Difference between revisions of "QRP Labs High Performance SDR Receiver"
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*** [https://www.ti.com/lit/ds/symlink/lm4562.pdf Low noise LM4562 op-amps] are used in instrumentation amplifier configuration to provide excellent common mode noise rejection | *** [https://www.ti.com/lit/ds/symlink/lm4562.pdf Low noise LM4562 op-amps] are used in instrumentation amplifier configuration to provide excellent common mode noise rejection | ||
*** The audio output of the module is isolated using two 600:600-ohm transformers to reduce or eliminate the ground loop problems which can easily occur in SDR systems | *** The audio output of the module is isolated using two 600:600-ohm transformers to reduce or eliminate the ground loop problems which can easily occur in SDR systems | ||
| − | *** The module is designed to directly drive a stereo input sound-card | + | *** The module is designed to directly drive a stereo input sound-card or with a polyphase filter card |
*** Receiver board has a socket for the standard QRP Labs Band Pass Filter kit which can be routed to an external bandpass filter switch card | *** Receiver board has a socket for the standard QRP Labs Band Pass Filter kit which can be routed to an external bandpass filter switch card | ||
** [[RF Band Pass Filters|QRP Labs Band Pass Filter]] | ** [[RF Band Pass Filters|QRP Labs Band Pass Filter]] | ||
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* Band Pass Filter and Polyphase filter mount on Receiver Module | * Band Pass Filter and Polyphase filter mount on Receiver Module | ||
* The receiver requires a local oscillator (LO) input at 4x the receive frequency | * The receiver requires a local oscillator (LO) input at 4x the receive frequency | ||
| + | ** Using | ||
* The receiver module is sized 80 x 37mm | * The receiver module is sized 80 x 37mm | ||
Revision as of 15:28, 20 November 2021
Features
- Three modules
- QRP Labs High Performance Receiver Module
- Direct Conversion Receiver
- Uses a Quadrature Sampling Detector (QSD), also known as a Tayloe Detector
- FST3253 Mixer is arranged as a double-balanced mixer for maximum performance
- Circuit to mute receiver during transmit
- Low noise LM4562 op-amps are used in instrumentation amplifier configuration to provide excellent common mode noise rejection
- The audio output of the module is isolated using two 600:600-ohm transformers to reduce or eliminate the ground loop problems which can easily occur in SDR systems
- The module is designed to directly drive a stereo input sound-card or with a polyphase filter card
- Receiver board has a socket for the standard QRP Labs Band Pass Filter kit which can be routed to an external bandpass filter switch card
- QRP Labs Band Pass Filter
- Can be used with a Switched Bandpass filter board for multiband operation
- QRP Labs Polyphase filter
- Polyphase network plug-in module kit which cancels the unwanted sideband and produces a single sideband (SSB) output
- QRP Labs High Performance Receiver Module
- Band Pass Filter and Polyphase filter mount on Receiver Module
- The receiver requires a local oscillator (LO) input at 4x the receive frequency
- Using
- The receiver module is sized 80 x 37mm
Radio Links
- High performance SDR receiver module
- Polyphase network module - QRP Labs
- RF_Band_Pass_Filters
- Clocks Generator
Silkscreen
