Dynascan P-72 - User Manual

Questions and Answers

C
Christine WatsonAug 5, 2025
What to do if Dynascan P-72 does not transmit when pressing PTT?
- J
  Justin EdwardsAug 5, 2025
  If your Dynascan Transceiver does not transmit when pressing the PTT button, there might be several reasons: 1. The microphone may not be correctly installed. Turn off the transceiver and ensure the microphone jack is plugged in until you hear a click. 2. The Offset might be out of the transmission operation range band. Try disabling the frequency Offset function. 3. The busy channel lockout function could be enabled. In this case, disable the busy channel lockout.
L
Lisa BaileyAug 11, 2025
How to fix Dynascan P-72 Transceiver that does not turn on?
- T
  Thomas FrazierAug 11, 2025
  If your Dynascan Transceiver doesn't turn on after connecting to a 13.8 VDC power supply and pressing the ON/OFF key, it could be due to these reasons: 1. The polarity of the DC power cable might be inverted. Ensure you connect the DC power cable correctly, with the red cable to the positive terminal and the black cable to the negative terminal. 2. One or more fuses might be blown. Identify and resolve the issue that caused the fuse to blow. Once fixed, install a new fuse with the same specifications.
C
cjoyceAug 17, 2025
Why most keys and MENU knob don't operate on Dynascan Transceiver?
- L
  Lauren DavisAug 17, 2025
  If most keys and the MENU knob on your Dynascan Transceiver aren't working, it could be due to a couple of reasons: 1. The lock function might be activated. Try disabling the lock function. 2. The transceiver could be in channel display mode. Remember that under channel mode, you can only input the channel number; frequency input is only possible under VFO mode.
A
Anna PriceAug 23, 2025
What to do if I cannot change frequency on Dynascan P-72 Transceiver?
- M
  meyerlauraAug 23, 2025
  If you cannot change the frequency on your Dynascan Transceiver by rotating the MENU knob or pressing the microphone UP/DWN keys, the transceiver might be in call channel mode. Press the VFO key to switch to frequency adjustment mode.
B
Bobby VillaAug 29, 2025
Why can't I select a memory channel on my Dynascan P-72 Transceiver?
- R
  Ryan AndersonAug 29, 2025
  If you cannot select a memory channel on your Dynascan Transceiver by rotating the MENU knob or pressing the microphone UP/DWN keys, it is likely because there are no parameters stored in the memory channel. To resolve this, store some channels into the memory channel.

Summary

Definitions and Compliance

Introduction to the Transceiver

Safety Cautions

Maintenance Procedures

Installation Guide

5.1.- Mobile Installation

Guidance on installing the transceiver in a vehicle, including bracket mounting.

5.2.1.- Mobile DC Power Cable Connection

Instructions for connecting the DC power cable for mobile use, emphasizing correct polarity.

5.2.2.- Fixed Station Power Connection

Steps for connecting the transceiver to an external 13.8V DC power supply.

5.2.3.- Fuse Replacement

Procedure for replacing blown fuses and troubleshooting related issues.

5.3.- Antenna Installation

Proper antenna connection and adjustment for optimal transceiver performance.

5.4.- Accessories Installation

Guidance on installing various accessories like speakers and microphones.

5.4.1.- Speaker-Mic;Headset Installation

How to install external speakers or headsets with microphones.

5.4.2.- Microphone Connection

Connecting the supplied microphone to the transceiver's RJ45 jack.

5.4.3.- Keypad Operations

Explanation of basic keypad operations like pressing and holding keys.

Getting Acquainted with the Transceiver

6.1.- Front Panel Key Functions (Part 1)

Description of ON/OFF, CALL/C.IN, VFO/MR, and VOL/SCAN keys on the front panel.

6.1.- Front Panel Key Functions (Part 2)

Description of SQL/MONI, TONE/T.SEL, B/E, PTT/CRL keys, and LED indicator.

6.1.- Front Panel Jacks, Display & Knobs

Details on MIC/PC jack, LCD display, and rotary knob operations.

6.2.- LCD Display Icons

Explanation of icons displayed on the transceiver's LCD screen.

6.3.- Rear Panel Connections

Description of ANT terminal, heat sink, external power plug, and mounting screws.

6.3.- Side Panel Audio Jacks

Details on SP/MIC jacks for headsets and external speakers.

6.4.- Speaker-Microphone Components

Overview of speaker, PTT button, and keypad functions on the microphone.

6.4.- Microphone Features

Description of microphone, LED indicator, and PF keys (PF1-PF4) functionality.

6.5.- Definable Keys Programming

Procedure to program the four definable keys on the speaker-microphone.

6.6.- Select Operating Band

Procedure to switch between upper and lower operable bands using the PTT/CTRL key.

6.7.- Frequency Input Method

Methods for inputting desired frequencies using the microphone keypad.

Basic Operation Procedures

Speaker-microphone input mode

Direct frequency entry using the speaker-microphone keypad.

Shift input mode

Step-by-step frequency input using the menu and keypad.

7.1.- Switching Power On;Off

How to turn the transceiver on and off using the ON/OFF key.

7.2.- Volume Setting

Steps to adjust the transceiver's volume output level.

7.3.- Mute Mode

Activating and deactivating the mute function using the VOL/SCAN key.

7.4.- Squelch Level Setting

Adjusting the squelch level to filter out unwanted signals.

7.5.- Select Transmission Band

Procedure to select the active transmission band using the PTT/CLR key.

7.6.- Single;Dual Band Operation

How to operate the transceiver in single or dual band modes.

7.7.- Select Operating Band; Display Mode

Switching between memory channels and various display modes.

7.8.- Calling Channel Mode

Using the calling channel mode for quick access or emergency communication.

7.9.- Transmitting

Instructions for transmitting, including microphone technique and power levels.

Settings Menu Navigation

8.1.- Menu Access

Steps to enter and navigate the transceiver's settings menu.

8.2.- Settings Menu Table

Detailed table of menu options, selections, and defaults.

8.3.- Channel Naming

Procedure for naming memory channels with custom text.

8.4.- Character Input from Microphone Keypad

Guide to entering characters using the microphone keypad with a character map.

8.5.- Operation via Repeater

Procedures for operating the transceiver via repeaters.

8.5.1.- Offset Programming

Programming frequency offsets for repeater communication.

8.5.2.- Offset Direction

Setting the direction (positive/negative) for frequency offsets.

8.5.3.- Offset Step Range

Configuring the step value for frequency offsets.

Advanced Operation Features

9.1.- Keypad Operation and Description

Detailed explanation of individual keypad operations and their functions.

9.2.- Keypads Combined Operation

Functions resulting from combined key presses on the transceiver.

9.3.- Delete Memory Channel

Step-by-step guide to deleting stored memory channels.

9.4.- Turn CTCSS;DCS On;Off

How to enable or disable CTCSS/DCS tones for communication.

9.5.- Choose CTCSS Tone or DCS Code

Selecting specific CTCSS tones or DCS codes for transmission and reception.

9.6.- Reverse Function

Activating the reverse function to swap TX and RX frequencies for repeater use.

9.7.- Store Frequency on Memory Channel

Procedure for saving frequencies and parameters to memory channels.

9.8.- FM Radio Operation

Procedures for operating the FM radio function.

9.8.1.- Storing FM Radio Frequency

Steps to store a desired FM radio frequency.

9.8.2.- Stored FM Radio Frequencies

Accessing, deleting, or playing stored FM radio frequencies.

9.8.3.- FM Mode Manual;Auto

Selecting between manual frequency tuning and automatic scanning in FM mode.

9.8.4.- Audio Output Mode

Configuring the audio output source for the transceiver.

9.8.5.- FM Volume Setting

Adjusting the volume level for FM radio playback.

9.9.- Scan Function

Introduction to the scan functions for monitoring channels and frequencies.

9.9.1.- Scan ON;OFF

Turning the scan function on or off to monitor activity.

9.9.2.- VFO Scan

Scanning all frequencies within the current VFO band.

9.9.3.- Channel Scan List

Scanning through a predefined list of memory channels.

9.9.4.- Scan OFF

Turning off the scan function and returning to normal operation.

9.9.5.- Scan Mode

Selecting scan modes: Time (TO), Carrier (CO), or Search (SE).

9.9.6.- Scan List Management

Information on creating and managing scan lists for up to 255 channels.

9.9.7.- Scan List Operation

Checking and managing the contents of the current scan list.

Technical Specifications

10.1.- General Specifications

General technical specifications including frequency range, voltage, and dimensions.

10.2.- Transmitter Specifications

Technical specifications related to the transmitter's output power and modulation.

10.3.- Receiver Specifications

Technical specifications for the receiver, including sensitivity and selectivity.

Troubleshooting Common Issues

Dynascan P-72 Specifications

General

Brand	Dynascan
Model	P-72
Category	Transceiver
Language	English

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