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. [. . . ] 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. If there are no channels in memory, the default is All 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. If the signal is lost for five seconds, the radio resumes scanning. During the Scan Modes: Press the Channel / (UP/DOWN) button to change the scan direction. UP increments the channel while DOWN decrements it. Press and release the SCAN button to terminate the SCAN mode. DW/TRI button do not function and sound an error beep if pressed. Note: Scan modes are disabled when the ATIS operation is active. All Scan Press and release the SCAN button when no channels are stored in memory to activate the All Scan function. The SCAN indicator appears on the LCD during All Scan. In All Scan mode, all channels in the channel set are scanned in sequence, assuming no channels have been stored in memory. After the last channel number has been scanned, the cycle repeats. 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, the SAVED and SCAN indicators appear on the LCD. 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. Press and hold the SCAN / MEM key for 3 seconds. [. . . ] While continuing to hold these keys, power the radio ON. 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. You can replace the old batteries just with 4 new AA size battery cells. [. . . ]