4m FM - John's Vademecum

Trace: • Measurements (2022)

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====== 4m FM ======

** Low Band PMR and 4m Ham band **

===== Background =====

The PMR radio system for the Shetland Islands Council (SIC) Roads dept. is being re-engineered (summer 2023) with new base station radios and a new IP based microwave link network.

I thought I would set myself up with the ability to monitor, and test coverage, both mobile and at home. I found my old [[public:musings:radio:radio_database:fm1100|FM1100]] and also was given a selection of other ones by SIC, as well as the PDP to program them. 

My plan is to configure the radios for //both// 4m ham band and SIC roads network.


===== Frequencies =====

=== SIC Roads PMR ===


^Site^Base TX ^Base RX^CTCSS^
|Bressay| 85.425 | 71.925 | 103.5 |
|Weisdale | 85.350 | 71.850 | 103.5 |
|Collafirth Hill | 85.225 | 71.725 | 103.5 |

=== 4m Amateur Band ===


  * 12.5kHz spacing
    * 70.3000
    * 70.3125
    * 70.3250
    * 70.3375
    * 70.3500
    * 70.3625
    * 70.3750
    * 70.3875
    * 70.4000
    * 70.4125
    * 70.4250
    * 70.4375
    * 70.4500 = FM Calling Channel
    * 70.4625
    * 70.4750
    * 70.4875


=== Business Radio Simple Light ===

  * 5 channels
    * 77.6875
    * 86.3375
    * 86.3500
    * 86.3625
    * 86.3750


--- //John Pumford-Green 20/05/23 12:25//


===== Further Information =====


{{tag>fm1100 4m radio}}

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