The SKA Mid SPFRx receiver/digitizer qualification model testing
Bibliographic record
Abstract
The Single Pixel Feed Receiver (SPFRx) has been developed for the SKA1-Mid dishes by the National Research Council (NRC) Canada in cooperation with the University of Bordeaux, France. The SPFRx takes preamplified SPF Radio Frequency (RF) signals in two polarities and converts the RF into digital samples. The RF conditioning component of RXS applies bandpass filtering, spectrum leveling, and variable gain amplification to prepare for sampling by Analog to Digital Converter (ADC) devices. The ADC-produced RF samples are processed by a digital processor based on a System-on-Chip Field Programmable Gate Array (SoC FPGA). The FPGA firmware assembles RF samples into network packets and streams the data from each Dish over a dedicated 100 Gigabit Ethernet link to the SKA Central Signal Processing (CSP) facility. In this paper, we outline the design of SPFRx hardware, firmware, and software and present the test results for SPFRxB123 Qualification Model, a pre-production SPFRx for SKA MID bands 1, 2, and 3.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".