Great video - just to make a correction on the video ,The RAS alias and Privacy alias has no bearing on the function , only for human reference .The Key value and ID for Privacy has to be correct .Thanks Brad
Silly question, when simplex and dual capacity direct mode, only 12.5 khz is needed? On the other hand, when using a single repeater, total of 25khz (2x12.5 khz) is used (when not using single freq. repeater mode)? Basically, 2 time slots in, 2 time slots out? For DMR, is it ok to use 2 adjacent 12.5khz channels, or should there be "guard" frequency in between? Let's say an organization goes to the regulator, is it better to request a licence for 2 disjointed 12.5khz channels than 1x 25khz?
All DMR channels are 12.5Khz channels. There are 2 time slots in the 12.5Khz channel. They are TDMA, so not like in FDMA 6.25Khz apart. 2 x DMR timeslots in a 12.5Khz channel. TETRA frequencies are issued as 25KHz channels as they utilise 4 time slots on a frequency. Dual Capacity Direct Mode is utilising 2 time slots in Simplex Mode. If you need more clarification please contact Grant Sleep on 1300 121 155. Thanks for your question.
@@AceCommunicationDistributors The question was what spacing is used if for example you have 2 or more DMR repeaters. Each repeater has an RX and a TX frequency, so 12.5Khz each, 25Khz in total per repeater? And then another repeater that adds 2 additional channels, is it acceptable to just put the frequencies next to each other?
@@vzivadinovic We would normally run a minimum of 300Khz between repeaters on a site if Multi-coupling was being utilised. You can run them right next to each other at 12.5Khz each, but you may get de-sensing on the system
Great video - just to make a correction on the video ,The RAS alias and Privacy alias has no bearing on the function , only for human reference .The Key value and ID for Privacy has to be correct .Thanks Brad
Silly question, when simplex and dual capacity direct mode, only 12.5 khz is needed? On the other hand, when using a single repeater, total of 25khz (2x12.5 khz) is used (when not using single freq. repeater mode)? Basically, 2 time slots in, 2 time slots out? For DMR, is it ok to use 2 adjacent 12.5khz channels, or should there be "guard" frequency in between? Let's say an organization goes to the regulator, is it better to request a licence for 2 disjointed 12.5khz channels than 1x 25khz?
All DMR channels are 12.5Khz channels. There are 2 time slots in the 12.5Khz channel. They are TDMA, so not like in FDMA 6.25Khz apart. 2 x DMR timeslots in a 12.5Khz channel. TETRA frequencies are issued as 25KHz channels as they utilise 4 time slots on a frequency. Dual Capacity Direct Mode is utilising 2 time slots in Simplex Mode. If you need more clarification please contact Grant Sleep on 1300 121 155. Thanks for your question.
@@AceCommunicationDistributors The question was what spacing is used if for example you have 2 or more DMR repeaters. Each repeater has an RX and a TX frequency, so 12.5Khz each, 25Khz in total per repeater? And then another repeater that adds 2 additional channels, is it acceptable to just put the frequencies next to each other?
@@vzivadinovic We would normally run a minimum of 300Khz between repeaters on a site if Multi-coupling was being utilised. You can run them right next to each other at 12.5Khz each, but you may get de-sensing on the system
@@AceCommunicationDistributors Thank you! Very informative!
hello, very interesting webinar, can you share the developed tables?
Very interesting your presentation. if you can share that fleet-map i am appreciate.
In case one repeater and designed to 5 talk groups. How to setup terminal automatic select to free time slot into repeater?