will mobile phone signal Interrupt with the radio?

[Shark]

as above.. anyone any encounter?

this afternoon while flying my new plane.. happliy .. suddenly my mobile rang and at this moment, my ehawk went into an upward motion and next drive straight into the ground

was it the mobile signal? or issit the glicthes?

confirm not pilot error..

[lu wei yao]

Yup! It has been proven that it actually does interfere with radio accersories. Especially with Synthesised modules
Do take note.

Thanx!

[AceViperX]

I do know it affects the Hitec Eclipse 7 even on PCM mode. Looked as if my heli suffered a hic up......

[csisfun]

I do know it affects the Hitec Eclipse 7 even on PCM mode. Looked as if my heli suffered a hic up......

Never happened to me on FM mode.

[Crabby]

Never happened to me on FM mode.

FM is also known as PPM(Pulse Position Modulation) whereas HP is using PCM(Pulse Coded Modulation). For a distance, the chances are lower. However, if your HP too near to any sources such as Tx. It will induce EMI(Electro-Magnetic Induction) on the Tx & hence induce noise via the antenna to the PCB/Component/Tx Crystal etc and has a negative effect on the Transmitting data(digital form). This will in turn, being receive by the Rx which causes the problem.

We always go for high Signal-to-Noise ratio to combat this problem.

U can also try doing that near to your Television & the same thing will happen. This time u can 'see & hear' the effect.

Interesting facts:
http://en.wikipedia.org/wiki/Pulse-position_modulation
http://en.wikipedia.org/wiki/Pulse_code_modulation

p/s: Been trying so hard to escape this topic when in STI/Poly days & now I am here talking about modulation

[$h@d0w]

Sorry Crabby, just a small correction. EMI is Electromagnetic Interference, not Electro-Magnetic Induction.

On a side note, I think Shark is on 35MHz, whereas our HP are either on 8-900MHz, 1.8GHz or 1.9GHz. Even if the 2nd spurious of the HP are way too far from the Tx frequency. If it's the 4th or 5th spurious that affected his Tx, I must say his HP power is strong.

[alamin2]

question

then may i ask why isit when i was hovering my old GWS dragonfly i had glitch which caused me to crash when someone calls me . im on 40mhz

[kenshinz]

You were distracted by the ring tone, then gabra

Morale of the story: Dun sign service-level agreement with ur gf to ans her calls within 3 rings

Ok sorry for the OT couldn't help it

[Crabby]

Sorry Crabby, just a small correction. EMI is Electromagnetic Interference, not Electro-Magnetic Induction.

On a side note, I think Shark is on 35MHz, whereas our HP are either on 8-900MHz, 1.8GHz or 1.9GHz. Even if the 2nd spurious of the HP are way too far from the Tx frequency. If it's the 4th or 5th spurious that affected his Tx, I must say his HP power is strong.

Thankz... was thinking of induction really hee hee anyway it is... the interference is caused by induction. The effect may also be caused by harmonics something like that even it is in different bandwidth. Haiz... was in radio communication in STI & always fallen asleep during classes. No wonder...

I muz agree with the 3 ring service agreement. Wat phone is Shark using BTW? Make sure that I won't be near when I see this phone.

[$h@d0w]

then may i ask why isit when i was hovering my old GWS dragonfly i had glitch which caused me to crash when someone calls me . im on 40mhz

Therotically, it shouldn't happen. However, in the real world, anything can happen.

[Warbird]

Hi,

interesting. I saw the same discussion before in some overseas forums.
My personal believe is that it is very unlikely that your radio will get affected by a mobile phone.

Just consider:
- Your mobile phone as has a max peak output power of 2 Watt if you are on 900MHz or 1 Watt if you are on 1800MHz.

- A mobile base station has an output power of around 100 Watt or more (for lager macro cellular base stations covering a bigger space)

As the base stations power is much higher wouldn't this mean that if you fly close to a base station the likelihood of interference would be very high?

Now if you look at a some of the flying sites in Singapore you will see base station antennas extremely close to the flying field (example RMS in Tuas)........................