About Preemption Police Frequencies
- 9 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
Mercer County channels that also cover Preemption
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| 911 / ETSB | 911/Sheriff – Local Police – Aledo | 154.3850 In 150.7900 | FMN | WPEH963 | |
| Mercer County Sheriff | Mercer County Sheriff – Dispatch – New (Aledo) | 151.2275 In 156.1875 | 162.2 PL | FMN | WNHJ643 |
| Mercer County Sheriff | Mercer County Sheriff – Dispatch | 154.1000 In 159.0525 | 71.9 PL | FMN | WNHJ648 |
| Mercer County Sheriff | Mercer County Sheriff – Dispatch (at ??) | 155.6250 In 156.0300 | 192.8 PL | FMN | WNHJ643 |
| Mercer County Sheriff | Mercer County Sheriff – Dispatch (at ??) | 155.6250 In 156.0300 | 179.9 PL | FMN | WNHJ643 |
| Mercer County Sheriff | Mercer County Sheriff – Dispatch (at ??) | 155.6250 In 156.0300 | 186.2 PL | FMN | WNHJ643 |
| Mercer County Sheriff | Mercer County Sheriff – Dispatch (Extender/RF Link-Aledo) | 469.5500 | 123.0 PL | FMN | — |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Mercer County Sheriff | Car-to-Car | 151.6250 | 186.2 PL | FMN | WNHJ643 |
| Mercer County Sheriff | Mobile Extenders | 465.4750 | FMN | WNHJ643 |
Nearest trunked radio sites
Distances are measured from the center of Preemption.
Rock Island · STARCOM21 Statewide Illinois
RFSS 2 · Site 43 (hex 2B) · NAC 146 · about 10 mi away
Control 852.325
Voice 851.4875, 852.85, 853.375, 853.95
Moline 700 · STARCOM21 Statewide Illinois
RFSS 2 · Site 46 (hex 2E) · NAC 142 · about 11 mi away
Control 770.71875
Voice 770.21875, 773.79375
Moline 800 · STARCOM21 Statewide Illinois
RFSS 2 · Site 47 (hex 2F) · NAC 143 · about 14 mi away
Control 851.8875
Voice 851.3625, 852.4125, 852.9375, 853.4625
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.
Common questions
What frequency do the police use in Preemption?
We do not have a dispatch channel listed specifically for Preemption. County-level dispatch channels in the same county: Mercer County Sheriff 151.2275 MHz (162.2 PL); Mercer County Sheriff 154.1000 MHz (71.9 PL); Mercer County Sheriff 155.6250 MHz (192.8 PL); Mercer County Sheriff 155.6250 MHz (179.9 PL).