Portable government communications / Reference hardware
AN/PRC-163 mass of 1.25 kg and volume of 655.48 cm³ provides the published hardware reference.
Reference hardware
Evidence: Manufacturer specifications and worked calculation examples.
CUMULATIVE APPLICATION BUDGET / 17 OCTOBER 2026
1,453,784,064→1,163,480,256 bytes for the reviewed design boundary. Writes fall 10.71%, reads 17.65%, timing-record checksum steps 60% on separate axes.
Conditional design arithmetic; original full-service qualification remains open.
Related model results: D027: 51.49% longer completion; 0.4356% more energy at its worst tested condition; D099: 3.95% longer completion; 0.5095% more energy at its worst tested condition. No winner saved energy across the required robustness cases.
Related model jobs: D027, D099. Integration into a product remains open.
Complete bundles, comparisons and lossesWHAT THE NUMBERS MEAN
The published radio reference weighs 1.25 kg and occupies 655.48 cm³, including its battery. These are reference size and mass. The earlier smaller-recording test lost required data, so its proposed saving was rejected.
A lighter portable receiver or recorder, longer battery life, or lower power drawn from a vehicle, with the same required signal functions and evidence.
THE APPLICATION
Communications manufacturers and government engineering reviewers
The aim is a smaller or lighter receiver or recorder, longer battery operation, or less power drawn from a vehicle, with the same signal performance and complete required evidence.
Receiver health and evidence · Passive signal recording · Amplifier modeling
The comparison covers a defined evidence-retention or receiver-review task, with quality and interoperability held fixed.
REFERENCES & CHECKED RESULTS
| Measure | Reference or conventional method | FI result or stated assumption | What it means |
|---|---|---|---|
| Published portable reference | L3Harris AN/PRC-163: 1.25 kg and 655.48 cm³ including battery | No FI reduction in mass or volume has been measured | Published hardware size and mass |
| Power boundary | The operating point at the battery input is unavailable | Whole-radio power has no measured reference point | The whole-radio energy comparison remains open |
| Recording retention | Keep all required evidence | The tested smaller recording lost required data | The change was rejected |
Executed software comparisons and calculated bounds · 12 October 2026
FI compared ways to store calculation records while keeping the same required output, checks and record behavior. The smaller formats saved memory, but timing depended on the comparison. A separate signal-recording calculation exceeded its frame budget.
A packed, ordered snapshot used less traced Python memory in all 16 matched groups. The detailed record was faster in six groups; two comparisons were uncertain. Against a second read-only format, eight timing comparisons were uncertain.
The snapshot preserves the complete ordered record for reading. It gives up persistent edits, object identity, live changes, custom traces and the full list interface.
One specified validation job needs at least 16,896 recording units per frame to retain the unchanged record. Its budget is 8,192 units.
These are recording-work units from a fixed, uncalibrated model, rather than processor clock cycles.
Named Wi-Fi transmit-path calculation · 12 October 2026
The Skyworks SKY85747-11 datasheet gives two Wi-Fi operating points with different output levels and error limits. At the lower output, a calculation leaves room for added processing error under the signal-reference assumptions below.
The datasheet lists +12 dBm output with −47 dB error and +16 dBm output with −43 dB error for 802.11ax MCS11 HE80 at 5 V and 25 °C. A job requiring +16 dBm rejects the +12 dBm operating point because it delivers less RF output. The lower RF output is a service loss; supply-power saving remains unquantified.
With the same signal reference, timing, corrections and normalization for all errors, the −47 dB source limit allows at most 0.0026126 added normalized RMS error while retaining a −43 dB total limit. RMS means root mean square, a measure of signal size. The allowance is about −51.6585 dB. It uses the triangle bound to cover the worst alignment between the source and added errors.
At a source error of −43 dB, no guaranteed added-error allowance remains. Adding squared errors would permit a larger allowance only if their cross-term were zero in the same norm. Statistical independence alone does not prove that condition for a finite recording. The datasheet leaves the exact error-measurement setup unresolved, so the common-reference assumption remains necessary.
At +16 dBm average output on ANT, the datasheet’s coupling limits imply −3 to +0.5 dBm average at CPLR, the feedback port, if the output and coupling limits share a power reference, impedance and bandwidth. Receiver headroom remains unresolved: waveform peaks, bandwidth, path loss, gain and linear input limits have not been matched.
Conventional designs can use the same integrated feedback coupler. Current draw has not been matched at these exact output and quality conditions. Feedback reception, conversion, processing and thermal costs remain unquantified.
SOURCES / REVIEWED 6 OCTOBER 2026
Published size and mass, August 2024. This is a hardware reference; FI implementation and operation remain unmeasured.
The failed retention result and current receiver-development status.
Saved sensing-energy ranges, independently checked thermal calculations and recorded software comparisons. The device calculations show energy shares, heat paths and component budgets.
