have the cloverleaf antenna on the video TX, and i tried it at 90 degrees to the horizontal, 45 degrees and fully horizontal.

    I also tried the receiver antenna vertical, perpendicular to the P2 position and fully horizontal but nothing seemed to make much difference.

    Any thoughts what could be obviously wrong? Should I try the stock antenna on the video TX, or do I need cloverleaf on both ends to see any benefit?
     
  2. rilot

    Joined:
    Aug 18, 2013
    Messages:
    842
    Likes Received:
    5
    Location:
    Twyford, UK
    Make sure that your antennas are the same connector as your vtx / vrx. There are RP-SMA and RMA versions which will accept either antenna but the centre pin will be wrong. Just make sure that if you have an RP-SMA vrx (pin in the middle) that your antenna is also RP-SMA (hole in the middle).

    A few people on here have used SMA antennas with RP-SMA vrx and it doesn't work as the centre pin doesn't contact.
     
  3. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    The receiver is still using the standard antenna, so no issue there.

    The Video TX has an SMA male socket and i'm using an RP-SMA female cloverleaf antenna. that should work right?

    [​IMG]

    [​IMG]

    [​IMG]
     
  4. CJ31

    Joined:
    Jan 27, 2014
    Messages:
    235
    Likes Received:
    0
    Location:
    Northern VA
    You've obviously made sure that you're on the same channel right? I have the exact same setup (although I've only used the stock antennas so far) and it works good. I've got my tx set on channel 8 right now which corresponds to C8 on the monitor. It has worked well, but was going to do some tests on other channels to see what is best.

    btw - for the tx channel guide, the position of the black squares shows the position of the dip switch, not the white. Since the switches are white, I was a little confused about that at first.
     
  5. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    The monitor didn't come with any instructions, and only three dip switches on the back, not the usual four. Any ideas? Bang good website has no instructions and google is not coming up with anything
     
  6. CJ31

    Joined:
    Jan 27, 2014
    Messages:
    235
    Likes Received:
    0
    Location:
    Northern VA
    I guess you have a different monitor than me. I got the LCD5802 diversity monitor from banggood. It came with a chart of frequencies and I just matched it up with the same frequency as the vtx. Which monitor is it? Maybe email banggood and see if they have a chart. It takes a day, but they have always responded to my emails.
     
  7. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    Yeah that was my last option so I've now emailed them. Will let you know what they come back with
     
  8. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    Still nothing - I missed the opening times of their online chat this morning too so going to have to hope they reply overnight.
     
  9. CJ31

    Joined:
    Jan 27, 2014
    Messages:
    235
    Likes Received:
    0
    Location:
    Northern VA
    They just sent me an email last night that they were sending a replacement antenna because the one I got was the wrong sma.

    For your setup, have you tried just putting the 1st 3 dip switches on the monitor and 1st 3 of vtx in the same positions? I have no idea if that would match them up, but it's worth a try. I read somewhere that the 4th dip switch sometimes does not matter. Again no idea if that's accurate.
     
  10. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    Just received this picture from Banggood. Will try it tonight and see if it improves things.
     

    Attached Files:

  11. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    I can now get 200-250 meter range. But i want more as when i get to that range, turning around can cause blue screen.

    I have the cloverleaf antenna on the Tx from Banggood, what is a simple and relatively cheap Rx antenna solution in the UK that will work with the cloverleaf on the Tx?
     
  12. scratch009

    Joined:
    Mar 13, 2014
    Messages:
    33
    Likes Received:
    0
    Helical turn antenna probably will give you biggest range. I get 1km range with a boscam ts351 (200mw) and 9dbi (wifi router) antenna on receiver and transmitter side. I would expect bigger range then 200 meter. You haven't powered up the transmitter without antenna by any chance (could fry the inside of the transmitter).
     
  13. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    Helical turn? french to me :) Should i just take the aerials off my wifi router at home lol

    And no, always been careful to never power on without antenna. I never need to take the antenna off anyway.
     
  14. goldfishrock

    Joined:
    Jan 7, 2014
    Messages:
    427
    Likes Received:
    0
    Location:
    Devon, UK
    IBCrazy 5-Turn helical
    http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=11_45_49_97&products_id=1090

    Or even a Spironet Patch
    http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=165_40&products_id=1291

    If you've got a diversity receiver you can obviously fit them both. On the transmitter put a good quality Spironet. A lot of these cheap chinese imports are not built well and the frequencies are well outside of tollerance (that photo you posted shows one of the worst in my experience!).

    http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=165_40&products_id=1539

    The key is to make sure that if you have a RHCP (Right Hand Circular Polorised) antenna on the transmitter, you need RHCP versions on the receiver. If you've got some cash to spend, take a look at a Blubeam antenna for the transmitter....

    I have the exact setup I've listed on here, both a Helical & Patch on a diversity receiver with a 250mw vTX and I am getting 1.6km+ (and that is in and amongst the rolling hills of Devon). Sure if you get out somewhere flat it'll blitz that easily.
     
  15. neiloakley

    Joined:
    Mar 17, 2014
    Messages:
    137
    Likes Received:
    0
    You sir, are a legend!

    Thank you
     
  16. d4ddyo

    Joined:
    Mar 11, 2014
    Messages:
    889
    Likes Received:
    0
    The patch antenna looks interesting. Does the antenna have to be pointed perpendicular to the transmission like a radar dish?
     
  17. poostik

    Joined:
    Feb 11, 2014
    Messages:
    442
    Likes Received:
    1
    Location:
    NJ, USA
    Will different channels make a difference? I thought they were just there so you could differentiate from others if you were flying at the same time.

    I know I don't have the best FPV system but mine seems to be cutting out way more than a friend of mine who has the same one.

    I get static even when it's 50ft away :-/
     
  18. GhostMaster

    Joined:
    Dec 7, 2013
    Messages:
    793
    Likes Received:
    36
    Yes makes difference..

    Output power: http://i.imgur.com/JAZiz9L.jpg
     
  19. GhostMaster

    Joined:
    Dec 7, 2013
    Messages:
    793
    Likes Received:
    36
    Here is a very cheap FPV setup, you can get 1km+ range with this setup, its a nice start to FPV.
    And if you use a directional antenna on the receiver you could go above 2km.

    Boscam TS351: http://j.mp/1iwjZzR
    Boscam TS353 400mw: http://j.mp/1gJ6t7s
    Boscam receiver RC305 5.8Ghz: http://j.mp/1cRoJjy

    RC305 + TS353 combo: http://j.mp/1iuhzQ6

    Antennas (circular polarized)
    cloverleaf antenna to rx: http://j.mp/1arIRFU
    Cloverleaf antenna to tx: http://j.mp/1dG8kbW

    7" LCD: http://j.mp/1d7kwsr
    Boscam 7" RX-LCD5802 5.8GHz Diversity Receiver: http://j.mp/1lZuham

    Just to show how well this setup works here is a video i found on youtube (4.6 km on minute 8:14), in the description is the setup used, and you can read RC305 and TS351, just like this setup:
    http://www.youtube.com/watch?v=7pkYzuNXp_c
     
  20. poostik

    Joined:
    Feb 11, 2014
    Messages:
    442
    Likes Received:
    1
    Location:
    NJ, USA

    So does the higher number = better/stronger signal?