I'm preparing the DJI FPV systems review (my current project, lot's of fun, very interesting!).
You can already see my own notesand get a ton of info from it - or you wait until my video is finished and consume it with some popcorn...
The txt file above is a work in progress...
Antennas - for example - look like this:
First video: Latency test - see what I found while measuring it on the oscilloscope:
!DISCLAIMER! - ORT sent me some antennas for review, you can buy them here
Banggood sent the Foxeer Lollipop 3
I DONT use affiliation links - I'm not a sales guy, here you get HONEST reviews and opinions.
My test-setup:
I use 1mW on the transmitter, 5m distance to a VERY SENSITIVE receiver (Aaronia Spectran HF6065 -150dB!) and take enough samples from the -DB reading on the display to get an average.
The VTX is warmed up before the test - this way I can be sure it stays at the same output level for all antennas. This is not 100% accurate. On start I had 815uW and after 1h testing it showed 1029uW or 1mw - but this should not impact measurements too much!
Time Rank Type -dBm -dBm ant. null (or 90°sideways for directional)
00:21:32 1 dir. -45,3 -64,8 ORT Helix 6 Turn
00:20:14 2 dir. -47,4 -68,6 Circular Wireless Helix 12dB
00:18:23 3 dir. -49,3 -69,1 ORT Helix 3 Turn
00:15:50 4 dir. -50,3 -79,9 Triple Feed Patch 9.4dB
00:16:45 5 dir. -51,3 -70,1 VAS Crosshair Extreme
00:15:00 6 dir. -51,6 -68,5 Triple Feed Patch 8dB
00:09:48 7 dir. -52,2 -65,2 IRC Spironet Patch 8db
00:10:25 8 dir. -52,2 -68,2 Menace PicoPatch
00:14:17 9 dir. -53,4 -67,6 Foxeer Echo Patch
00:11:54 10 dir. -54,4 -67,7 ORT DualShield
00:11:02 11 dir. -55,9 -67,4 ORT Shield
00:03:42 12 om. -56,6 -70,2 Foxeer Lollipop 1
00:03:23 13 om. -57,5 -76,5 Aomway SPW blue
00:08:07 14 om. -57,8 -78,3 ORT 6Lobe SPW
00:07:40 15 om. -58,8 -68,6 Foxeer Long coax Pagoda pro
00:04:20 16 om. -58,9 -70,6 Foxeer Lollipop 2
00:06:55 17 om. -59,6 -80,0 ORT Pagoda
00:05:59 18 om. -59,8 -71,5 SpeedyBee Antenna
00:04:50 19 om. -60,0 -72,7 Foxeer Lollipop 2 Stubby
00:05:34 20 om. -60,0 -69,8 Foxeer Lollipop 3