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Union Police Frequencies

We do not have frequencies listed specifically for Union in McCook County, South Dakota yet. Countywide channels for McCook County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Turkey Ridge (South Dakota State Radio System), about 20 miles away.

About Union Police Frequencies

  • 1 conventional channel is analog FM, so any scanner can receive it. Enter the frequency and set the tone shown in the table.
  • Trunked radio systems that carry law-enforcement traffic here: South Dakota State Radio System: 2 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 Union, start with the Turkey Ridge site of South Dakota State Radio System, about 20 miles away. Its control channels: 157.95, 159.375, 159.945 MHz.

McCook County channels that also cover Union

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
McCook County SheriffMcCook County Sheriff – Tactical Channel453.7500
In 458.7500
162.2 PLFMWNCF866

South Dakota State Radio System

AgencyDescriptionTalkgroupHexMode
McCook County SheriffMcCook County Sheriff – Dispatch10223feD
McCook County SheriffMcCook County Sheriff – Dispatch10233ffD

Nearest trunked radio sites

Distances are measured from the center of Union.

Turkey Ridge · South Dakota State Radio System
RFSS 1 · Site 15 (hex F) · NAC 47F · about 20 mi away
Control 157.95, 159.375, 159.945
Voice 157.83
Wall Lake · South Dakota State Radio System
RFSS 1 · Site 5 (hex 5) · about 21 mi away
Control 155.7, 157.4125, 157.7025
Voice 156.015, 159.615, 159.855, 160.155
Madison · South Dakota State Radio System
RFSS 1 · Site 28 (hex 1C) · NAC 47C · about 31 mi away
Control 159.78, 160.065
Voice 159.54, 159.915
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.