The DF-A0257 is a tri band, compact Adcock DF antenna intended for manpack direction-finding on the move from 20 MHz to 6000 MHz. The DF-A0257 can also be used with the DF-A0245 quad pod antenna for better low-end performance. The antenna presents patterns suitable for the WatsonWatt estimation method, as well as 3-channel correlative DF (CDF). The antenna offers an omni-channel output that can also be used for monitoring. The DF-A0257 has a low noise amplifier on each channel with passive bypass capability, an integrated noise source or optional external signal can be used for downstream RF chain calibration and also includes a navigation and GPS.
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Frequency range | 20 - 6000 MHz |
Number of channels | 3 |
DF method | Watson-Watt or 3-channel CDF |
RMS accuracy | See graph below |
Polarisation | Vertical |
Omni-output | Yes |
Nominal input impedance | 50 O |
RF Amplification Gain | 20 ± 2 dB |
Switching time | < 100 µs using serial commands < 5 µs when using dedicated lines |
Navigation | Integrated compass Heading accuracy 2° RMS |
GPS Antenna | Active (L1) |
Onboard Storage | Model no. |
Programming interface | None |
RF calibration | RF chain calibration using Integrated noise source or external applied signal |
Power supply | 6 - 18 V DC |