AR-75
The AR-75 is the second generation 75W portable, fully automatic band-switching RF booster amplifier for multi-band VHF / UHF Tactical Radio equipment employing legacy, proprietary and emerging waveforms. The redesigned unit incorporates a slimmer, lighter, and lower-profile design than the predecessor. The amplifier covers the frequency band of 30-512 MHz using six high-speed auto switching filters to assure harmonic suppression and is SINCGARS, HAVEQUICK, HPW, DAMA, IW, WNW, SRW and ANW2 compatible. The amplifier includes power supply Voltage Spike Suppression, a DC/DC convertor for wide DC input range, RF sensing, T/R switching, Automatic Level Control (ALC), six automatically switched harmonic filter bands (DAMA capable), and protection against antenna mismatch and over-temperature. Protection against accidental polarity reversal is provided. The amplifier comprises a rugged 2-piece aluminum case.
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| Frequency Range | 30-512 MHz |
|---|---|
| Power Output | 75 Watts CW nominal; 75 W PEP with 70% AM modulation; < 10% distortion typical |
| Input Power Range CW: 1-20 W | 5-8 Watts CW typical for nominal 75 Watts Output; Input Protection for up to 20 W CW |
| Input Power Range AM | 2 Watt average (5-7 W PEP) for 70 W PEP output at 70% modulation |
| RF Keying Sensitivity | 1 Watt typical |
| T/R & Filter Switchover Time | SINCGARS, HAVEQUICK, HPW, DAMA, IW, WNW, SRW, and ANW2 capable |
| Insertion Loss Bypass Mode | 1.0 dB typical |
| Insertion Loss Active RX | 1.5 dB nominal |
| Modulation | AM, FM, or PM, and Tactical communications waveforms |
| Duty Cycle | Tactical operations |
| Input/Output Impedance | 50 Ω nominal |
| Input VSWR | 1.5:1 nominal |
| Harmonics | Better than – 60 dBc typical. FULL high speed filter switching avoids interference in SINCGARS and HAVEQUICK – No filter gaps |
| Spurious Outputs | Better than – 70 dBc |
| Rx LNA Gain | 12 dB typical |
| Rx LNA Noise Figure | 2 dB typical |
| Rx Co-Site Filter | Band pass frequency 239-273 MHz, Out of band rejection 45 dB typical |
| Power Requirement | 18-35.5 VDC filtered and transient protected for 24 volt vehicle systems batteries MIL-STD 1275 and 461 compliant DC-DC internal power supply |
| Current | < 9.5 Amps @ 24 V typical |