baybum
Member
Hello all...What is heard on the Mt. Airy and Howard Waste Treatment ASR's? Anything? What is an ASR and why does it need to be a separate system from the Howard Simulcast system?
Thanks
Thanks
Howard ASR's
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The Mt. Airy ASR carries normal system traffic into Frederick County, north into Carroll County (both Frederick and Carroll counties do not have simulcast sites due to terrain and frequency reuse issues,) western Howard County and northern Montgomery County, so it's an important site. The Water Treatment ASR extends coverage into northern PG, eastern Montgomery and western Anne Arundel counties. Not sure why they decided on an ASR, but probably frequency reuse protection.
From my travels westerly, I have noticed the Mt. Airy ASR to be a pretty active site. It has a pretty wide coverage when traveling on I-70.
baybum
Member
Would it be accurate to say that an ASR is used as an "extender", and carries all the same talk groups?
As a general rule yes if I understand what you are asking. It is just another site that the subscriber radio can affiliate to. It acts the same as the Howard or Anne Arundel simulcast sites... just not simulcast. Just the one tower.
It would only carry a TG if at least 1 radio is affiliated to the site while there is traffic on the TG, Generally Speaking.. So you may not hear the exact same traffic as a larger covering area simulcast neighbor site.
baybum
Member
Got it...Thanks you all for clearing that up...be safe.
No, not an "extender" in that ASRs in the FIRST system are mostly independent sites. They *might* carry a set of slightly different traffic depending on how the site is set up, what traffic a neighbor site is carrying, what radios are currently affiliated, and what TGs are in use. Remember that in Frederick and Carroll counties, they only have ASR sites, but typically neighboring ASR sites in that area carry the mostly the same traffic. The Mt. Airy site has 7 neighbors, and it carries a *lot* of traffic, whereas Greenbury Point only has one neighbor site (even though it 'borders" several sites,) and is configured to carry a subset of traffic that you see on the AACo site, mostly related to Annapolis (state police and Captial Police.)
ASR = ASTRO 25 Stand-alone Repeater site
Motorola's terminology for any trunked site that is not part of a simulcast cell. ASR's can range from very small fill-in sites that only have 2 repeaters (control + traffic (voice/data)), up to a full capacity site comprised of up to 28 repeaters.
ASR's can be found alongside simulcast cells where coverage is needed in an area where it would be impractical or impossible to extend the simulcast cell, due to licensing issues, geography, or other concerns. They can also provide additional channel capacity in busier areas to lessen the load on a simulcast cell, such as having a "metro/downtown" ASR complimenting the larger "countywide" simulcast cell.
Motorola's terminology for any trunked site that is not part of a simulcast cell. ASR's can range from very small fill-in sites that only have 2 repeaters (control + traffic (voice/data)), up to a full capacity site comprised of up to 28 repeaters.
ASR's can be found alongside simulcast cells where coverage is needed in an area where it would be impractical or impossible to extend the simulcast cell, due to licensing issues, geography, or other concerns. They can also provide additional channel capacity in busier areas to lessen the load on a simulcast cell, such as having a "metro/downtown" ASR complimenting the larger "countywide" simulcast cell.
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