Barrett 2050 HF transceiver
Using measurement methods described in Australian/New Zealand Standard AS/NZS 4770:2000
General Specifications
Equipment BARRETT 2050 transceiver local (desktop) and remote (trunk mount) configurations
Standards Exceeds/complies with Australian/ New Zealand standard AS/NZS 4770:2000 and AS/NZS 4582:1999 Exceeds/complies with European standard ETSI 300 373 and associated Amendment A Exceeds/complies with EMC and vibration standard IEC 945 Complies with MIL Spec. 810 F for drop, dust, temperature, shock and vibration. ALE to MIL-STD-188-141B
Transmit frequency range 1.6 MHz to 30 MHz (continuous)
Receive frequency range 500 kHz to 30 MHz (continuous)
Channel capacity Up to 500 programmable channels (simplex or semi-duplex)
Frequency resolution 10 Hz program mode 1 Hz tunable receiver
Frequency stability ±10 Hz or better than 0.3 PPM over temperature range - 30°C to + 70°C
Intermediate frequencies 45 MHz and 455 kHz (double conversion)
Operating modes J3E (USB, LSB) - H3E (AM) - J2A (CW) - J2B (AFSK) Optional J2B (AFSK) with narrow filter
Operating temperature -30°C to +60°C (-35°C to +70°C at reduced specification)
Humidity 95% relative, non-condensing
Display system Super-twist backlit LCD graphics display 128 x 64
Controls 23 key keypad - illuminated
Programming interfaces Infrared (IR) and RS-232
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Supply voltage 13.8V DC + 20% / - 10% (negative ground) Polarity protected. Over voltage protected
Current consumption 470mA receive (muted, back lighting off)
Antenna impedance 50 Ohms unbalanced
Weight 2050 local control configuration 2.58Kg. 2050 remote (trunk mount) configuration, main unit 2.36Kg. 2050 remote (trunk mount) configuration, control head 0.22Kg.
Dimensions 2050 local control configuration 185mm W x 270mm D x 70mm H 2050 remote (trunk mount) configuration, main unit 185mm W x 235mm D x 70mm H 2050 remote (trunk mount) configuration, control head 185mm W x 33mm D x 70mm H
Selcall system Based on CCIR 493-4, four and six digit systems. Protocol available for free distribution. Also true CCIR standard and other manufacturers’ emulation
Scan types Selcall, Voice (syllabic), AGC derived signal level
Scan channels 8 scan tables, each with up to 30 channels
Scan rate Selcall Scan - Fixed at 500mS Non Selcall scan - Adjustable from 100mS to 5 secs
Switching speed Less than 15mS Tx to Rx, Rx to Tx
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Receiver Specifications
Sensitivity -120dBm (0.224µV) for 10dB SINAD - J3E Mode pre-amp on -115dBm (0.398µV) for 10dB SINAD - J3E Mode pre-amp off
-110dBm (0.708µV) for 20dB SINAD - J3E Mode pre-amp on -105dBm (1.260µV) for 20dB SINAD - J3E Mode pre-amp off
Selectivity J3E -1 kHz and +4 kHz better than 50dB -2 kHz and +5 kHz better than 55dB -5 kHz and +8 kHz better than 60dB
Selectivity J2B (optional) -500 Hz and + 500 Hz better than 60dB
The level of an unwanted signal above the level of a wanted signal that will reduce the SINAD of the wanted signal from 20dB SINAD to 14dB SINAD
Blocking (max. usable sens.) -20 kHz and +20 kHz better than 71dB
The level of an unwanted signal above the level of a wanted signal that will reduce the SINAD of the wanted signal from by 6dB or cause and output level change of 3dB
Blocking (+60dbuV wanted) -20 kHz and +20 kHz better than 60dB (+110dBµV)
The level of an unwanted signal above the level of a wanted signal that will reduce the SINAD of the wanted signal from by 6dB or cause and output level change of 3dB
Intermodulation better than 89dBµV
The level of two unwanted signals, that is within 30 kHz of the wanted signal, above the level of a wanted signal that reduces the SINAD of the wanted signal to 20dB
Spurious response ratio Better than 70dB
Reciprocal mixing Better than 105dBµV
In-band IMD Better than 34dB
Clarifier range Receive only 1 Hz steps up to ±1 kHz (dependant on configuration)
AGC efficiency Range - less than 6.0dB variation with an input signal producing 20dB SINAD max usable sensitivity level to a signal 70dB above that
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AGC efficiency Increase in SNR - Increasing the input signal level 20dB from the 20dB max usable sensitivity level increases the SINAD by at least 15dB to greater than 35dB
Audio Output 4W into 4 Ohms, 2W into 8 Ohms at less than 5% distortion
Audio output impedance 2 to 80 Ohms
Audio response Less than 6dB variation from 350 Hz to 2700 Hz
Audio distortion Less than 2% at rated power J3E mode
Input protection Better than 30V RMS from a 50 Ohm source
Transmitter Specifications
RF output power 100 watt PEP two-tone ± 1.5dB 125 watt PEP voice ± 1.5dB or 25 watt PEP two-tone ± 1.5dB 30 watt PEP voice ± 1.5dB or 8 watt PEP two-tone ± 1.5dB 10 watt PEP voice ± 1.5dB
Duty cycle 100% two-tone input signal with fan option
Protection Safe under all load conditions, thermal protection against excessive power transistor temperatures
Sideband suppression Better than -65dB below PEP
Harmonic suppression Better than -60dB below PEP
Carrier suppression Better than -55dB below PEP
Residual hum and noise Better than -58dB
Spurious emission Better than -60dB below PEP
Intermodulation products Better than -32dB below PEP (26dB below two-tone peak)
Audio frequency response Less than 6dB variation 350 Hz to 2700 Hz
Current consumption Voice average less than 9Amps typical Two-tone less than 12Amps typical
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