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GE DS3800NADB1B1B

Product Name:​ Mark IV NADB Analog/Digital Conversion Motherboard
Product Introduction:​ Speedtronic Mark IV analog-front-end board; hosts 12-bit ADC and interfaces field analog to Mark IV voter logic; accepts daughterboard DS3800DADB to augment capacitance.
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Detailed content

Technical Specifications:
  • ADC: 12-bit, DTL/TTL compatible outputs
  • Signals: analog in (scaled), sync, com, aout test points
  • Indicators: 1 amber “P OK” LED
  • Test Points: COM, SYNC, AOUT
  • Connectors: 1 female, 1 male, 1 ribbon to daughterboard
  • Form: Mark IV large-format PCB with extractor arms
Functional Features:​ Parallel/serial data out, negative-true logic, spare PTH for field mods, stackable daughtercard.
Application Scenarios:​ Mark IV gas/steam turbine analog signal digitization (temp, pressure, speed-derived).
Material Composition:​ FR4, DTL/TTL ICs, 12-bit ADC with sample-hold, ceramic + film caps.
Structural Characteristics:​ Green baseboard, alignment marks, corner extractor clips, center spare holes.
Working Principle:​ Field analog buffered → 12-bit ADC clocks conversion → DTL/TTL word placed on Mark IV data path.
Installation Requirements:​ Seat daughterboard DS3800DADB if original BOM calls for it; verify jumper map before power.
Usage Notes:​ Handle by edges; “P OK” off means +5 V absent or logic fault—do not run turbine control on it.

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