Mittwoch, 16. März 2016

Vortex 250 Cams (Cmos vs CCD), VTX Power and Graphene Batteries

Here you will see how to swap the stock CMOS FPV cam, true Video Transmitter output power and battery considerations.



►Stock FPV Cam (Fatshark vs. AOMWay vs. HS1177m)
Not totally happy with the video image on my goggles - on hard light conditions (flying in shadow, near ground and have well lit parts will end in overexposed parts where you see NOTHING!

►Video TX mw power at different CH
I also did some measurements with the IRC RF Powermeter. No idea how exact the readings are. I learned that the VTX is heating up and the heat affects the MW power output. So all thoes measurements are from the 2nd series (I had it running there on the bench for 20-30 mins for sure. The base of the copter got pretty warm - hope the VTX survived this :)
I'm quite sure that those 40ch TX have a sweet spot around some specific frequencies and deliver more output there.
All measured at HIGH (not low or auto).

Test-Setup:
OSD FW: 1.0.0.25    FC FW: 2.1.6 BTFL (Stock)
Measured with ImmersionRC RF Powermeter
30db Attenuator and direct connection

IRC Band - ch with mw:
1: 352 | 2: 327 | 3: 306 | 4: 288
5: 279 | 6: 270 | 7: 262 | 8: 246

Raceband:
1: 469 | 2: 421 | 3: 406 | 4: 365
5: 327 | 6: 300 | 7: 270 | 8: 215

Boscam E:
1: 378 | 2: 406 | 3: 437 | 4: 453
5: 230 | 6: 225 | 7: 198 | 8: 164

Boscam B:
1: 392 | 2: 365 | 3: 327 | 4: 316
5: 297 | 6: 288 | 7: 279 | 8: 262

Boscam A:
1: 279 | 2: 297 | 3: 306 | 4: 327
5: 339 | 6: 352 | 7: 378 | 8: 392


►Links to the products:
Aomway CMOS 700TVL Camera (PAL) for FPV   
Fatshark CMOS 700tvl
Surveilzone CCD "Minicam" HS1177m
Battery: Turnigy Graphene 1800mah 4cell, 65c, 240gr
I will tell you my flight experience with these in a follow up video!

Keine Kommentare: