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Antenna Placement

All tests were performed with all antennas pointing up

  • Xbee interference with 433Mhz band
  • Xbee levels at 960mhz band
  • orangerx 433mhz 
  • orangerx 960mhz
  • ezuhf 433mhz
  • ezuhf 960mhz
  • esc interference with 433mhz and 960mhz bands
  • gps interference with 433 and 960mhz bands
  • picpilot power supply interference iwth 433 and 960mhz bands
  • everything inside noise floor results (everything but uhf on for 433mhz test, everything but xbee on for 960mhz test)

Range checks

  • range check with dragon link powered by battery
  • range check with dragon link hooked up to esc directly
  • range check with dragon link hooked up to picpilot powered by battery
  • range check with dragon link hooked up to picpilot powered by esc
  • range check with dragon link hooked up to picpilot + esc + gps
  • range check with dragon link hooked up to picpilot + gps + xbee
  • range check with dragon link hooked up to picpilot + gps + xbee + dji
  • range check with everything inside plane ready to fly (packed in the same way as before flight, this is important to test antenna placements)

426-441 Mhz Tests (in Bay)

Noise Floor

LocationBay
Frequency Range426-442Mhz
ConditionEverything off, noise floor
RF Explorer Antenna

Not Retracted

Max Level

-64.60

Max Hold Level-80dbm
Max Level Freq441.714Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionEverything off, noise floor
RF Explorer Antenna

Retracted

Max Level

-97.7

Max Hold Level-91.70
Max Level Freq434.286Mhz
Image


Dragon Link Testing

LocationBay
Frequency Range426-442Mhz
ConditionDragon Link On, Lowest Power, 5ft away
NotesIncreasing power level created RF overload
RF Explorer Antenna

Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-18.6

Max Hold Level-18.6
Max Level Freq437.10Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionDragon Link On, Lowest Power, using provided Nagoya Antenna
NotesCaused overload because of antenna
RF Explorer Antenna

Not Retracted

TX AntennaProvided Nagoya
Max Level

-15.6

Max Hold Level-15.6
Max Level Freq437.857Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionDragon Link On, Range Test Mode, 5ft away
RF Explorer Antenna

Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-90.9

Max Hold Level-90.9
Max Level Freq433.286Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionDragon Link On, Range Test Mode, 5ft away
RF Explorer Antenna

Not Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-84.90

Max Hold Level-83.90
Max Level Freq433.143Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionDragon Link On, Range Test Mode, < 1ft away
RF Explorer Antenna

Not Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-77.60

Max Hold Level-75.60
Max Level Freq437.857 Mhz
Image

OrangeRX Testing

LocationBay
Frequency Range428-442Mhz
ConditionOrange RX On, 5ft Away
RF Explorer Antenna

Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-38.60

Max Hold Level-37.60
Max Level Freq432.125Mhz
Image

LocationBay
Frequency Range428-442Mhz
ConditionOrange RX On, 5ft Away
RF Explorer Antenna

Not Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-24.10

Max Hold Level-23.60
Max Level Freq432.125 Mhz
Image

EzUHF Testing

Using Provided Antenna

LocationBay
Frequency Range426-442Mhz
ConditionEzUHF On, Low Power, 5ft Away
RF Explorer Antenna

Retracted

TX AntennaProvided Antenna (came with module)
Max Level

-34.4

Max Hold Level-30.9
Max Level Freq433.714Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionEzUHF On, Low Power, 5ft Away
RF Explorer Antenna

Not Retracted

TX AntennaProvided Antenna (came with module)
Max Level

-24.4

Max Hold Level-22.9
Max Level Freq433.143Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionEzUHF On, High Power, 5ft Away
RF Explorer Antenna

Not Retracted

TX AntennaProvided Antenna (came with module)
Max Level

-18.70

Max Hold Level-17.20
Max Level Freq432.125 Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionEzUHF On, High Power, 5ft Away
RF Explorer Antenna

Retracted

TX AntennaProvided Antenna (came with module)
Max Level

-28.9

Max Hold Level-28.9
Max Level Freq434.0Mhz
Image

Using Standard Testing Antenna

LocationBay
Frequency Range426-442Mhz
ConditionEzUHF On, Low Power, 5ft Away
RF Explorer Antenna

Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-36.20

Max Hold Level-36.20
Max Level Freq434.429Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionEzUHF On, Low Power, 5ft Away
RF Explorer Antenna

Not Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-25.4

Max Hold Level-25.4
Max Level Freq433.286
Image

LocationBay
Frequency Range426-442Mhz
ConditionEzUHF On, High Power, 5ft Away
RF Explorer Antenna

Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-31.70

Max Hold Level-31.70
Max Level Freq434.857
Image

LocationBay
Frequency Range426-442Mhz
ConditionEzUHF On, High Power, 5ft Away
RF Explorer Antenna

Not Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-21.90

Max Hold Level-21.90
Max Level Freq433.286Mhz
Image


900-960 Mhz Tests (in Bay)

Noise Floor

LocationBay
Frequency Range899-960Mhz
ConditionAll off, noise floor
RF Explorer Antenna

Retracted

Max Level

-97.05

Max Hold Level-96.05
Max Level Freq900.089
Image

Xbee Testing

LocationBay
Frequency Range899-960
ConditionXbee ON, 5ft Away
RF Explorer Antenna

Retracted

TX Antenna3dbi 868-928Mhz Antenna
Max Level

-70.01

Max Hold Level-70.01
Max Level Freq904.991
Image

LocationBay
Frequency Range899-960
ConditionXbee ON, 5ft Away
RF Explorer Antenna

Not Retracted

TX Antenna3dbi 868-928Mhz Antenna
Max Level

-64.49

Max Hold Level-64.49
Max Level Freq906.080Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionXbee ON, <1ft Away
NotesNot a significant noise level increase. Should avoid 435 band however
RF Explorer Antenna

Not Retracted

TX Antenna3dbi 868-928Mhz Antenna
Max Level

-94.00

Max Hold Level-91.00
Max Level Freq435.857Mhz
Image

LocationBay
Frequency Range426-442Mhz
ConditionXbee ON, Antennas next to each other
NotesBasically the worst case that can occur. Raises noise level to about 75dbm. Happened when antennas were perpendicular to one another. This is why we should keep the antennas away from each other
RF Explorer Antenna

Not Retracted

TX Antenna3dbi 868-928Mhz Antenna
Max Level

-76.50

Max Hold Level-76.50
Max Level Freq435.714Mhz
Image

Orange RX Interference Testing

LocationBay
Frequency Range899-960
ConditionOrange RX On, 5ft Away
RF Explorer Antenna

Not Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-85.42

Max Hold Level-85.42
Max Level Freq914.25, 930.025Mhz
Image

LocationBay
Frequency Range899-960
ConditionOrange RX On, 5ft Away
NotesNoise floor was about same level. So orangeRX had no effect
RF Explorer Antenna

Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-96.27

Max Hold Level-95.77
Max Level Freq900.89, 930.045Mhz
Image

DragonLink Interference Testing

LocationBay
Frequency Range899-960Mhz
ConditionDragon Link On, Lowest Power, 5ft away
NotesDragonLink TX is causing a bleed over to the 960Mhz band (since 430Mhz is a harmonic of 960)
RF Explorer Antenna

Retracted

TX AntennaProvided Nagoya
Max Level

-79.05

Max Hold Level-78.05
Max Level Freq954.009
Image

LocationBay
Frequency Range899-960Mhz
ConditionDragon Link On, Lowest Power, 5ft away
NotesDragonLink TX is causing a bleed over to the 960Mhz band (since 430Mhz is a harmonic of 960)
RF Explorer Antenna

Not Retracted

TX AntennaProvided Nagoya
Max Level

-74.55

Max Hold Level-73.05
Max Level Freq954.009
Image

EzUHF Interference Testing

LocationBay
Frequency Range899-960Mhz
ConditionEzUHF On, High Power, 5ft Away
RF Explorer Antenna

Not Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-86.89

Max Hold Level-86.89
Max Level Freq917.518
Image

LocationBay
Frequency Range899-960Mhz
ConditionEzUHF On, High Power, 5ft Away
NotesNo noticeble difference between noise floor. Has no effect
RF Explorer Antenna

Retracted

TX Antenna0.7dbi 398-428Mhz range
Max Level

-97.55

Max Hold Level-96.55
Max Level Freq900.089
Image

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