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Re: [Discuss-gnuradio] Divide frequency by a constant
From: |
Barry Duggan |
Subject: |
Re: [Discuss-gnuradio] Divide frequency by a constant |
Date: |
Wed, 19 Jun 2019 12:55:25 -0400 |
User-agent: |
Roundcube Webmail/1.3.8 |
Marcus, Chris, and others:
What I am really trying to do is replicate a time-domain FSK modem I
designed in 1972 (using discrete components of course). It used a
crystal oscillator at 12,770 hz (square wave) and divided that by 5 and
then ANDed with the input signal. The other path divided by 6 and ANDed
with the inverted input signal. The two paths were ORed together and
divided by 2, giving a fairly good phase-coherent FSK with 1277 / 1064
frequencies. Low pass filtering followed.
Why don't I just switch between 1277 and 1064 signal sources? Because
the result is not phase-coherent.
My other objective is just to learn what I can do with Gnu radio :)
Cheers!
---
Barry Duggan
- [Discuss-gnuradio] Divide frequency by a constant, Barry Duggan, 2019/06/18
- Re: [Discuss-gnuradio] Divide frequency by a constant, Jonas Manthey, 2019/06/18
- Re: [Discuss-gnuradio] Divide frequency by a constant,
Barry Duggan <=
- Re: [Discuss-gnuradio] Divide frequency by a constant, Kyeong Su Shin, 2019/06/20
- Re: [Discuss-gnuradio] Divide frequency by a constant, CEL, 2019/06/20
- Re: [Discuss-gnuradio] Divide frequency by a constant, Barry Duggan, 2019/06/20
- Re: [Discuss-gnuradio] Divide frequency by a constant, CEL, 2019/06/20
- Re: [Discuss-gnuradio] Divide frequency by a constant, Barry Duggan, 2019/06/20
- Re: [Discuss-gnuradio] Divide frequency by a constant, CEL, 2019/06/20
- Re: [Discuss-gnuradio] Divide frequency by a constant, Barry Duggan, 2019/06/20
- Re: [Discuss-gnuradio] Divide frequency by a constant, CEL, 2019/06/20
Re: [Discuss-gnuradio] Divide frequency by a constant, CEL, 2019/06/19