About Rocksbury Police Frequencies
- Trunked radio systems that carry law-enforcement traffic here: Allied Radio Matrix for Emergency Response (ARMER): 9 talkgroups. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Rocksbury, start with the Thief River Falls site of Allied Radio Matrix for Emergency Response (ARMER), about 4 miles away. Its control channels: 851.3125, 852.9 MHz.
- 2 listed entries are marked encrypted. No scanner can decode encrypted audio.
Pennington County channels that also cover Rocksbury
Allied Radio Matrix for Emergency Response (ARMER)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Pennington County Sheriff | Pennington Law | 50500 | c544 | D |
| Pennington County Sheriff | Pennington Law | 50501 | c545 | D |
| Pennington County Sheriff | Pennington County Law Tactical | 50503 | c547 | D |
| Pennington County Sheriff | Pennington County Law Tactical | 50504 | c548 | D |
| Pennington County Sheriff | Pennington County Probation | 50506 | c54a | D |
| Pennington County Sheriff | Pennington County Law Administration | 50507 | c54b | D |
| Pennington County Sheriff | Pennington County Sheriff Administration | 50508 | c54c | D |
2 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Pennington County Sheriff | Pennington County Law | 50502 | c546 | D Encrypted |
| Pennington County Sheriff | Pennington County Sheriff – Tactical Channel | 50541 | c56d | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Rocksbury.
Thief River Falls · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 6 · Site 90 (hex 5A) · about 4 mi away
Control 851.3125, 852.9
Voice 852.0625, 852.2, 853.625
Red Lake Falls · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 6 · Site 91 (hex 5B) · about 11 mi away
Control 851.2125, 855.2125, 857.2125
Voice 855.7125, 856.7125, 859.7625
Plummer · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 6 · Site 92 (hex 5C) · about 12 mi away
Control 853.475, 855.4625
Voice 851.9, 857.9375, 858.9625
What do these numbers mean?
- Control channel
- The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
- Voice
- The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
- Site
- One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
- RFSS (Radio Frequency Sub-System)
- A group of sites run by the same controller. Large Project 25 systems can have several.
- NAC (Network Access Code)
- A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
- Talkgroup
- A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.