Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

change the frequency of the transmiter

Status
Not open for further replies.

jasonomb

Newbie level 6
Newbie level 6
Joined
Sep 19, 2009
Messages
13
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,347
how can I change the frequency from the external tuning port on this chip???use pin12??or waht??
 

Put on the oscillator pin ( say pin 11 ) a varicap and drive it witha DC voltage.

Mandi
 

FANT said:
Put on the oscillator pin ( say pin 11 ) a varicap and drive it witha DC voltage.

Mandi

Wrong information...

Pin11 serves as resonator input of Main Oscillator but synthesizer output is corralated by divider ratio and the reference oscillator frequency. Synthesizer frequency 32 or 64 times of the reference oscillator frequency so it's fixed by divison ratio and reference frequency.
To change the output frequency, the reference frequency that consists of a crystal oscillator ( or maybe similar external source ) should be changed and output frequency will be changed 32 times or 64 times of the reference depending on divison ratio..
 

BigBoss ( As name says ) is right. Just change the pin from 11 to 15 or 16 to change the frequency of the reference oscillator.
Just a Type mistake.

Mandi
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top