The SDR system in the new DX-SR9 consists of I/O signal output and a mixer circuit. It requires a high quality sound device (internal or USB interface) and PC specifications as follows:

Key Features/Specifications:

• Memory channels - 600 channels simplex
• Antenna impedance - 50 ohms unbalanced
• Frequency stability - +/- 1ppm
• Power requirement - 13.8v DC +/-15% (11.7-15.8v)
• Ground method - negative ground
• Current drain - Receive 1.0A (max) / Transmit 20A
• Operating temperature - -10C to 60C
• Dimensions - 240 x 94 x 255mm WHD (projections not included)
• Weight - approx 4.1kg
• Transmitter - power output SSB, CW. FM 100/10/1w (QRP) / AM 40/4/0.4w
• Modulation system - SSB(balanced modulation) AM(low power modulation)
• FM (reactance modulation)
• Spurious emissions - Less than -50db (less than -45db in 30m band)
• Carrier suppression - more than 40db
• Unwanted sideband - more than 50db (1kHz)
• Maximum FM deviation - +/- 2.5kHz
• Receiver type - double conversion superheterodyne
• Sensitivity - SSB (0.15 to 1.8MHz) - 0dBu (1uV)
• Sensitivity - CW (1.8 to 30MHz) - -12dBu(0.25uV)
• Sensitivity - AM (0.15-1.8MHz) +20dBu(10uV) / (1.8 to30MHz) +6dBu(0.5uV)
• Intermediate frequency - 1st 71.75MHz / 2nd 455kHz
• Selectivity - CW, SSB (narrow) 1kHz/-6dB 3kHz/-60dB
• Selectivity - SSB,AM (narrow) 2.4kHz/-6dB 4.5kHz/-60dB
• Selectivity - AM/FM 9kHz/-6dB 20kHz/-50dB
• Spurious and image rejection ratio - more than 70dB
• Audio output power - more than 2.0watts (8ohms, 10%THD)
• RIT variable range - +/- 1.2kHz