Re: [Repeater-Builder] tone trivia..?

[Gregg R. Lengling]

Using tones below 60 Hz usually doesn't work for 2 reasons.  #1 reason is that the transmitter will not reproduce that low of a tone without distortion and overdriving....and the receiver audio won't recover it.  #2 the lower the frequency the longer it takes to decode.....I realize it's not a great amount of time difference with todays uP decoders but it is still slower.  To operate tones at very low frequencies you would need a NRZ modulator to get decent response.   Gregg R. Lengling, W9DHI, Un-Retired K2/100 SN 3075 http://www.milwaukeehdtv.org ----- Original Message ----- From: James To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 04, 2004 7:54 PM Subject: Re: [Repeater-Builder] tone trivia..? Many of the tones that tha Com-Spec TS64 series borads will do are non-standard tones (per EIA).  Has anyone used any of these?? especially the low ones like 33 Hz?? James kc0rtx wrote: 254.1 - 0Z - NON EIA STANDARD TONES   Randy KC0RTX ----- Original Message ----- From: James To: Repeater-Builder@yahoogroups.com Sent: Friday, December 03, 2004 9:35 PM Subject: Re: [Repeater-Builder] tone trivia..? Kevin, you're just a show off (putting the com-spec code in there) James 0Z  - Find that one if ya dare :) Kevin Custer wrote: James wrote: ok guys.   4Z Motorola 4Z CTCSS 136.5 Hz. Com-Spec # 21 Kevin Custer Yahoo! Groups Links To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/   To unsubscribe from this group, send an email to: [EMAIL PROTECTED]   Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.