Nice hack to increase signal strength

[xconwayx]

Originally Posted by krohnjw

http://www.acbpocketsoft.com/Product...verview-2.html

Thanks!

[91ludesit]

Is there a way to do this from Macintosh?

[krohnjw]

Originally Posted by junior1234

If this is what I think it is ,then actually the change from -81dbm to -84 dbm is actually representing that you just made your receiver twice as sensitive as before so a signal only half as large as what used to be the minimum threshold to make your receiver work is needed

I think the confusion here is what does Rx Power represent. Does it represent signal strength or sensitivity? By upping the gain we should by definition increase the power of the signal and, if Rx Power represents signal strength, see a stronger RX power in the debug interface. In this case what is being seen is actually a weaker signal (-84dBm).

However, if Rx Power is actually representing Rx sensitivity then I agree that a lower number will pick up a weaker signal (3dB weaker by definition). In this case we have increased "radio sensitivity" by boosting the power of the signal and will pick up weaker signals as indicated by the drop in Rx Power by 3dBm. I wouldn't call that twice as sensitive, but clearly more sensitive.

Originally Posted by junior1234

its not a matter of enabling it you are changing the level at which it operates, and yes battery life would be affected think car amplifier turn up the gain to hear that really poor dubbing in your cd player and yes it will play louder at a lower volume setting on your deck but the reason is because youre overworking the amplifier...theres no such thing as free energy....energy cannot be created nor destroyed only change forms ...so if your phone is using more power its taking it from somewhere...the battery, in order to give you better reception.

If the NV_FM_AGC setting is not a 0/1 toggle then I am curious what valid values exist and what they correlate to. Clearly the implication was not that battery life would not be impacted if gain is boosted - rather it was an exploration of why a provider would possibly not enable it by default (as allowing gain to be dynamically adjusted would allow for the best battery by scaling down in areas of strong signal and quality of signal by boosting the signal in areas of low signal - seemingly #1 in both regards for providers).


For what it's worth this was apparently an issue for the Sprint Treo Pro dropping/missing calls (not the GSM version) and was resolved by *upping* the GAIN_OFFSET values all above 3000 from around the values that are being discussed lowering the settings to here. http://treo.discussion.treocentral.c...d.php?t=180933

[junior1234]

Fact not fiction -3 dbm difference is DOUBLE, TWICE AS MUCH since we are dealing with values that are affecting the sensitivity and Q (selectivity) of the radio receiver. and yes it Will affect drainage to your battery nothing gained for free and all modern transceiver equipment has some type of gain control ,whether or not its adjustable by the end user or is solid state locked in by manufacturer and controls itself based on the need and parameters of its operational design. Sorry if I didnt make it clear enough the first time .trying to keep as pedestrian as possible , but trust that your AGC is not turned off and that adjusting these values merely allows that Weak signal to be used and in doing so it takes more amplification to make it useable ...have you ever seen an amplifier that required no current or that gave higher output results as the power supplied to it was decreased , excluding "clipping " situations no because its not a fantasy device.Oh , and the post referenced supports what I already said...

[91ludesit]

Thanked OP, my original values were:
NV_C0 = 2283
NV_C1 = 3000

Changed to the values the OP used. Went from no signal in my apartment to the same signal level my girlfriend gets! 2 BARS!!!!! I could actually make calls!

One question, how permanent is this? If I flash my rom or radio do I have to redo this hack?

[odomocos]

Originally Posted by kaoss_11

never mind once I ##3424 / ##3424# = DIAG (DMR - for QPST editing) it automatically recognizes the phone

how did you connect the phone? I tried it dose not work.

[cchris81]

anyone having a problem with rf nv manager?? When I try to read from phone i get an error "exception thrown"... Gonna try it on XP using Win 7 now


Edit, doesn't work on XP either...

Edit Edit: I'm a dumdum, have to select the com port in RF NV Manager as well

[Count_Chockula]

So barring battery usage (good or bad) is this hack worth the time and effort of setting up QPST? What I mean is... with the weaker signal being amped up can you still make intelligible sounding calls out?

[JuMpMaN6235]

I am using windows 7 and i still cannot get QPST to detect the phone. I installed the drivers that are in this thread and my phone does show up in device managaer (as COM4) but when i open QPST it does not list it.. i did try the ##DIAG# ..
EDIT: nevermind lol.. i thought it would automatically show up in QPST, but you need to manually add it..

[fenixjn]

Originally Posted by xconwayx

Wow... just wow....

I chose the Comport Configure and chose my port. Then clicked the READ FROM PHONE button and guess what worked!

You sir are made of win! Thanks!