I tested my camera and vtx w/o using FC.Works great.
  I have a tbs unify Pro HV and Foxxeer T-Rex and am using Hobbywing G3 stack.
 The vtx will accept 2-6S and camera 4.5-16 volts.
  I have wired up several air unit and Caddx vista to HW G3 stack but not analog.
 
 Here’s a diagram and I see several ways to wire up the FPV system.Directions with vtx and cameras don’t mention using FC and I see several ways to wire up FPV system so I’m a bit confused what would give the cleanest video signal.

 With tbs unify Pro HV I can power it using the 12 volt BEC or vbatt.If I use vbatt I could power camera up using 12 volt bec but vtx has a 5volt filtered supply for camera.
  I don’t know whether to use vbatt and 12 volt bec for camera or just use vbatt and vtx 5volt bec on camera or should I be using a FC pad to power up camera ?

Order of best to worse.

VTX 5V
FC 5V or specific camera power source on FC. Usually 7v, 9v or 12V
VBAT only if you are using 4S or less. Otherwise you will burn the camera.

Thanks,
I’ll probably just wire it up as per diagram or power Vtx with vbatt and camera with the 12volt bec.

The 12volt 2amp bec on FC has been very reliable with my Caddx vista and air unit so I don’t see any problem using it to power both as diagram.
If Vtx needs more power I can always more wire to vbatt.

Here’s the diagram.
 I had it posted in the beginning but maybe it didn’t upload.

 Just for reference I’ll post diagram.
 
 

I went with powering vtx with vbatt and camera with 12 volt bec on FC.
The unify pro hv can handle 2-6S and I’m going to try both ways and see if I can tell any difference.
I have the FPV system and receiver soldered up to FC tested both and next will be soldering motors up to 4n1.
I am hoping I can control Vtx settings with transmitter.

(07-Mar-2021, 04:30 PM)Rob3ddd Wrote: I went with powering vtx with vbatt and camera with 12 volt bec on FC.
The unify pro hv can handle 2-6S and I’m going to try both ways and see if I can tell any difference.
 I have the FPV system and receiver soldered up to FC tested both and next will be soldering motors up to 4n1.
I am hoping I can control Vtx settings with transmitter.

  So far no real problems with vbatt except I have noticed a bit of fuzz after a punch out some light colored wavy lines.
 Behind trees I’m getting a bit of  fuzz but as soon as I pass back to clear.
 I’m going to try running vtx on the 12 volt bec from FC and see if it’s any different.

(30-Mar-2021, 05:35 AM)Rob3ddd Wrote:   So far no real problems with vbatt except I have noticed a bit of fuzz after a punch out some light colored wavy lines.
 Behind trees I’m getting a bit of  fuzz but as soon as I pass back to clear.
 I’m going to try running vtx on the 12 volt bec from FC and see if it’s any different.

I assume you have an appropriately sized capacitor on the lipo battery pads? I have had wavy lines in the video feed during punch outs on a quad where the 470uf capacitor was not adequate enough and I had to put a 1000uf to deal with the noise in the video.

Fuzz behind trees is normal as the 5.8 ghz analog signal always struggles through anything with water/moisture.

(31-Mar-2021, 10:19 AM)kafie1980 Wrote: I assume you have an appropriately sized capacitor on the lipo battery pads? I have had wavy lines in the video feed during punch outs on a quad where the 470uf capacitor was not adequate enough and I had to put a 1000uf to deal with the noise in the video.

Fuzz behind trees is normal as the 5.8 ghz analog signal always struggles through anything with water/moisture.

  I’m using 4S currently and the cap that came with HW G3 stack 60amp 4n1.
  I think I’m being over picky on the wavy lines for it’s barely noticeable unless you start looking.
  I switched to diversity mode and it went away.Mix mode seems to boost power and colors but it creates more noise.