Down-converter for DRM and DSP signals reception. To be used with
popular HF receivers. The HF receiver’s IF out is connected with the
down-converter and the output of down-converter is connected with the
P.C. sound card. Thanks to a freeware software voice, texts and data
are made available on the P.C. The board is compatible with FDM77 all
mode LW,MW,HF Software Defined Radio Receiver.
Main features and technical
specifications:
- RF Aluminium box
meas. 200 x 65 x 190mm. Weight: 800 g
- Power supply: 11 -
15V DC
- RF in: BNC 50Ω
- Galvanically
isolated 12kHz IF balanced output (3.5mm audio connector; 600Ω
impedance)
- Two
switchable input filters with 15 kHz BW plus direct path
- 455kHz
switchable bandwidth, 10.7MHz, 21.4MHz, 60.455MHz or 70MHz
- Two
crystal L.O. Switchable (20.945MHz, and 10.245MHz)
- One
fixed 467kHz crystal L.O.
- Adjustable
12kHz output level (HI-LO)
- Spur-free
dynamic range 70 - 80dB
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