Crystal Audiovideo DBH20-80, DBH05-80, DBH09R-80 manual Operating the unit

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Operating the unit

Turning unit on/off: 1‐ Switching on

Press and hold the MENU/PWR until you hear a beep sound.

2‐ Switching off

Press and hold the MENU/PWR until you hear a beep sound.

Adjusting the Volume:

You have 8 preset volume levels. They are displayed on the LCD screen. To raise the volume press the up button and to decrease the volume, press the down button.

Lock & Unlock the device.

Press and hold CALL button for 3 seconds to lock the device.

Press and hold CALL button for 3 seconds to unlock the device.

Auto scan.

Press & hold the MONI button for 3 seconds to activate auto scan.

Press & hold the MONI button for 3 seconds to deactivate auto scan.

Changing Channels:

You have a maximum of 80 channels at your disposal. To communicate with another device, you must both be on the same channel.

To change channels, once you have turned your unit on, you need to press the MENU/PWR once and use the up/down buttons to scroll through to your desired channel. To set your desired channel, press the MONI button or wait up to 10 seconds.

Your unit is simplex “one way at a time”. While you are speaking, you can not receive a transmission.

Your unit is an open‐license band. Always identify yourself when transmitting on the same channel.

IMPORTANT: Before transmitting on a UHF channel listen to ensure it is not already in use.

Transmitting (sending speech)

The unit is continuously in the Receive mode when the unit is turned ON and not transmitting. When a signal is received on the current channel, “RX” icon will be displayed on the LCD screen. a. Press and hold the PTT (Push to Talk) button to transmit your voice. The transmit signal icon “TX” will display on the LCD screen. b. Hold the unit in a vertical position with the Mic (Microphone) 5 cm away from the mouth. While holding the PTT button, speak into the microphone in a normal tone of voice. c. Release the PTT button when you have finished transmitting.

For others to receive your transmission, they must be on the same channel as you.

Call‐Ring tone

You can use the CALL button to send a tone to other users on the same channel. To activate this feature; a. With the unit in normal mode, press and release the CALL button. The unit will transmit a 2‐second page tone to the other unit/s set with the same channel within transmitting range. NOTE: This function is only possible every 60 seconds.

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Contents Page Technical Assistance Safety Information and Warnings Exposure to Radio Frequency Energy Radio Operation and EME Exposure Transmit and Receive ProcedureElectromagnetic Interference/Compatibility AircraftInstallation Transmitting Range Low Battery Meter IndicatorPage Operating the unit Roger Beep Page UHF channels and frequencies