Either way you are going to hear a squelch crash. If you turn reverse burst on, your transmitter will stay keyed slightly longer while it is transmitting the out of phase pl signal that makes a compatible receiver instantly mute. The Kenwood repeater receiver is not compatible (so it seems).
There is about three possibilities I can think of to rid your system of squelch crash. None of witch are real easy to accomplish. Easiest of all would be to make the users pl pass through the repeater. Would still hear squelch crashes if your mobile radios mic was off hook or your portables were not set to decode pl. 1) install an audio delay board between the controller and receiver audio input. But that would only eliminate the squelch tail while users were talking (as long as the repeater transmitter remains keyed) You are always going to hear a squelch crash when the repeater transmitter unkeys unless you can figure a way to transmit pl tone only when there is cos and make the hang time slightly longer than the time it takes your Motorola receivers to mute. 2) Install a community repeater tone panel (repeater controller) capable compatible with Motorola reverse burst on both transmit and receive. Would require disabling the repeaters internal controller. Probably the best way. 3) install a pl decoder (like a TS-64 from Comm Spec) on the repeater receiver and transmitter each compatible with Motorola reverse burst. I do not know for sure if the TS-64 is motorola compatible. Would require bypass of the repeaters internal decoder and interfacing the encoder and decoder to the proper place in the transmitter and controller. There may be other ways that I have not thought of, anyone else? tom Peter Dakota Summerhawk wrote: > > > Eric, > > So what settings should you have for the Motorola radios to avoid the > squelch tail in the system? Reverse burst turned on or off? > > Thanks > > > > Peter Summerhawk > > > > *From:* [email protected] > [mailto:[email protected]] *On Behalf Of *Eric Lemmon > *Sent:* Friday, December 11, 2009 10:22 PM > *To:* [email protected] > *Subject:* RE: [Repeater-Builder] RE: 50 Watt Repeater > > > > > > Paul, > > You have put your finger on the major difference between modern > Motorola and > Kenwood radios. Kenwood chose to equip their products to process only the > 180-degree phase shift reverse-burst squelch tail elimination scheme, > while > Motorola Professional Series radios can be programmed for either > 180-degree > or 120-degree phase shift. TIA-603-C, the international standard for > land-mobile radio performance, recognizes both reverse schemes as equally > viable. Kenwood may recapture some market share, once their radios are > equipped to encode and decode reverse burst in either scheme. > > 73, Eric Lemmon WB6FLY > > > -----Original Message----- > From: [email protected] > <mailto:Repeater-Builder%40yahoogroups.com> > [mailto:[email protected] > <mailto:Repeater-Builder%40yahoogroups.com>] On Behalf Of Paul Dumdie > Sent: Friday, December 11, 2009 8:12 PM > To: [email protected] > <mailto:Repeater-Builder%40yahoogroups.com> > Subject: [Repeater-Builder] RE: 50 Watt Repeater > > I have a TKR-750 repeater and like it. My only issue is that I use > Motorola > Portables and keep getting a squelch crash. What have you guys setting the > setting for the reverse burst at to get rid of the squelch crash? > > Thanks! > > Paul R. Dumdie Jr. "73" > W9DWP/R IRLP-NODE-4455 > 443.025/2A 145.270/1B/1Z/NAC-293 > ARC-Radio-8 KCARES KCAPS > HERD546 EX WB9QWZ > WQGG738-462.725 AAR5CU/T > www.riflesandradios.com > www.theherd.com > > > >
