VCO Modulator Function?

The General forum is where users can discuss any topic regarding Motorola communications equipment - hardware, software, etc. There are also several focused forums on this board, so please take the time to ensure that your questions doesn't fall into one of those categories before posting here!

Moderator: Queue Moderator

Post Reply
User avatar
N6LAU
Posts: 382
Joined: Mon Apr 14, 2008 12:42 am
What radios do you own?: Talkabout-250 w/ P25 Phase 2

VCO Modulator Function?

Post by N6LAU »

Can anyone tell me what the function of the VCO modulator is on a UHF Saber 2. I was having some problems with low transmit audio with my Saber 2 and adjusting the VCO modulator deviation brought the audio up considerably. I just want to know if doing this might cause my radio to transmit off-frequency or have any adverse affects.
Joe - N6LAU
Top
User avatar
jackhackett
Posts: 1518
Joined: Tue Jun 10, 2003 8:52 am

Re: VCO Modulator Function?

Post by jackhackett »

I'll give a simplified explaination.. they generally use two types of modulation, VCO and Reference. The voice signal modulates the VCO. The Reference modulation is used for low frequency signals, such as PL and data, they do this because the VCO loop filter won't allow the low frequencies to modulate the VCO very well. So it looks like you adjusted the correct thing.
Top
Post Reply

Return to “General Motorola Solutions & Legacy Radio Discussion”