About Harrison Police Frequencies
- 3 conventional channels use a digital mode (DMR), which needs a scanner that decodes that mode.
- Trunked radio systems that carry law-enforcement traffic here: Tennessee Valley Authority - Security and Emergency Management: 1 talkgroup. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Harrison, start with the Sequoyah Nuclear Power Plant site of Tennessee Valley Authority - Security and Emergency Management, about 8 miles away. Its control channels: 169.775 MHz.
Hamilton County channels that also cover Harrison
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Hamilton County Jail and Detention Center | Operations A . | 453.1625 In 458.1625 | DMR | WRMM385 | |
| Hamilton County Jail and Detention Center | Operations B | 453.3375 In 458.3375 | DMR | WRMM385 | |
| Hamilton County Jail and Detention Center | Operations C | 453.6625 In 458.6625 | DMR | WRMM385 |
Tennessee Valley Authority - Security and Emergency Management
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Systemwide | Law Main Dispatch | 5001 | 1389 | T |
Nearest trunked radio sites
Distances are measured from the center of Harrison.
Sequoyah Nuclear Power Plant · Tennessee Valley Authority - Security and Emergency Management
RFSS 1 · Site 4 (hex 4) · NAC BC4 · about 8 mi away
Control 169.775
Soddy-Daisy · Tennessee Advanced Communications Network (TACN)
RFSS 2 · Site 76 (hex 4C) · NAC 2A6 · about 8 mi away
Control 770.80625
Voice 771.93125
East Ridge · Tennessee Valley Authority - Security and Emergency Management
RFSS 1 · Site 7 (hex 7) · NAC BC7 · about 10 mi away
Control 172.4375
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.