Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old March 3rd 09, 11:19 PM posted to rec.radio.amateur.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Mar 2009
Posts: 8
Default Peak-to-peak voltage for mic input?

I've made a digital modem and am trying to figure out how much I need
to reduce the modem's audio output before piping the signal into an IC-
V8. I want to make sure the voltage is high enough to RX well, but
not so high that the signal is clipped of the IC-V8 is damaged.
Anyone know what the typical peak-to-peak voltage is for a standard
mic input?

Thanks in advance for any advice!
Dave

  #2   Report Post  
Old March 3rd 09, 11:54 PM posted to rec.radio.amateur.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Sep 2008
Posts: 21
Default Peak-to-peak voltage for mic input?

dave.harper wrote:
I've made a digital modem and am trying to figure out how much I need
to reduce the modem's audio output before piping the signal into an IC-
V8. I want to make sure the voltage is high enough to RX well, but
not so high that the signal is clipped of the IC-V8 is damaged.
Anyone know what the typical peak-to-peak voltage is for a standard
mic input?

Thanks in advance for any advice!

========================
Assuming that the modem has an adjustable output , I would suggest you
hook it up to the radio and ,starting at zero input ,see at what mike
input level you get an output by listening to a receiver.
If the radio has its own mike being an electret type (possibly with an
additional built-in pre-amplifier) the mike input signal will highly
likely be in the 50 - 300 mV range .


Frank GM0CSZ / KN6WH


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Peak Oil and Amateur Radio Frank Dresser Shortwave 3 July 5th 08 05:19 AM
Kahn Symmetra-Peak mcp6453 Broadcasting 0 February 19th 06 02:56 AM
FA: Peak Reaking SWR and Power meter N2TU Swap 0 November 24th 04 07:16 PM
FA: 5KW peak Low Pass Filter Radiodan-W7RF Swap 0 April 14th 04 05:22 AM
FA: Bird 15 KW Peak Reading Wattmeter nanu Swap 0 November 14th 03 08:19 PM


All times are GMT +1. The time now is 06:10 PM.

Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017