| 2026-05-27 11:38:43 |
martin.johansson@esharp.se |
update |
entry #57 |
mcp |
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| Field | Before | After |
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| resolution | | Closed as duplicate of E-008 (id 55), which is the canonical TA R1 DMM_GND-return decision and contains the richer treatment (per-J-connector jumpers, operator contract, jumper-state sensing, test-sequencing patterns, Phoenix-side completion). The diagnostic table in this entry is also present in E-007 (closed) and E-008. No new information would be lost by closing this. | | status | open | closed |
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| 2026-05-27 11:37:53 |
martin.johansson@esharp.se |
create |
entry #57 |
mcp |
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| Field | Before | After |
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| code | — | E-010 | | id | — | 57 | | kind | — | decision | | scope | — | next_revision | | severity | — | warning | | status | — | open | | title | — | TA R1: add dedicated DMM_GND return between FE AGND and Phoenix P4 |
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| 2026-05-27 11:34:32 |
martin.johansson@esharp.se |
create |
entry #56 |
mcp |
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| Field | Before | After |
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| code | — | E-009 | | id | — | 56 | | kind | — | decision | | scope | — | next_revision | | severity | — | warning | | status | — | open | | title | — | TA R1: provide 2.5 V + GND output connector for DSUB-9 audio loopback plug |
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| 2026-05-27 11:31:40 |
martin.johansson@esharp.se |
update |
entry #55 |
mcp |
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| Field | Before | After |
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| No field changes recorded |
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| 2026-05-27 11:29:31 |
martin.johansson@esharp.se |
create |
entry #55 |
mcp |
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| Field | Before | After |
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| code | — | E-008 | | id | — | 55 | | kind | — | decision | | scope | — | next_revision | | severity | — | warning | | status | — | open | | title | — | TA R1: dedicated DMM_GND return required on Phoenix terminal block |
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| 2026-05-27 11:29:21 |
martin.johansson@esharp.se |
update |
entry #54 |
mcp |
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| Field | Before | After |
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| resolution | | Root cause confirmed: TA R0 ground-reference offset, caused by J4–J9 GND pins being routed to the host MPIO ADC as signals (so they cannot carry return current). Ad-hoc ground wire from SDM3055 GND to FE AGND reduces the bias from ~10 mV to ~3 mV — sufficient evidence to close this question. PT-PWR.10 reframed as routing smoke test (window widened to ±0.4 %); precision VREF verification stays at PT-PWR.06 on N-Top. TA R1 design rule (dedicated DMM_GND return) filed as a separate decision entry on this project. | | status | open | closed |
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| 2026-05-27 11:03:16 |
martin.johansson@esharp.se |
create |
entry #54 |
mcp |
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| Field | Before | After |
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| code | — | E-007 | | id | — | 54 | | kind | — | question | | scope | — | action | | severity | — | warning | | status | — | open | | title | — | J5 VREF measurement via TA adds ~10 mV positive bias — root cause TBD |
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| 2026-05-27 11:02:51 |
martin.johansson@esharp.se |
create |
entry #53 |
mcp |
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| Field | Before | After |
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| code | — | E-006 | | id | — | 53 | | kind | — | notice | | scope | — | next_revision | | severity | — | warning | | status | — | open | | title | — | TA R0 schematic mfg P/N wrong on EGP10001847 — fix in next revision |
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| 2026-05-26 07:46:05 |
martin.johansson@esharp.se |
create |
notice #25 |
mcp |
— |
| 2026-05-26 07:45:56 |
martin.johansson@esharp.se |
create |
open_question #2 |
mcp |
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| Field | Before | After |
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| code | — | Q-TA-01 | | dueDate | — | 2026-06-15 | | id | — | 2 | | owner | — | martin.johansson@esharp.se | | question | — | **What is the function of R48 on the Sparrow Test Adapter (ESH10000654 R0)?**
R48 was missing on the as-assembled DUT-01 / S/N P0 board and was patched in on 2026-05-15 (see TA patch notice #3). Schematic shows R48 = **0 Ω jumper** in the relay-driver area near U1 (74HCS86 EGP10001847) and U2 (TBD62083AFNG,EL).
To answer:
1. Trace R48 in `Schematic_Sparrow_TA_R0.pdf` — identify the two nets it bridges.
2. Cross-check against the netlist (when QCV / IPC356 / `please-netlist-v1.json` is generated for project 14).
3. Determine whether R48 is:
- **Critical** — required for normal TA operation (e.g. enables a relay-driver output stage). If so, all future ESH10000654 R0 builds must include R48; flag the assembler.
- **Debug/test-point** — link used during bring-up only, can stay DNP without operational impact.
- **Calibration** — different value for different fixture instances (unlikely given 0 Ω).
Update this question once the role is confirmed and the next-rev BOM is updated accordingly. | | status | — | Open |
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| 2026-05-26 07:45:45 |
martin.johansson@esharp.se |
create |
notice #24 |
mcp |
— |
| 2026-05-26 07:45:33 |
martin.johansson@esharp.se |
create |
notice #23 |
mcp |
— |
| 2026-05-26 07:45:29 |
martin.johansson@esharp.se |
create |
notice #22 |
mcp |
— |
| 2026-05-26 07:45:09 |
martin.johansson@esharp.se |
create |
dut #3 |
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| Field | Before | After |
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| firmwareRev | — | | | hardwareRev | — | R0 | | id | — | 3 | | serialNumber | — | P0 |
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| 2026-05-25 13:40:34 |
martin.johansson@esharp.se |
create |
test_case #216 |
mcp |
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| Field | Before | After |
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| category | — | quality | | code | — | TC-TS-006 | | id | — | 216 | | nominal | — | | | requirementCode | — | REQ-TS-006 | | signal | — | | | status | — | open | | title | — | Limit Derivation Audit | | tolerancePct | — | |
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| 2026-05-25 13:40:34 |
martin.johansson@esharp.se |
create |
requirement #223 |
mcp |
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| Field | Before | After |
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| category | — | quality | | code | — | REQ-TS-006 | | id | — | 223 | | statement | — | Every test step in this test system shall have its pass/fail limits derived from the documented tolerance stack of all components in the measurement path (references, dividers, resistors, ADCs, drivers, wiring). | | status | — | draft | | title | — | Test Limit Derivation Documented |
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| 2026-05-25 09:18:44 |
martin.johansson@esharp.se |
create |
project #14 |
api |
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| Field | Before | After |
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| code | — | ESH10000654 | | description | — | | | id | — | 14 | | ipSensitive | — | False | | name | — | Sparrow Test Adapter PCBA | | revision | — | R0 |
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