Expert Electronics SunSDR2 DX - Transmitter Specifications

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SunSDR2 DX User Manual
© 2020 Expert Electronics
TECHNICAL CHARACTERISTICS
HF WideRX filter: LPF (low pass filter) 0-65 MHz (Chebyshev I - 7 Order)
Narrow band pass filter for VHF 2M: 144-148 MHz (SAW Filter) - preferred for normal operation
VHF WideRX: 95-155 MHz (Butterworth - 5 Order)
Also SunSDR2 DX has filters which are a part of the RX path and cannot be switched off:
HPF for VHF (100 MHz cut frequency) to eliminate strong out-of-band stations coming from
HF.
LPF for HF (70 MHz cut frequency) to eliminate strong out-of-band stations coming from VHF.
On VHF there is 1 dB attenuation in comparison to HF, which does not influence sensitivity
because there an +27 dB VHF LNA.
6.2 Transmitter
Characteristic
Value
TX frequency range, M
All amateur bands (160-6; 2 M)
RF DAC, bit @ MHz
14 @ 640
Built-in audio DAC resolution, bit
24
Maximum output power on HF, W
100
Maximum output power on 6M, W
50 (up to 60)
Maximum output power on VHF, W
7 (up to 8)
TX IMD3 on HF / VHF, dB
35 / 30*
TX filters
Output LPF on the DUC chip:
202 MHz (Eleptic - 7 order)
8 x LPF:
160M: (Eleptic - 5 order)
80M: (Eleptic - 5 order)
60-40M: (Eleptic - 5 order)
30-20M: (Eleptic - 5 order)
17-15M: (Eleptic - 5 order)
12-10M: (Eleptic - 5 order)
6M: (Eleptic - 5 order)
2M: (Eleptic - 5 order)
* Since the 3rd batch manufactured in July 2020.