Getting an extra smart key plus wheel key...

ChrisSlicks · 01-09-2011, 05:46 PM

Quote:

Originally Posted by Red__Zed

Yes it will. Places the fob in the dash reduces the required power transmission levels significantly.

The transmitter in the fob operates at a fixed power level, just because the signal has to travel a shorter distance won't help it in this case.

Red__Zed · 01-09-2011, 06:04 PM

Quote:

Originally Posted by ChrisSlicks

The transmitter in the fob operates at a fixed power level, just because the signal has to travel a shorter distance won't help it in this case.

It does not. The transmission is inversely proportional to received power level.

I've taken one of the fobs apart and actually played with the circuitry. Where do you gather that the transmission level is fixed?

sonic370 · 01-09-2011, 07:39 PM

i don't understand why you didn't get 2 sets of fobs........ your car is to new to get only one.. go back to the dealer and ask them where the second fob is at.

ChrisSlicks · 01-09-2011, 08:02 PM

Quote:

Originally Posted by Red__Zed

It does not. The transmission is inversely proportional to received power level.

I've taken one of the fobs apart and actually played with the circuitry. Where do you gather that the transmission level is fixed?

When I took mine apart I didn't identify anything that could control the transmitter power. Are you saying you actually measured the output? I didn't go as far as actually probing the circuit so if that's the case it is interesting. But I'll still keep the key in my pocket and replace the $1 battery when the time comes.

Red__Zed · 01-09-2011, 08:49 PM

Quote:

Originally Posted by ChrisSlicks

When I took mine apart I didn't identify anything that could control the transmitter power. Are you saying you actually measured the output? I didn't go as far as actually probing the circuit so if that's the case it is interesting. But I'll still keep the key in my pocket and replace the $1 battery when the time comes.

I keep mine in my pocket as well. I was just answering OP's question.

More accurately, TX power stays roughly the same, but the more power is received, the less that needs to be supplied by the battery. With a high enough RX power, the unit functions almost as a passive RFID.

c41006 · 01-09-2011, 08:52 PM

Please excuse me while my head explodes

LunaZ · 01-09-2011, 08:58 PM

Quote:

Originally Posted by Red__Zed

It does not. The transmission is inversely proportional to received power level.

I've taken one of the fobs apart and actually played with the circuitry. Where do you gather that the transmission level is fixed?

Quote:

Originally Posted by ChrisSlicks

When I took mine apart I didn't identify anything that could control the transmitter power. Are you saying you actually measured the output? I didn't go as far as actually probing the circuit so if that's the case it is interesting. But I'll still keep the key in my pocket and replace the $1 battery when the time comes.

What prompted you guys to dissect your fobs?

Lemers · 01-09-2011, 09:04 PM

Quote:

Originally Posted by LunaZ

What prompted you guys to dissect your fobs?

My FOB is bigger than your FOB

Red__Zed · 01-09-2011, 09:34 PM

Quote:

Originally Posted by LunaZ

What prompted you guys to dissect your fobs?

being an engineer

Doug&Michelle · 01-10-2011, 12:16 AM

Quote:

Originally Posted by sonic370

i don't understand why you didn't get 2 sets of fobs........ your car is to new to get only one.. go back to the dealer and ask them where the second fob is at.

I bought it used at a Chevy dealer (trade in). They only had the one key and no key for the wheels. They weren't even sure if there was an owner's manual but I did find that in the flip out behind the passenger seat.

ChrisSlicks · 01-10-2011, 08:17 AM

Quote:

Originally Posted by Red__Zed

I keep mine in my pocket as well. I was just answering OP's question.

More accurately, TX power stays roughly the same, but the more power is received, the less that needs to be supplied by the battery. With a high enough RX power, the unit functions almost as a passive RFID.

Ah, gotcha. And in the case of a dead battery it basically is a passive RFID. +rep for doing the extra digging.

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01-09-2011, 07:39 PM	#18 (permalink)
sonic370 A True Z Fanatic Join Date: May 2010 Location: Orange Texas Posts: 1,574 Drives: 09 370Z Sports PGK Rep Power: 18	i don't understand why you didn't get 2 sets of fobs........ your car is to new to get only one.. go back to the dealer and ask them where the second fob is at.

01-09-2011, 08:52 PM	#21 (permalink)
c41006 A True Z Fanatic Join Date: Oct 2010 Location: Atlanta Posts: 9,034 Drives: '10 G37 Coupe BO 7AT Rep Power: 114	Please excuse me while my head explodes