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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
  • 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

900-960 Mhz Tests (in Bay)

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
ConditionAll off, noise floor
RF Explorer Antenna

Retracted

Max Level

-97.05

Max Hold Level-96.05
Max Level Freq900.089
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

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

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