I am using a CDM-1250's in a system that uses a Kenwood repeater. I am getting a horrible squelch burst when the repeater dekeys roughly 1 second after the user dekeys. What are the settings that will eliminate this. I using TPL in and out as well as MDC. I stress that this is NOT the MDC burst, rather an annoyinging squelch tail.
Thanks.
CDM1250 Squelch tail
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HLA
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- What radios do you own?: HT1550's, X9000's, CDM1550's
you have to find out what the non standard reverse burst is going to have to be set to on your 1250 to match that kenwood. i think what you are hearing is the hang time on the repeater.
HLA
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I never check PM's so don't bother, just email me.
I won't reply to a hotmail, gmail, aol or any other generic free address, if you want me to reply use a real address.
STOP ASKING ME FOR SOFTWARE OR FIRMWARE, I JUST FORWARD ALL OF THE REQUESTS TO THE MODERATORS
Re: CDM1250 Squelch tail
Ett1033 wrote:(in part) CDM-1250's in a system that uses a Kenwood repeater. I am getting a horrible squelch burst when the repeater dekeys roughly 1 second after the user dekeys. Thanks.
The "squelch burst" is heard in the CDM 1250's.....
Set the Receiver MUTE rules to OR in the CPS for your CDM's.
The Kwood rptr just keeps the tone on the tail (dekey delay) without any attempt to drop the tone or send a "reverse burst" before dropping the TX to mute the CDM's receivers. The CDM, by design is still receiving in the PL tone ONLY mode. The CDM does not mute the receiver audio right away upon loss of TONE.
n5tbu,
The Kenwood repeaters do NOT send a reverse burst, only a simple phase reversal that the CDM radio receiver PL circuit willl NOT "see".
The CDM PL decoder does not "see" the Kwd phase reversal and the CDM therefor still has a vaild PL decode which holds/forces the receiver "open" causing the noise to be heard in the speaker.
The only setting in the CDM that may help is the OR mute condition setting. Then the CDM will "see" the loss of carrier and mute the receiver.
This "problem" has been with us eversince other radio manufacturs tried to implement PL..... like going on 30 odd years!!!
The Kenwood repeaters do NOT send a reverse burst, only a simple phase reversal that the CDM radio receiver PL circuit willl NOT "see".
The CDM PL decoder does not "see" the Kwd phase reversal and the CDM therefor still has a vaild PL decode which holds/forces the receiver "open" causing the noise to be heard in the speaker.
The only setting in the CDM that may help is the OR mute condition setting. Then the CDM will "see" the loss of carrier and mute the receiver.
This "problem" has been with us eversince other radio manufacturs tried to implement PL..... like going on 30 odd years!!!
Re: CDM1250 Squelch tail
I have a similar problem with HT1250 radios on a Kenwood repeater. They do not mute quietly, you can always hear a squelch tail. I tried using the "non standard reverse burst option" but it did not help. My Kenwood radio mutes quietly on the frequency. Any suggestions? Mute/Unmute rule?
Re: CDM1250 Squelch tail
Mr. Delta,delta3 wrote:I have a similar problem with HT1250 radios on a Kenwood repeater. They do not mute quietly, you can always hear a squelch tail. I tried using the "non standard reverse burst option" but it did not help. My Kenwood radio mutes quietly on the frequency. Any suggestions? Mute/Unmute rule?
Same holds true for the HT1250 radios, they need to have the receiver muting 'rule' set to OR. So the setting is And/OR. (see above post RE CDM radio)