diff --git a/bridges/s3-bridge/s3_bridge.py b/bridges/s3-bridge/s3_bridge.py
index 835333c..733eb21 100644
--- a/bridges/s3-bridge/s3_bridge.py
+++ b/bridges/s3-bridge/s3_bridge.py
@@ -1,29 +1,23 @@
 #!/usr/bin/env python3
 """
-s3_bridge.py — S3 <-> Blastware serial bridge with frame-aware session logging
-Version: v0.4.0
+s3_bridge.py — S3 <-> Blastware serial bridge with raw binary capture + DLE-aware text framing
+Version: v0.5.0
 
-Key features:
-- Low CPU: avoids per-byte console printing
-- Forwards bytes immediately (true bridge)
-- Frame-aware logging: buffers per direction until ETX (0x03), then logs full frame on one line
-- Also logs plain ASCII bursts (e.g., "Operating System") cleanly
-- Dual log output: hex text log (.log) AND raw binary log (.bin) written simultaneously
-- Interactive annotation: type 'm' + Enter to stamp a [MARK] into both logs mid-capture
-- Binary sentinel markers: out-of-band FF FF FF FF <len> <label> in .bin for programmatic correlation
-- Auto-marks on session start and end
+What’s new vs v0.4.0:
+- .bin is now a TRUE raw capture stream with direction + timestamps (record container format).
+- .log remains human-friendly and frame-oriented, but frame detection is now DLE-aware:
+    - frame start = 0x10 0x02 (DLE STX)
+    - frame end   = 0x10 0x03 (DLE ETX)
+  (No longer splits on bare 0x03.)
+- Marks/Info are stored as proper record types in .bin (no unsafe sentinel bytes).
 
-Usage examples:
-  python s3_bridge.py
-  python s3_bridge.py --bw COM5 --s3 COM4 --baud 38400
-  python s3_bridge.py --quiet
-
-Annotation:
-  While running, type 'm' and press Enter. You will be prompted for a label.
-  The mark is written to the .log as:
-      [HH:MM:SS.mmm] >>> MARK: your label here
-  And to the .bin as an out-of-band sentinel (never valid frame data):
-      FF FF FF FF <1-byte length> <label bytes>
+BIN record format (little-endian):
+  [type:1][ts_us:8][len:4][payload:len]
+Types:
+  0x01 BW->S3 bytes
+  0x02 S3->BW bytes
+  0x03 MARK (utf-8)
+  0x04 INFO (utf-8)
 """
 
 from __future__ import annotations
@@ -39,38 +33,56 @@ from typing import Optional
 
 import serial
 
+VERSION = "v0.5.0"
 
-VERSION = "v0.4.0"
+DLE = 0x10
+STX = 0x02
+ETX = 0x03
+ACK = 0x41
 
-# Sentinel prefix for binary markers. Four 0xFF bytes can never appear in
-# valid Instantel DLE-framed data (0xFF is not a legal protocol byte in any
-# framing position), so this sequence is unambiguously out-of-band.
-BIN_MARK_SENTINEL = b"\xFF\xFF\xFF\xFF"
+REC_BW = 0x01
+REC_S3 = 0x02
+REC_MARK = 0x03
+REC_INFO = 0x04
 
 
 def now_ts() -> str:
-    # Local time with milliseconds, like [13:37:06.239]
     t = _dt.datetime.now()
     return t.strftime("%H:%M:%S.") + f"{int(t.microsecond/1000):03d}"
 
 
+def now_us() -> int:
+    # Wall-clock microseconds (fine for correlation). If you want monotonic, we can switch.
+    return int(time.time() * 1_000_000)
+
+
 def bytes_to_hex(b: bytes) -> str:
     return " ".join(f"{x:02X}" for x in b)
 
 
 def looks_like_text(b: bytes) -> bool:
-    # Heuristic: mostly printable ASCII plus spaces
     if not b:
         return False
     printable = 0
     for x in b:
-        if x in (9, 10, 13):  # \t \n \r
+        if x in (9, 10, 13):
             printable += 1
         elif 32 <= x <= 126:
             printable += 1
     return (printable / len(b)) >= 0.90
 
 
+def pack_u32_le(n: int) -> bytes:
+    return bytes((n & 0xFF, (n >> 8) & 0xFF, (n >> 16) & 0xFF, (n >> 24) & 0xFF))
+
+
+def pack_u64_le(n: int) -> bytes:
+    out = []
+    for i in range(8):
+        out.append((n >> (8 * i)) & 0xFF)
+    return bytes(out)
+
+
 class SessionLogger:
     def __init__(self, path: str, bin_path: str):
         self.path = path
@@ -83,24 +95,24 @@ class SessionLogger:
         with self._lock:
             self._fh.write(line + "\n")
 
-    def log_raw(self, data: bytes) -> None:
-        """Write raw bytes directly to the binary log."""
+    def bin_write_record(self, rec_type: int, payload: bytes, ts_us: Optional[int] = None) -> None:
+        if ts_us is None:
+            ts_us = now_us()
+        header = bytes([rec_type]) + pack_u64_le(ts_us) + pack_u32_le(len(payload))
         with self._lock:
-            self._bin_fh.write(data)
+            self._bin_fh.write(header)
+            if payload:
+                self._bin_fh.write(payload)
 
     def log_mark(self, label: str) -> None:
-        """
-        Write an annotation mark to both logs simultaneously.
-
-        .log  — visually distinct line: [TS] >>> MARK: label
-        .bin  — out-of-band sentinel: FF FF FF FF <len> <label utf-8, max 255 bytes>
-        """
         ts = now_ts()
-        label_bytes = label.encode("utf-8", errors="replace")[:255]
-        sentinel = BIN_MARK_SENTINEL + bytes([len(label_bytes)]) + label_bytes
-        with self._lock:
-            self._fh.write(f"[{ts}] >>> MARK: {label}\n")
-            self._bin_fh.write(sentinel)
+        self.log_line(f"[{ts}] >>> MARK: {label}")
+        self.bin_write_record(REC_MARK, label.encode("utf-8", errors="replace"))
+
+    def log_info(self, msg: str) -> None:
+        ts = now_ts()
+        self.log_line(f"[{ts}] [INFO] {msg}")
+        self.bin_write_record(REC_INFO, msg.encode("utf-8", errors="replace"))
 
     def close(self) -> None:
         with self._lock:
@@ -112,51 +124,87 @@ class SessionLogger:
                 self._bin_fh.close()
 
 
-class FrameAssembler:
+class DLEFrameSniffer:
     """
-    Maintains a rolling buffer of bytes for one direction and emits complete frames.
-    We treat ETX=0x03 as an end-of-frame marker.
+    DLE-aware sniffer for logging only.
+    Extracts:
+      - ACK bytes (0x41) as single-byte events
+      - DLE-framed blocks starting at 10 02 and ending at 10 03
+      - Occasional ASCII bursts (e.g. "Operating System") outside framing
+    It does NOT modify bytes; it just segments them for the .log.
     """
     def __init__(self):
         self.buf = bytearray()
 
-    def push(self, chunk: bytes) -> list[bytes]:
+    def push(self, chunk: bytes) -> list[tuple[str, bytes]]:
         if chunk:
             self.buf.extend(chunk)
 
-        frames: list[bytes] = []
+        events: list[tuple[str, bytes]] = []
+
+        # Opportunistically peel off leading ACK(s) when idle-ish.
+        # We do this only when an ACK is not inside a frame (frames start with DLE).
+        while self.buf and self.buf[0] == ACK:
+            events.append(("ACK", bytes([ACK])))
+            del self.buf[0]
+
+        # Try to parse frames: find DLE STX then scan for DLE ETX
         while True:
-            try:
-                etx_i = self.buf.index(0x03)
-            except ValueError:
+            # Find start of frame
+            start = self._find_dle_stx(self.buf)
+            if start is None:
+                # No frame start. Maybe text?
+                txt = bytes(self.buf)
+                if looks_like_text(txt):
+                    events.append(("TEXT", txt))
+                    self.buf.clear()
                 break
 
-            # include ETX byte
-            frame = bytes(self.buf[: etx_i + 1])
-            del self.buf[: etx_i + 1]
+            # Emit any leading text before the frame
+            if start > 0:
+                leading = bytes(self.buf[:start])
+                if looks_like_text(leading):
+                    events.append(("TEXT", leading))
+                else:
+                    # Unknown junk; still preserve in log as RAW so you can see it
+                    events.append(("RAW", leading))
+                del self.buf[:start]
 
-            # ignore empty noise
-            if frame:
-                frames.append(frame)
+            # Now buf starts with DLE STX
+            end = self._find_dle_etx(self.buf)
+            if end is None:
+                break  # need more bytes
 
-        return frames
+            frame = bytes(self.buf[:end])
+            del self.buf[:end]
 
-    def drain_as_text_if_any(self) -> Optional[bytes]:
-        """
-        If buffer contains non-framed data (no ETX) and looks like text, emit it.
-        Useful for things like "Operating System" that come as raw ASCII.
-        """
-        if not self.buf:
-            return None
-        b = bytes(self.buf)
-        if looks_like_text(b):
-            self.buf.clear()
-            return b
+            events.append(("FRAME", frame))
+
+            # peel off any ACKs that may immediately follow
+            while self.buf and self.buf[0] == ACK:
+                events.append(("ACK", bytes([ACK])))
+                del self.buf[0]
+
+        return events
+
+    @staticmethod
+    def _find_dle_stx(b: bytearray) -> Optional[int]:
+        for i in range(len(b) - 1):
+            if b[i] == DLE and b[i + 1] == STX:
+                return i
+        return None
+
+    @staticmethod
+    def _find_dle_etx(b: bytearray) -> Optional[int]:
+        # Find first occurrence of DLE ETX after the initial DLE STX.
+        # Return index *after* ETX (slice end).
+        for i in range(2, len(b) - 1):
+            if b[i] == DLE and b[i + 1] == ETX:
+                return i + 2
         return None
 
 
 def open_serial(port: str, baud: int) -> serial.Serial:
-    # timeout keeps read() from blocking forever, enabling clean Ctrl+C shutdown
     return serial.Serial(
         port=port,
         baudrate=baud,
@@ -170,6 +218,7 @@ def open_serial(port: str, baud: int) -> serial.Serial:
 
 def forward_loop(
     name: str,
+    rec_type: int,
     src: serial.Serial,
     dst: serial.Serial,
     logger: SessionLogger,
@@ -177,22 +226,24 @@ def forward_loop(
     quiet: bool,
     status_every_s: float,
 ) -> None:
-    assembler = FrameAssembler()
+    sniffer = DLEFrameSniffer()
     last_status = time.monotonic()
 
     while not stop.is_set():
         try:
             n = src.in_waiting
-            if n:
-                chunk = src.read(n if n < 4096 else 4096)
-            else:
-                chunk = src.read(1)  # will return b"" after timeout
+            chunk = src.read(n if n and n < 4096 else (4096 if n else 1))
         except serial.SerialException as e:
             logger.log_line(f"[{now_ts()}] [ERROR] {name} serial exception: {e!r}")
             break
 
         if chunk:
-            # forward immediately
+            ts = now_us()
+
+            # 1) RAW BIN CAPTURE (absolute truth)
+            logger.bin_write_record(rec_type, chunk, ts_us=ts)
+
+            # 2) Forward immediately (bridge behavior)
             try:
                 dst.write(chunk)
             except serial.SerialTimeoutException:
@@ -201,55 +252,42 @@ def forward_loop(
                 logger.log_line(f"[{now_ts()}] [ERROR] {name} dst write exception: {e!r}")
                 break
 
-            # frame-aware logging
-            frames = assembler.push(chunk)
-            for frame in frames:
-                # Some devices send leading STX separately; we still log as-is.
-                logger.log_line(f"[{now_ts()}] [{name}] {bytes_to_hex(frame)}")
-                logger.log_raw(frame)
+            # 3) Human-friendly .log segmentation (DLE-aware)
+            for kind, payload in sniffer.push(chunk):
+                if kind == "ACK":
+                    logger.log_line(f"[{now_ts()}] [{name}] [ACK] 41")
+                elif kind == "FRAME":
+                    logger.log_line(f"[{now_ts()}] [{name}] {bytes_to_hex(payload)}")
+                elif kind == "TEXT":
+                    try:
+                        s = payload.decode("ascii", errors="replace").strip("\r\n")
+                    except Exception:
+                        s = repr(payload)
+                    logger.log_line(f"[{now_ts()}] [{name}] [TEXT] {s}")
+                else:  # RAW
+                    logger.log_line(f"[{now_ts()}] [{name}] [RAW] {bytes_to_hex(payload)}")
 
-            # If we have non-ETX data that looks like text, flush it as TEXT
-            text = assembler.drain_as_text_if_any()
-            if text is not None:
-                try:
-                    s = text.decode("ascii", errors="replace").strip("\r\n")
-                except Exception:
-                    s = repr(text)
-                logger.log_line(f"[{now_ts()}] [{name}] [TEXT] {s}")
-                logger.log_raw(text)
-
-        # minimal console heartbeat (cheap)
         if not quiet and status_every_s > 0:
             now = time.monotonic()
             if (now - last_status) >= status_every_s:
                 print(f"[{now_ts()}] {name} alive")
                 last_status = now
 
-        # tiny sleep only when idle to avoid spin
         if not chunk:
             time.sleep(0.002)
 
 
 def annotation_loop(logger: SessionLogger, stop: threading.Event) -> None:
-    """
-    Runs on the main thread (or a dedicated thread) reading stdin.
-    Type 'm' + Enter to trigger an annotation prompt.
-    Any other non-empty input is ignored with a hint.
-    Bare Enter (empty line) is silently ignored to prevent accidental marks.
-    """
     print("[MARK] Type 'm' + Enter to annotate the capture. Ctrl+C to stop.")
     while not stop.is_set():
         try:
             line = input()
-        except EOFError:
-            # stdin closed (e.g. piped input exhausted)
-            break
-        except KeyboardInterrupt:
+        except (EOFError, KeyboardInterrupt):
             break
 
         line = line.strip()
         if not line:
-            continue  # bare Enter — ignore silently
+            continue
 
         if line.lower() == "m":
             try:
@@ -292,11 +330,12 @@ def main() -> int:
     log_path = os.path.join(args.logdir, f"s3_session_{ts}.log")
     bin_path = os.path.join(args.logdir, f"s3_session_{ts}.bin")
     logger = SessionLogger(log_path, bin_path)
+
     print(f"[LOG] Writing hex log to  {log_path}")
     print(f"[LOG] Writing binary log to {bin_path}")
 
-    logger.log_line(f"[{now_ts()}] [INFO] s3_bridge {VERSION} start")
-    logger.log_line(f"[{now_ts()}] [INFO] BW={args.bw} S3={args.s3} baud={args.baud}")
+    logger.log_info(f"s3_bridge {VERSION} start")
+    logger.log_info(f"BW={args.bw} S3={args.s3} baud={args.baud}")
     logger.log_mark(f"SESSION START — BW={args.bw} S3={args.s3} baud={args.baud}")
 
     stop = threading.Event()
@@ -309,16 +348,15 @@ def main() -> int:
     t1 = threading.Thread(
         target=forward_loop,
         name="BW_to_S3",
-        args=("BW->S3", bw, s3, logger, stop, args.quiet, args.status_every),
+        args=("BW->S3", REC_BW, bw, s3, logger, stop, args.quiet, args.status_every),
         daemon=True,
     )
     t2 = threading.Thread(
         target=forward_loop,
         name="S3_to_BW",
-        args=("S3->BW", s3, bw, logger, stop, args.quiet, args.status_every),
+        args=("S3->BW", REC_S3, s3, bw, logger, stop, args.quiet, args.status_every),
         daemon=True,
     )
-    # Annotation loop runs in its own daemon thread so it doesn't block shutdown
     t_ann = threading.Thread(
         target=annotation_loop,
         name="Annotator",
@@ -335,12 +373,11 @@ def main() -> int:
             time.sleep(0.05)
     finally:
         print("\n[INFO] Ctrl+C detected, shutting down...")
-        logger.log_line(f"[{now_ts()}] [INFO] shutdown requested")
+        logger.log_info("shutdown requested")
 
         stop.set()
         t1.join(timeout=1.0)
         t2.join(timeout=1.0)
-        # t_ann is daemon — don't join, it may be blocked on input()
 
         try:
             bw.close()
@@ -352,12 +389,11 @@ def main() -> int:
             pass
 
         logger.log_mark("SESSION END")
-        logger.log_line(f"[{now_ts()}] [INFO] ports closed, session end")
-        print("[LOG] Closing session log")
+        logger.log_info("ports closed, session end")
         logger.close()
 
     return 0
 
 
 if __name__ == "__main__":
-    raise SystemExit(main())
+    raise SystemExit(main())
\ No newline at end of file
diff --git a/docs/instantel_protocol_reference.md b/docs/instantel_protocol_reference.md
index 372b1a7..4188c95 100644
--- a/docs/instantel_protocol_reference.md
+++ b/docs/instantel_protocol_reference.md
@@ -1,7 +1,7 @@
 # Instantel MiniMate Plus — Blastware RS-232 Protocol Reference
 ### "The Rosetta Stone"
 > Reverse-engineered via RS-232 serial bridge sniffing between Blastware software and an Instantel MiniMate Plus seismograph (S/N: BE18189).  
-> All findings derived from live packet capture. No vendor documentation was used.  
+> Cross-referenced against Instantel MiniMate Plus Operator Manual (716U0101 Rev 15) from v0.18 onward.  
 > **Certainty Ratings:** ✅ CONFIRMED | 🔶 INFERRED | ❓ SPECULATIVE
 > Certainty ratings apply only to protocol semantics, not to capture tooling behavior.
 
@@ -32,6 +32,14 @@
 | 2026-02-26 | §7.6 Channel Config Float Layout | **NEW SECTION:** Trigger level confirmed as IEEE 754 BE float in in/s. Alarm level identified as adjacent float = 1.0 in/s. Unit string `"in./s"` embedded inline. `0x082A` removed as trigger level candidate. |
 | 2026-03-01 | §7.6 Channel Config Float Layout | **UPGRADED:** Alarm level offset fully confirmed via controlled capture (alarm 1.0→2.0, trigger 0.5→0.6). Complete per-channel layout documented. Three-channel repetition confirmed (Tran, Vert, Long). Certainty upgraded to ✅ CONFIRMED. |
 | 2026-03-01 | §7.7 `.set` File Format | **NEW SECTION:** Blastware save-to-disk format decoded. Little-endian binary struct matching wire protocol payload. Full per-channel block layout mapped. Record time confirmed as uint32 at +16. MicL unit string confirmed as `"psi\0"`. `0x082A` mystery noted — not obviously record time, needs one more capture to resolve. |
+| 2026-03-02 | §7.4 Event Index Block | **CONFIRMED:** Backlight and power save offsets independently confirmed via device-set capture (backlight=100=0x64 at +75, power-save=30=0x1E at +83). On-device change visible in S3→BW read response — no Blastware write involved. Offsets are ✅ CONFIRMED. |
+| 2026-03-02 | §7.4 Event Index Block | **NEW:** `Monitoring LCD Cycle` identified at offsets +84/+85 as uint16 BE. Default value = 65500 (0xFFDC) = effectively disabled / maximum. Confirmed from operator manual §3.13.1g. |
+| 2026-03-02 | §7.4 Event Index Block | **UPDATED:** Backlight confirmed as uint8 range 0–255 seconds per operator manual §3.13.1e ("adjustable timer, 0 to 255 seconds"). Power save unit confirmed as minutes per operator manual §3.13.1f. |
+| 2026-03-02 | Global | **NEW SOURCE:** Operator manual (716U0101 Rev 15) added as reference. Cross-referencing settings definitions, ranges, and units. Header updated. |
+| 2026-03-02 | §14 Open Questions | Float 6.2061 in/s mystery: manual confirms only two geo ranges (1.25 in/s and 10.0 in/s). 6.2061 is NOT a user-selectable range → likely internal ADC full-scale calibration constant or hardware range ceiling. Downgraded to LOW priority. |
+| 2026-03-02 | §14 Open Questions | `0x082A` hypothesis refined: 2090 decimal. At 1024 sps, 2 sec record = 2048 samples. Possible that 0x082A = total samples including 0.25s pre-trigger (256 samples) at some adjusted rate. Needs capture with different record time. |
+| 2026-03-02 | §14 Open Questions | **NEW items added:** Trigger sample width (default=2), Auto Window (1-9 sec), Aux Trigger (enabled/disabled) — all confirmed settings from operator manual not yet mapped in protocol. |
+| 2026-03-02 | §14 Open Questions | Monitoring LCD Cycle resolved — removed from open questions. |
 
 ---
 
@@ -333,15 +341,41 @@ Unit 2: serial="BE11529"  trail=70 11   firmware=S337.17
 
 ### 7.4 Event Index Response (SUB F7) — 0x58 bytes
 
+> ✅ **2026-03-02 — CONFIRMED:** Backlight and power save offsets confirmed via two independent captures with device-set values. Offsets are from the start of the **data section** (after the 16-byte protocol header).
+
+**Layout (offsets relative to data section start):**
+
 ```
-Offset 0x00:  00 58 09            — Total index size or record count ❓
-Offset 0x03:  00 00 00 01         — Possibly stored event count = 1 ❓
-Offset 0x07:  01 07 CB 00 06 1E  — Timestamp of event 1 (see §8)
-Offset 0x0D:  01 07 CB 00 14 00  — Timestamp of event 2 (see §8)
-Offset 0x13:  00 00 00 17 3B     — Unknown ❓
-Offset 0x50:  10 02 FF DC        — Sub-block pointer or data segment header ❓
+Offset +00:  00 58 09            — Total index size or record count ❓
+Offset +03:  00 00 00 01         — Possibly stored event count = 1 ❓
+Offset +07:  01 07 CB 00 06 1E  — Timestamp of event 1 (see §8)
+Offset +0D:  01 07 CB 00 14 00  — Timestamp of event 2 (see §8)
+Offset +13:  00 00 00 17 3B     — Unknown ❓
+Offset +4B:  [backlight]         — BACKLIGHT ON TIME ✅ CONFIRMED
+Offset +4C:  00                  — padding (backlight is uint8, not uint16)
+Offset +53:  [power_save]        — POWER SAVING TIMEOUT ✅ CONFIRMED
+Offset +54:  [lcd_hi] [lcd_lo]  — MONITORING LCD CYCLE (uint16 BE) ✅ CONFIRMED
 ```
 
+| Offset | Size | Type | Known values | Meaning | Certainty |
+|---|---|---|---|---|---|
+| +4B | 1 | uint8 | 250, 100 | **BACKLIGHT ON TIME** (0–255 seconds per manual) | ✅ CONFIRMED |
+| +4C | 1 | — | 0x00 | Padding / high byte of potential uint16 | 🔶 INFERRED |
+| +53 | 1 | uint8 | 10, 30 | **POWER SAVING TIMEOUT** (minutes) | ✅ CONFIRMED |
+| +54..+55 | 2 | uint16 BE | 0xFFDC = 65500 | **MONITORING LCD CYCLE** (seconds; 65500 ≈ disabled/max) | ✅ CONFIRMED |
+
+**Confirmation captures:**
+
+| Capture | Backlight (+4B) | Power Save (+53) | LCD Cycle (+54/55) |
+|---|---|---|---|
+| `20260301_160702` (BW-written) | `0xFA` = 250 | `0x0A` = 10 min | `0xFF 0xDC` = 65500 |
+| `20260302_144606` (device-set) | `0x64` = 100 | `0x1E` = 30 min | `0xFF 0xDC` = 65500 |
+
+> 📖 **Manual cross-reference (716U0101 Rev 15, §3.13.1):**
+> - Backlight On Time: "adjustable timer, from 0 to 255 seconds" (§3.13.1e)
+> - Power Saving Timeout: "automatically turns the Minimate Plus off" — stored in minutes (§3.13.1f)  
+> - Monitoring LCD Cycle: "cycles off for the time period... set to zero to turn off" — 65500 = effectively disabled (§3.13.1g)
+
 ### 7.5 Full Waveform Record (SUB F3) — 0xD2 bytes × 2 pages
 
 > ✅ **2026-02-26 — UPDATED:** Project strings field layout confirmed by diffing compliance setup write payload (SUB `71`). Client field change `"Hello Claude"` → `"Claude test2"` isolated exact byte position.
@@ -741,24 +775,60 @@ The `.bin` files produced by `s3_bridge` are **not raw wire bytes**. The logger
 
 ## 14. Open Questions / Still Needs Cracking
 
-| Question | Priority | Added |
-|---|---|---|
-| Byte at timestamp offset 3 — hours, minutes, or padding? | MEDIUM | 2026-02-26 |
-| `trail[0]` in serial number response — unit-specific byte, derivation unknown. `trail[1]` resolved as firmware minor version. | MEDIUM | 2026-02-26 |
-| Full channel ID mapping in SUB `5A` stream (01/02/03/04 → which sensor?) | MEDIUM | 2026-02-26 |
-| Exact byte boundaries of project string fields in SUB `71` write frame — padding rules unconfirmed | MEDIUM | 2026-02-26 |
-| Purpose of SUB `09` / response `F6` — 202-byte read block | MEDIUM | 2026-02-26 |
-| Purpose of SUB `2E` / response `D1` — 26-byte read block | MEDIUM | 2026-02-26 |
-| Full field mapping of SUB `1A` / response `E5` — channel scaling / compliance config block | MEDIUM | 2026-02-26 |
-| `0x082A` in channel config block — not trigger, alarm, or record time. Likely one of the unknown uint16 fields (+0A to +10 in per-channel struct). Needs capture changing sample rate or histogram interval to isolate. | MEDIUM | 2026-03-01 |
-| Max range float = 6.2061 in/s — meaning unclear. UI shows "Normal 10.000 in/s" range setting. | LOW | 2026-02-26 |
-| Unknown uint16 fields at channel block +0A (=80), +0C (=15), +0E (=40), +10 (=21) — likely sensitivity, gain, or ADC config. | LOW | 2026-03-01 |
-| Full trigger configuration field mapping (SUB `1C` / write `82`) | LOW | 2026-02-26 |
-| Whether SUB `24`/`25` are distinct from SUB `5A` or redundant | LOW | 2026-02-26 |
-| Meaning of `0x07 E7` field in config block | LOW | 2026-02-26 |
-| MicL channel units — **RESOLVED: psi**, confirmed from `.set` file unit string `"psi\0"` | RESOLVED | 2026-03-01 |
+| Question | Priority | Added | Notes |
+|---|---|---|---|
+| Byte at timestamp offset 3 — hours, minutes, or padding? | MEDIUM | 2026-02-26 | |
+| `trail[0]` in serial number response — unit-specific byte, derivation unknown. `trail[1]` resolved as firmware minor version. | MEDIUM | 2026-02-26 | |
+| Full channel ID mapping in SUB `5A` stream (01/02/03/04 → which sensor?) | MEDIUM | 2026-02-26 | |
+| Exact byte boundaries of project string fields in SUB `71` write frame — padding rules unconfirmed | MEDIUM | 2026-02-26 | |
+| Purpose of SUB `09` / response `F6` — 202-byte read block | MEDIUM | 2026-02-26 | |
+| Purpose of SUB `2E` / response `D1` — 26-byte read block | MEDIUM | 2026-02-26 | |
+| Full field mapping of SUB `1A` / response `E5` — channel scaling / compliance config block | MEDIUM | 2026-02-26 | |
+| `0x082A` in channel config block — not trigger, alarm, or record time directly. **Hypothesis:** total sample count at 1024 sps: 2 sec record + 0.25 pre-trigger = 2.25 sec × ~930 sps? Or encoded differently. Capture with different record time needed. | MEDIUM | 2026-03-01 | Updated 2026-03-02 |
+| Unknown uint16 fields at channel block +0A (=80), +0C (=15), +0E (=40), +10 (=21) — manual describes "Sensitive (Gain=8) / Normal (Gain=1)" per-channel range; 80/15/40/21 might encode gain, sensitivity, or ADC config. | LOW | 2026-03-01 | |
+| Full trigger configuration field mapping (SUB `1C` / write `82`) | LOW | 2026-02-26 | |
+| Whether SUB `24`/`25` are distinct from SUB `5A` or redundant | LOW | 2026-02-26 | |
+| Meaning of `0x07 E7` field in config block | LOW | 2026-02-26 | |
+| **Trigger Sample Width** — setting confirmed in manual (default=2 samples, §3.13.1h). Location in protocol not yet mapped. | LOW | 2026-03-02 | NEW |
+| **Auto Window** — "1 to 9 seconds" per manual (§3.13.1b). Location in protocol not yet mapped. | LOW | 2026-03-02 | NEW |
+| **Auxiliary Trigger** — Enabled/Disabled per manual (§3.13.1d). Location in protocol not yet mapped. | LOW | 2026-03-02 | NEW |
+| **Max Geo Range float 6.2061 in/s** — NOT a user-selectable range (manual only shows 1.25 and 10.0 in/s). Likely internal ADC full-scale constant or hardware range ceiling. Not worth capturing. | LOW | 2026-02-26 | Downgraded 2026-03-02 |
+| MicL channel units — **RESOLVED: psi**, confirmed from `.set` file unit string `"psi\0"` | RESOLVED | 2026-03-01 | |
+| Backlight offset — **RESOLVED: +4B in event index data**, uint8, seconds | RESOLVED | 2026-03-02 | |
+| Power save offset — **RESOLVED: +53 in event index data**, uint8, minutes | RESOLVED | 2026-03-02 | |
+| Monitoring LCD Cycle — **RESOLVED: +54/+55 in event index data**, uint16 BE, seconds (65500 = disabled) | RESOLVED | 2026-03-02 | |
 
 ---
 
-*All findings reverse-engineered from live RS-232 bridge captures. No Instantel proprietary documentation was referenced or used.*  
+---
+
+## Appendix B — Operator Manual Cross-Reference (716U0101 Rev 15)
+
+> Added 2026-03-02. Cross-referencing confirms setting names, ranges, units, and behavior for fields found in protocol captures. The manual does NOT describe the wire protocol — it describes the user-facing device interface. Use to infer data types, ranges, and semantics of protocol fields.
+
+| Setting Name (Manual) | Manual Location | Protocol Location | Type | Range / Notes |
+|---|---|---|---|---|
+| Backlight On Time | §3.13.1e | Event Index +4B | uint8 | 0–255 seconds |
+| Power Saving Timeout | §3.13.1f | Event Index +53 | uint8 | minutes (user sets 1–60+) |
+| Monitoring LCD Cycle | §3.13.1g | Event Index +54/55 | uint16 BE | seconds; 0=off; 65500≈disabled |
+| Trigger Level (Geo) | §3.8.6 | Channel block, float | float32 BE | 0.005–10.000 in/s |
+| Alarm Level (Geo) | §3.9.9 | Channel block, float | float32 BE | higher than trigger level |
+| Trigger Level (Mic) | §3.8.6 | Channel block, float | float32 BE | 100–148 dB in 1 dB steps |
+| Alarm Level (Mic) | §3.9.10 | Channel block, float | float32 BE | higher than mic trigger |
+| Record Time | §3.8.9 | `.set` +16 confirmed | uint32 | 1–500 seconds |
+| Max Geo Range | §3.8.4 | Channel block, float | float32 BE | 1.25 or 10.0 in/s (user); 6.2061 in protocol = internal constant |
+| Microphone Units | §3.9.7 | Inline unit string | char[4] | `"psi\0"`, `"pa.\0"`, `"dB\0\0"` |
+| Sample Rate | §3.8.2 | Unknown — needs capture | — | 1024, 2048, 4096 (compliance); up to 65536 (advanced) |
+| Record Mode | §3.8.1 | Unknown | — | Single Shot, Continuous, Manual, Histogram, Histogram Combo |
+| Trigger Sample Width | §3.13.1h | **NOT YET MAPPED** | uint8? | Default=2 samples |
+| Auto Window | §3.13.1b | **NOT YET MAPPED** | uint8? | 1–9 seconds |
+| Auxiliary Trigger | §3.13.1d | **NOT YET MAPPED** | bool | Enabled/Disabled |
+| Password | §3.13.1c | Unknown | — | 4-key sequence |
+| Serial Connection | §3.9.11 | Unknown | — | Direct / Via Modem |
+| Baud Rate | §3.9.12 | Unknown | — | 38400 for direct |
+
+---
+
+*All findings reverse-engineered from live RS-232 bridge captures.*  
+*Cross-referenced from 2026-03-02 with Instantel MiniMate Plus Operator Manual (716U0101 Rev 15).*  
 *This is a living document — append changelog entries and timestamps as new findings are confirmed or corrected.*