AT RF2050 ECCM mobile multiband transceiver, belonging to the AT RF20 family of multiband tactical radios with increased resistance to radioelectronic warfare, is designed for installation into any kind of tracked or wheeled vehicles. Small footprint, robust design and outstanding features add to its great utility, especially in modernization of the existing vehicular installations. AT RF2050 transceiver is produced in two variants: without co-site filter var. 01 and with co-site filter var.02. The built-in modem ensures data communication in tactical IP networks according to MIL-STD-188-220B.
Operating features
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;
• acoustic signaling switching on/off by transceiver operator;
• transmission of tone calling (1000 ± 200) Hz, in VHF III band (1750 ± 25) Hz;
• display and keypad backlight;
• adjustable display contrast;
• transmission power signaling on the display, transmission signaling by LED on the top panel;
• operation channel signal reception signaling by a LED on the transceiver panel;
• transmitter overheat signaling LED on the transceiver panel with automatic switching to lower power output;
• signaling of active mode with co-site filter (version 2310.100.01);
• optional external cooling box for improved cooling efficiency;
• “reception only” mode, with transmission disabled;
• whisper mode with increased microphone sensitivity and decreased audio volume;
• loud received signal monitoring with volume regulation and LED signaling;
• configurable transceiver output for operation with antennas for VHF I, VHF II and VHF III tactical bands;
• displaying of servicing information – firmware;
• easy to control.
b) in fixed frequency mode
• max. 10 presets from the entire frequency range 25 MHz to 145.9875 MHz, 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, RF20;
• transmission and reception of short encrypted messages – FLASH, with the opposite transceiver identification;
• channel parameter programming from keypad;
• preset channel scanning;
• data transmission according to MIL-STD-188-220B compatible with modems MD13.1, MD13.2;
• direct dialing when calling from transceiver to a fixed telephone network;
• 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;
• o p e r a t i o n i n f r e q u e n c y r a n g e 3 0 . 0 0 0 MHz t o 87.975 MHz;
• secure operation TRANSEC and secret operation COMSEC;
• compatibility with RF20 transceiver;
• selectable frequency hopping operation mode – FH, DFF, FCS and MIX, or SFH, SDFF, SFCS and SMIX with quick transition to HLC, HLG or HLA;
• 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;
• MASTER transceiver authentication request;
• MASTER transceiver selective communication with a selected slave transceiver;
• transmission and reception of short text message, maximum 156 characters;
• transmission over notification (BREAK IN) by MASTER transceiver;
• INTERLEAVING switching off for close-to-the-limits communication;
• data transmission at adjustable rates – 7100 bit/s, 4800 bit/s and 2400 bit/s.
Technical parameters
Frequency range
25.0000 MHz to 145.9875 MHz
Nominal input/output impedance
50 Ω
Frequency ranges
HF
25.000 MHz to 29.975 MHz
VHF I
30.000 MHz to 108.000 MHz
VHF II
117.975 MHz to 140.000 MHz
VHF III
140.0250 MHz to 145.9875 MHz
Type of modulation
HF
F3E (FM)
VHF I
F3E (FM)
VHF II
A3E (AM)
VHF III
F3E (FM)
Channel spacing
HF
25 kHz
VHF I
25 kHz; 12.5 kHz; 6.25 kHz
VHF II
25 kHz; 8.33 kHz
VHF III
25 kHz; 12.5 kHz
Number of operation channels with 25 kHz spacing
HF
200
VHF I
3121
VHF II
882
VHF III
239
Preset channels
10
Monitored channels in all special operation modes
3 (two selectable, third fixed – 121.500 MHz)
Maximum number of programmable nets
6
Special operation modes (usable in 30 MHz to 88 MHz band)
FH
frequency hopping
DFF
digital fixed frequency
FCS
free channel search
MIX
mixed operation FH and FCS
SFH
secure frequency hopping
SDFF
secure digital fixed frequency
SFCS
secure free channel search
SMIX
mixed mode SFH and SFCS
Time to initial synchronization
max. 7 s
Time of autonomous synchronization holding
48h
Minimum number of operation frequencies for FH operation
4
Hopping rate
100 hops/s
Interface for data transmission
USB/RS232
Power supply (according to MIL-STD-1275B)
Nominal supply voltage
12 VDC or 24 VDC
Limit supply voltage
10 VDC to 33 VDC
Current consumption
• Transmission - nominal output power (at 12 V)
25 A
• Transmission - nominal output power (at 24 V)
12 A
Transmitter parameters
Nominal output power
FM 50 W
Nominal output power
AM 15 W
Reduced output power
FM 5 W
Reduced output power
AM 2 W
Harmonic suppression
min. 60 dB
Spurious suppression at ∆f > 25 kHz
min. 70 dB
Time of continuous operation at +50 °C at duty cycle reception : transmission = 1 : 1
without limit
Average ranges in medium undulated terrain at nominal power FF mode (with antenna 2.55 m)
25 km
Receiver parameteres
Sensitivity (VHF I, VHF II, VHF III)
0,5 μV at 12 dB SINAD
Sensitivity (HF)
0.6 μV at 12 dB SINAD
AF output
1 W
Range of effectively transmitted frequencies
• voice
300 Hz to 3000 Hz
• data
10 Hz to 11000 Hz
Environmental specification (according to MIL-STD-810E)
Operating temperatures
-30 °C to +60 °C
EMI
according to MIL-STD-461E
Mechanical specification
Dimensions [w x h x d]
• without cooling block
202 mm x 210 mm x 186 mm
• with cooling block
202 mm x 231 mm x 186 mm
Weight
• without co-site filter
8.5 kg
• with co-site filter
9 kg
Package
ECCM mobile transceiver package AT RF2050
Accessories
Mobile set frame
Handset RF13.3
Handset holder
Power supply cable 3 m
Grounding
Vehicle antenna VHF 2.6 m
Vehicle whip antenna MO13.50
Vehicle whip antenna with magnetic holder MO13.51
Groundplane antenna
Discon antenna
Log-periodic antenna
Telescopic mast 9 m
Telescopic winch driven mast 10 m
Handheld microphone/speaker RM1301
Fill gun set PK20
CD for modem configuration ModEx
Cooling block
Antenna cable (3 m)
Antenna cable (10 m)
PC interconnection cable
RF headsets
HS headsets AT RF2050 MultiBand Mobile Transceiver
