User manual NAVICOM RT-300

[. . . ] PLL (Phase Lock Loop) Controlled Circuitry ---- Provides accurate and stable channel selection. Squelch Adjustment ----------------------- help eliminate noise between transmissions. Key Lock ----------- lets you lock the keypad in order to prevent the controls from accidental pressing. High/Low Power Selection ---- lets you save power by selecting a suitable transmitting power for long or short distances. [. . . ] Squelch is used to eliminate static and background noise and allows for silent operation of your RT300 until a transmission is received. If the squelch is too high, only the strongest transmissions can be heard, and when too low, intermittent static and noise are heard. Selecting High/Low Power or Lock keypad Press and release this key to toggle the transmit power between high and low. When the unit is operating at low power, "Lo" appears on LCD and "Hi" appears on LCD when operating at high power. You also can lock your radio keypad to avoid accidental pressing of keys by activating the key lock. Pressing and holding Hi/Lo-Lock button key lock icon will appear on LCD if it is enabled. The function is effective to all keys except PTT and Hi/Lo-Lock buttons. Selecting Channels Press the channels. / (UP/DOWN) button to scroll through the available Note: Not all channel numbers are available in INT bands. Transmitting and Receiving Press and hold the Push-To-Talk (PTT) key to transmit on the selected channel, then release to receive. The TX indicator appears while transmitting. 6 Scanning Features Your RT300 is equipped with three types of scan options: All Scan, Saved(Memory) Scan and Priority Scan. This function automatically searches for transmissions on the channel set being scanned. If a TX signal is received, the scan stops on the receiving channel as long as it is present and the SCAN indicator flashes. During the Scan Modes: Press the Channel / (UP/DOWN) button to change the scan direction. All Scan Press and release the SCAN button when no channels are stored in memory to activate the All Scan function. In All Scan mode, all channels in the channel set are scanned in sequence, assuming no channels have been stored in memory. Saved (Memory) Scan Press and release the SCAN button when there is at least one channel in memory to activate the Saved Scan function. In Saved Scan mode, only the channels that have been saved in memory are scanned in sequence. After the last saved channel number has been scanned, the cycle repeats. 7 Adding Channels to Memory Your RT300 can store any channel (including Private Channels). The stored channels are the ones scanned in the Saved (Memory) Scan mode. During normal operation mode, use the UP or DOWN key to select the desired channel for programming. The "M" icon appears to indicate the current channel has been saved in memory. During the normal mode, use the UP or DOWN key to select the channel to be deleted. [. . . ] Press and release the 16 button to terminate Tri Watch mode and switch to the Priority Channel. Note: During Tri Watch Mode, the SCAN, and Channel / keys are inactive and sounds an error beep if pressed. (UP/DOWN) Resetting your Radio You can reset many radio settings back to their factory defaults, this will: · Erase any channels stored in memory · Return to International channels, if another mode is selected · Only For US version · Return power settings to their original state To perform the reset: 1. The LCD remains blank for 2 seconds, and then the unit switches to channel 16. 9 Using the Batteries When the battery level is low, Please replace the batteries. Before replacing the batteries, the volume control must be rotated fully counterclockwise, until a click is heard, to turn the power OFF. [. . . ]