About Schroeder Police Frequencies
- Trunked radio systems that carry law-enforcement traffic here: Allied Radio Matrix for Emergency Response (ARMER): 7 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 Schroeder, start with the Lake Co. Simulcast site of Allied Radio Matrix for Emergency Response (ARMER), about 22 miles away. Its control channels: 851.1625, 854.0875 MHz.
- 1 listed entry is marked encrypted. No scanner can decode encrypted audio.
Cook County channels that also cover Schroeder
Allied Radio Matrix for Emergency Response (ARMER)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Cook County Sheriff | County Law Main | 38200 | 9538 | D |
| Cook County Sheriff | Law Dispatch | 38205 | 953d | D |
| Cook County Sheriff | Law Dispatch | 38206 | 953e | D |
| Cook County Sheriff | Law Dispatch | 38207 | 953f | D |
| Cook County Sheriff | Law Dispatch | 38208 | 9540 | D |
| Cook County Sheriff | Law Dispatch | 38209 | 9541 | D |
1 encrypted talkgroup (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Cook County Sheriff | Cook County Law Tactical 1E | 38210 | 9542 | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Schroeder.
Lake Co. Simulcast · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 5 · Site 46 (hex 2E) · about 22 mi away
Control 851.1625, 854.0875
Voice 852.1625, 852.3875, 852.675, 852.925, 853.4
Cook Co. Simulcast · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 5 · Site 40 (hex 28) · about 32 mi away
Control 853.075, 854.1625
Voice 851.2125, 851.4375, 851.7875, 852.0875, 852.4375, 852.7375
Ely · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 5 · Site 78 (hex 4E) · about 42 mi away
Control 851.375, 852.4875
Voice 852.25, 853.4875, 853.9, 854.2625
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.