Category: Electronics

Introduction Last year I was successfully able to receive cubesats EIRSAT-1, Veronika and ENSO. A key element in their reception was a 433MHz BPF+LNA (Ref.1). Recently new cubesats have been launched, but working at a frequency closer to 400MHz. My existing LNA is broadband but the BPF cuts off above 400MHz so it can’t be… Continue reading NanoVNA for 400MHz/70cm BPF+LNA Testing

Introduction In previous posts, I looked at WSPR & FT8 as part of the WSJT-X protocol suite (Ref.1/6). In Ref.1, I reviewed the WSPR protocol and simulated it in Scicos. I received the signal using the RTL-SDR with HamItUp converter on 30m at 10.1387MHz. In Ref.3 I tested the PlutoSDR for possible application as a… Continue reading PlutoSDR for WSPR on 2m & 6m_a

Introduction Costas & Squaring Loops are key components in reception of Telecommunication Signals. They are used to synchronize a local generated carrier with an incoming received carrier. We can simulate and study their operation using Scicos (Ref.1). First we generate a BPSK waveform at R=100bit/sec to use with our two Demodulators (Ref.2). BPSK Waveform Generation… Continue reading Carrier Synchronization with Costas & Squaring Loops -Simulation