[TangerineSDR] Notes from PSWS / TangerineSDR call of 07-05-2020

[Dr. Nathaniel A. Frissell Ph.D.]

Hi everyone,

Here are the recordings from last night’s meeting: https://scranton.zoom.us/rec/share/wulNL7j5xlFLHZGQuH6DAaI9F5jbeaa8gCMZ_vAExU_zBW88MHUw3Xt3XaQGXg-E

73 de Nathaniel W2NAF

From: TangerineSDR <tangerinesdr-bounces at lists.tapr.org> On Behalf Of Tom McDermott via TangerineSDR
Sent: Monday, July 6, 2020 10:18 PM
To: TAPR TangerineSDR Modular Software Defined Radio <tangerinesdr at lists.tapr.org>
Cc: Tom McDermott <tom.n5eg at gmail.com>
Subject: [TangerineSDR] Notes from PSWS / TangerineSDR call of 07-05-2020


Notes from PSWS / TangerineSDR call of 07-05-2020

1. Discussion  on VITA-49 SDR protocol standard. The protocol format is open. Questions about VITA49 include:
   * How to handle and align multiple different streams.
   * How to time mark the data to be compliant with what Digital RF needs.
(Digital RF needs the samples to be time-aligned to exactly a 1.000000 second boundary and uses ??? to identify gaps. It uses this to group the data into 1 second long files).

2. Need to have a 192KHz (or related) clock for Jonathan's VLF/LF receiver (based on audio codec). This could come from the high-performance synthesizer on the clock module. It should not come from the FPGA (not clean enough for a 24-bit ADC). The general scheme is to send the high quality clock to the receiver, which then sends data and the looped-around clock back to the FPGA (source synchronous).

3. Dave Witten has updated the magnetometer code to chunk the data into one-day sets. He has created scripts for Hyomin to operate the sensor and collect data on a Raspberry PI.

4. Scotty received the library files from Intel for the -6 FPGA variant he is planning to use.

5. Scotty is planning to start a build of 50 magnetometer boards. It will take about 3 weeks to complete once started.

-- Tom, N5EG




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