Family GMRS Voice Procedure

1. Listen first. If someone is talking, wait.
2. Call who you want. “Base, this is Sarah.” (Pause.)
3. Send the message. One topic at a time.
4. Require a read-back for critical info. Locations, times, directions, injuries.
5. End clearly. “Copy.” / “Standing by.” / “Out.”
6. Use your channel plan. If it’s busy, go to your backup channel.

Privacy Codes (CTCSS/DCS) — When to Turn Off

Privacy codes do not make you private. They filter what you hear. If you suspect someone is transmitting and you can’t hear them, turn privacy codes off to test.

Radio Check

SCRIPT “Base, this is Sarah. Radio check.”

REPLY “Sarah, this is Base. I read you loud and clear. Radio check.”

CONFIRM “Base, copy loud and clear. Standing by.”

Location Update (With Read-Back)

SCRIPT “Base, this is Mike. I am at the north parking lot entrance by the tall sign. Need pickup in 5 minutes. Please read back.”

REPLY “Mike, this is Base. Copy: north parking lot entrance by the tall sign. Pickup in 5 minutes.”

Medical / Injury

SCRIPT “Base, this is Sarah. Injury. One person has a deep cut on the left hand. Bleeding controlled. We are at the trailhead gate. Need transport. Read back location.”

Channel Change

SCRIPT “Channel is busy. Switch to backup channel now. Confirm when set.”

REPLY “Copy. Switching now. I am on backup channel.”

Lost / Separated

SCRIPT “Base, this is Mike. I am separated. Last known: near the red bridge. I will stay put for 10 minutes. Ping me every 2 minutes.”

1. Talking too long. Send one point at a time.
2. No read-back. If it matters, confirm it.
3. Privacy code confusion. It filters what you hear; it’s not encryption.
4. No channel plan. Primary + backup prevents losing people.
5. Low volume / dead battery. Most “radio failures” are power or volume.
6. Keypad unlocked. Accidental channel changes happen constantly.
7. No pause before speaking. Press-to-talk, pause, then speak.
8. Assuming silence means nobody is there. You might be filtering or out of range.

Plain-English Translations

Fast Troubleshooting

1. Volume: Turn it up.
2. Power: Battery seated and charged.
3. Channel: Everyone on the same channel.
4. Privacy codes: Turn off to test.
5. Distance/terrain: Move higher or closer.

A–Z Jump

A

ACK / Acknowledge

A confirmation that you received a message (example: “Copy” or “Confirmed”).

Adapter

A small connector that lets different antenna or cable types fit together.

Adjacent Channel Interference

When a nearby channel’s signal spills over and makes your channel hard to hear.

Antenna

The part that sends and receives the radio signal. A better antenna and higher placement often improves range more than “more power.”

Antenna Gain

How much an antenna focuses radio energy in useful directions. More gain can improve range in some directions.

Antenna Height

How high the antenna is above ground. Height often matters more than power for range.

Audio Distortion

Speech sounds harsh or unclear because of too much mic level, overdriving the mic, or a poor signal.

Automatic Squelch

A feature that reduces background hiss when nobody is transmitting.

B

Backlight / Display Timeout

Screen light and how long it stays on. Shorter timeouts save battery.

Backup Channel

A pre-planned second channel your group switches to if the primary is busy.

Battery Saver / Power Save

A mode that reduces battery drain by cycling the receiver on/off when idle.

Base Antenna

An antenna mounted at a fixed location like a house or cabin.

Base Station

A radio set up at a fixed location, usually with better power and antenna.

BCL (Busy Channel Lockout)

Busy Channel Lockout (BCL). Prevents transmitting when the channel is already in use.

BNC Connector

A quick-connect antenna connector used on some radios.

Busy Indicator

A screen icon/light that shows the channel is active (someone is transmitting or noise is opening squelch).

C

Call Sign

Your FCC-issued ID for GMRS. Required to identify legally.

Call Tone

A loud “attention” tone some radios can send before voice (use sparingly).

Carrier Squelch (CSQ)

Carrier Squelch (CSQ). Opens the speaker for any signal, with no tone filtering.

Channel

A preset selection on the radio that combines a frequency and settings.

Channel Lock

Prevents accidental channel changes.

Channel Memory

A saved channel entry in the radio’s memory (frequency + settings).

Channel Name / Alias

A label shown on the radio screen instead of a number.

Channel Numbers (GMRS)

The numbered channels (1–22) used on most GMRS radios. Different numbers map to specific frequencies.

Channel Plan

Your group’s agreed-on use of primary, backup, and repeater channels.

Channel Scan

Automatically checks multiple channels for activity.

Cloning

Copying channel settings from one radio to another (by cable or radio-to-radio).

Coax / Coaxial Cable

The cable between the radio and the antenna (also called feedline).

Co-Channel Interference

Two users on the same channel talking at the same time.

Codeplug

A saved configuration file or template of channel settings (common on programmed radios).

Compander

Audio processing that can make voices clearer in noise.

Courtesy Tone

A short beep from a repeater after someone unkeys.

CPS (Customer Programming Software)

Customer Programming Software (CPS). The manufacturer’s software used to program channels and settings.

CTCSS (Continuous Tone-Coded Squelch System)

Continuous Tone-Coded Squelch System (CTCSS). A sub-audible tone used as a “privacy code” to filter what you hear (not encryption).

CSQ vs Tone Squelch

CSQ (no tone filtering) hears everything. Tone squelch hears only signals with the correct tone.

D

DCS (Digital-Coded Squelch)

Digital-Coded Squelch (DCS). A digital version of a privacy code used to filter what you hear (often labeled DCS or DPL).

Dead Spot

An area where signals are weak or blocked.

Desense

Strong nearby signals overload a radio and reduce its ability to hear weaker ones.

Deviation

How wide the signal swings in frequency; affects audio loudness and clarity.

DPL (Digital Private Line)

Digital Private Line (DPL). A common label for DCS privacy codes (still not encryption).

Dual Watch / Dual Receive

Listening to two channels at once (example: your primary channel plus weather or a repeater).

Duplex

Using different frequencies to transmit and receive (repeaters).

E

Emergency Break

Interrupting traffic to pass urgent life-safety information.

ERP (Effective Radiated Power)

Effective Radiated Power (ERP). Actual power sent in a useful direction after antenna gain and losses.

F

Factory Reset

Restores a radio to default settings.

Fading

Signal strength rises and falls due to movement, buildings, or terrain.

Feedline

Another word for coaxial cable between radio and antenna.

Fresnel Zone

The football-shaped “clear space” around the straight line between two antennas that should stay mostly unobstructed for best range.

Frequency Mode vs Channel Mode

Frequency mode lets you enter a frequency directly. Channel mode uses saved memories (most family use is channel mode).

G

GMRS (General Mobile Radio Service)

General Mobile Radio Service (GMRS). A licensed family radio service that can use repeaters.

Ground Plane

A metal surface or system that helps some antennas work properly (common on vehicle mounts).

H

Handheld (HT)

A portable, hand-carried radio (often called an HT for handheld transceiver).

Harmonics

Unwanted signals at multiples of the main frequency that can cause interference.

High / Low Power

Transmit power settings. High can improve reach, but height/antenna often matters more.

I

Input (Repeater)

The frequency you transmit on to reach the repeater (uplink).

Intermod (Intermodulation)

Intermodulation (Intermod). False signals created by mixing strong nearby transmitters.

Interstitial Channels

The lower-power GMRS channels between main channels (often used for short-range). Exact behavior depends on radio and rules.

J

Kerchunk

Keying a repeater briefly without speaking. Considered poor etiquette unless testing with permission.

K

Keypad Beep

Button tones. Turn off if you want quieter operation.

Keypad Lock

Prevents accidental setting changes.

L

Last Known Location (LKL)

The last confirmed place someone was seen or heard from.

Line of Sight

Clear visual path between antennas for best signal.

Linked Repeaters

Repeaters connected together to cover a wide area.

M

Main Channels

The primary GMRS channels commonly used for general communications (distinct from repeater channels).

Magnetic Mount

A vehicle antenna base that sticks to metal with a magnet.

Message Priority

A simple way to rank messages: Routine, Urgent, Emergency.

Mic Technique

Speaking clearly, close enough to the mic, without shouting.

Monitor Button

Temporarily opens squelch so you can hear weak signals and background noise.

Multipath

Signals arriving by multiple paths, causing distortion or fading.

N

Narrowband / Wideband

Different channel widths that affect audio loudness and compatibility. Use what your group radios support and match each other.

Net

A scheduled, organized on-air session (can be as simple as a family check-in).

NOAA Weather Channels

Broadcast channels that provide weather forecasts and alerts (receive-only on most radios).

NMO Mount (New Motorola Mount)

New Motorola Mount (NMO). A common, rugged standard for mounting vehicle antennas.

O

Offset

The frequency difference between repeater input and output (GMRS repeaters commonly use a fixed offset).

Open Repeater

A repeater that allows general use (still follow the owner’s rules and access tone requirements).

Output (Repeater)

The frequency you listen to from the repeater (downlink).

P

PL Tone (Private Line)

Private Line (PL). A common name for CTCSS privacy tones (still not encryption).

Priority Scan

A scan mode that checks one important channel more often.

Privacy Code

CTCSS or DCS used to filter what you hear. It does not hide your transmission.

Programming Cable

A cable used to connect a radio to a computer for programming channels/settings.

Q

Quiet Channel

A channel with little or no traffic.

R

Read-Back

Repeating critical info to confirm accuracy.

Repeater

A system that receives your signal and retransmits it to extend range.

Repeater Access Tone

The required CTCSS/DCS tone to activate a repeater (also called TX tone).

Repeater Channels

GMRS channels used to listen to repeater outputs (your radio transmits on the paired input automatically when configured).

Repeater Tail

The brief open-squelch sound after a repeater transmission ends.

Reverse / Tone Monitor

A function that lets you temporarily hear without tone filtering (useful for troubleshooting tone issues).

RF Noise (Radio Frequency Noise)

Radio Frequency Noise (RF noise). Unwanted signals from electronics that can block weak communications.

Roger Beep

A beep your radio makes when you release PTT. Often best turned off for group operations.

RSSI (Received Signal Strength Indicator)

Received Signal Strength Indicator (RSSI). A signal strength reading shown on some radios.

RX Tone

Receive tone. A tone setting that makes your speaker open only when the incoming signal has the correct tone.

S

S-Meter

A signal strength meter on some radios (often shown as bars or an “S” scale).

Scan List

The set of channels included when scanning.

Shielding

Using metal enclosures or routing techniques to reduce interference from electronics.

Signal Bars

A simple on-screen representation of signal strength.

Simplex

Direct radio-to-radio communication on one frequency.

SITREP (Situation Report)

Situation Report (SITREP). A short update: what’s happening, where, and what you need.

SMA (SubMiniature version A)

SubMiniature version A (SMA). A common antenna connector type used on handheld radios and antennas.

SMA Male / SMA Female

Refers to whether the connector has a center pin (male) or center socket (female). Must match your radio’s connector type.

Squelch

A control that blocks hiss when signals are weak or absent.

Squelch Tail

The noise burst heard when a signal drops.

Sub-Audible Tone

A low tone sent with voice that most people can’t hear, used for CTCSS “privacy codes.”

T

Time-Out Timer (TOT)

Time-Out Timer (TOT). Limits how long you can transmit continuously.

Tone Number

The menu number assigned to a CTCSS/DCS tone on your radio (different brands may use different lists).

Tone Search

A feature that helps detect which privacy tone an incoming signal is using (useful when setting up repeater access).

Tone Squelch

Opens the speaker only for the correct privacy tone.

Traffic

Any radio transmissions on the channel (“channel traffic”).

Transmit Power

How strongly your radio transmits. More power helps sometimes, but antenna height and placement usually matter more.

TX Tone

Transmit tone. The CTCSS/DCS tone your radio sends to access a repeater or to open another radio’s tone squelch.

TX Inhibit

A setting that prevents transmitting on certain channels (useful for receive-only channels like weather).

U

Uplink

Another term for the repeater input frequency.

Urban Attenuation

Signal loss caused by buildings, metal structures, and dense city environments.

V

VOX (Voice-Operated Transmit)

Voice-Operated Transmit (VOX). The radio transmits automatically when it hears your voice.

VOX Delay

How long the radio stays keyed after you stop talking.

VOX Sensitivity

How easily VOX triggers. Too sensitive can cause accidental transmissions from noise.

W

Weather Channels

NOAA broadcasts that provide weather alerts.

Wideband / Narrowband

Channel width settings. Mismatches can make audio too quiet or distorted between different radios.

X

X-Band (Cross-Band) Repeater

A system that links different frequency bands (rare in GMRS but seen in some setups).

Y

Yield

Stop transmitting to allow higher-priority traffic.

Z

Zone (Scan Zone)

A grouped set of channels used for scanning.

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