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Rockville Police Frequencies

We do not have frequencies listed specifically for Rockville in Sherman County, Nebraska yet. Countywide channels for Sherman County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Ravenna (Nebraska State Radio System), about 7 miles away.

About Rockville Police Frequencies

  • 2 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
  • Trunked radio systems that carry law-enforcement traffic here: Nebraska 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 Rockville, start with the Ravenna site of Nebraska State Radio System, about 7 miles away. Its control channels: 854.9875, 855.2375, 855.4875 MHz.
  • 1 listed entry is marked encrypted. No scanner can decode encrypted audio.

Sherman County channels that also cover Rockville

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Sherman, County ofSheriff / Fire155.8950
In 153.7850
123.0 PLFMNWNXL707

Talk-around & Car-to-Car

AgencyDescriptionFrequency (MHz)ToneModeFCC
Sherman, County ofSherman, County of – Alternate155.4150
In 158.9700
123.0 PLFMNWNYP979

Nebraska State Radio System

AgencyDescriptionTalkgroupHexMode
Sherman County SheriffSherman County Sheriff – Dispatch55601d931D
1 encrypted talkgroup (cannot be monitored)
AgencyDescriptionTalkgroupHexMode
Sherman County SheriffSheriff Secure55062d716D

Nearest trunked radio sites

Distances are measured from the center of Rockville.

Ravenna · Nebraska State Radio System
RFSS 1 · Site 28 (hex 1C) · NAC B88 · about 7 mi away
Control 854.9875, 855.2375, 855.4875
Voice 854.6875
Pleasanton · Nebraska State Radio System
RFSS 1 · Site 56 (hex 38) · NAC B8E · about 17 mi away
Control 154.965, 155.4375
Voice 154.175, 154.37
Pleasanton 800 · Nebraska State Radio System
RFSS 1 · Site 27 (hex 1B) · NAC B87 · about 22 mi away
Control 856.0125, 856.2625, 856.4875
Voice 855.7375
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.