External Links

• QS1R Yahoo Support Forum
• SDR Blog
• Linear Technology
• Altera

Directory

• QS1R SVN
• SDRMAX Download

SRL QS1R Features

• LTC2208 16 bit, 130 MSPS analog to digital converter (ADC)

• Altera Cyclone III EP3C25 FPGA

• Cypress CY7C68013A USB 2.0 Microcontroller

• I2C expansion bus

• SPI expansion bus

• RF expansion "VERB Bus"
  

• Open source firmware for "FX2" microcontroller

• Open source verilog for Cyclone III DDC

• Open source software - SDRMAX-win, SDRMAX-linux
• Firmware, verilog, and software user updatable via web download

• Secure Digital (SD) card connector for configuration memory (optional)

• TI PCM1771 24 bit DAC for optional audio output

• 125 MHz LVDS output
• Low pass filtered (55 MHz) BNC input
• Direct input (15 kHz - 300 MHz) via SMA connector
• Direct input (15 kHz - 300 MHz) via RF expansion bus
• External encode clock (ADC clock) input via SMA connector
• Ultra low noise clock included as standard
• 160 x 100 mm (6.299" x 3.940") L x W
• Fused and reverse polarity protected  2.5 mm DC power input
• Power and ADC clipping LED indicators
• Four user programmable "debug" LEDs

QS1R Possible Uses

• Spectrum Analysis
• General Purpose ADC board w/ up to 4 MHz BW
• Software Defined Receiver
• Short Wave Listening (SWL)
• Amateur Radio HF Receiver 
• Amateur Radio IF Receiver
• Panoramic Adapter for Communication Receivers (Any IF)
• FPGA based SDR Development Platform
• Ultrasound Receiver
• Radio Astronomy
• VLF Experimentation
• SDR Education
• Interferometer for passive RF signal  location
• SIGINT
• COMINT
• TDOA

QS1R Specifications (Standard Receiver*)

- Frequency Range (BNC LPF Input): 15 kHz to 62 MHz
- Frequency Range (SMA direct input): 15 kHz to 300 MHz
- Input Impedance: 50 ohms
- Clipping RF Level: +9 dBm
- Maximum Display Bandwidth: 4 MHz
- ADC Sampling Clock: 125 MHz (1 - 130 MHz with external encode input)
- I/Q Image Rejection: >110 dB
- MDS (500 Hz): -111 dBm @ 14.1 MHz
- BDR: 125 dB
- Voltage: 5 - 6 VDC, 2A fused, reverse polarity protected
- Current Draw: 500 mA (typ.)
- Connectors: BNC (RF IN LPF), SMA (RF IN, EXT ENCODE CLOCK), USB Type "B", 2.1 mm DC Power
- LEDS: Power, Clipping, Debug (internal)
- Dimensions: 160 x 100 mm (3.299" x 3.940") (board size)

*custom modifications are available, please contact factory

QS1R Planned Add-on Boards

• Bandpass and RF Amp-Attenuator board -RFFE1
• QS1T Direct Up-conversion (DUC) Transmitter 
• VHF/UHF/Microwave Expansion boards
• Vector Network Analyzer (VNA) Add-on
• Digital Oscilloscope and Spectrum Analyzer Add-on
• Universal Control I/O Board
• 60 - 300 MHz Undersampling Adapter

SDRMAX Software