RF20 – EPM handheld transceiver

a) in all operation modes
• automatic self-test after power-up, with failure indication on the transceiver display (BITE);
• operational data programming from external units;
• emergency erasure of operation data on fixed frequency channels, including encryption unit codes and information for FH networks including TRANSEC and COMSEC;
• transmission of tone calling (1000 ± 200) Hz, in VHF III band (1750 ± 25) Hz;
• acoustic signaling switching on/off by transceiver operator;
• display and keypad backlight activation;
• adjustable display contrast;
• battery pack voltage signaling;
• transmission power signaling on the display, transmission signaling by LED on the top panel;
• “reception only” mode, with transmission disabled;
• whisper mode with increased microphone sensitivity and decreased audio volume;
• displaying of servicing information – firmware;
• position, velocity and time display on the LCD with GPR23 receiver connected;
• easy to control;
• transceiver remote control via PRC20 protocol;
• automatic transition from increased output to nominal output with dropped nominal supply voltage;
• possibility of using bag for modular carrying system.

b) in fixed frequency mode
• max. 10 presets from the entire frequency range, fewer preset channels if occupied by FH networks;
• simplex or semi-duplex operation;
• 150 Hz sub-tone squelch or signal squelch (only signal in VHF II);
• voice operation via internal encryption unit compatible with RF13, RF2050, RF23 – in FM ranges;
• transmission and reception of short encrypted messages – FLASH, with the opposite transceiver identification;
• data transmission according to MIL-STD-188-220 (NET);
• channel parameter programming from keypad;
• preset channel scanning;
• operation frequency setting in 6.25 kHz, 8.33 kHz, 25 kHz or 1 MHz steps;
• transmission band for digital voice and data transmission 16 kbit/s according to STANAG 4204, edition 2.

c) in FH operation
• max. 6 network presets;
• operation in frequency range 30.000 MHz to 87.975 MHz;
• secure operation TRANSEC and secret operation COMSEC;
• simplex or semi-duplex operation with frequency hopping;
• compatibility with RF2050 and RF23 transceivers and RX2050 receiver on simplex and semi-duplex channels;
• selectable frequency hopping operation mode – FH, DFF, FCS, MIX and IFF with quick transition to HLC, HLG or HLA;
• communication on the channel with a continuous carrier;
• iso-fixed frequency operation mode;
• establishing of connection with fixed frequency transceivers through HLC and HLG monitoring;
• 121.500 MHz (HLA) frequency monitoring and transition to HLA with transmission disabled;
• late net entry with synchronization request;
• master transceiver switching depending on the network condition;
• transmission of warning message to all network participants;
• all transceivers authentication request;
• MASTER transceiver selective communication with a selected slave transceiver;
• transmission and reception of short text message, maximum 156 characters;
• preparation, saving and reading of up to 10 short text messages;
• transmission over notification (BREAK IN) by all transceivers;
• INTERLEAVING switching off for close-to-the-limits communication;
• data transmission at adjustable rates – 7100 bit/s, 4800 bit/s and 2400 bit/s (P2P);
• data transmission according to MIL-STD-188-220 (NET);
• CW mode suitable for use with external frequency converters;
• G-track, sending position reports via radio channel (with GPR23 receiver connected);
• own position sending by SMS (with GPR23 receiver connected).