Tektronix 7912AD Programmable Digitizer Chassis IEEE-488 GPIB As-Is No Plugins

Tektronix 7912AD Programmable Digitizer Chassis IEEE-488 GPIB As-Is No Plugins

The Tektronix 7912AD is a large-format programmable digitizer chassis designed to work with Tektronix 7000-series plugin modules for high-speed waveform digitizing and storage. The 7912AD accepts vertical and horizontal plugin amplifiers in its front bay, then uses its onboard digitizer electronics to capture, store, and output waveform data — making it a foundational piece of high-bandwidth transient capture instrumentation from Tektronix's premier plugin-based test platform. This chassis is equipped with its original complement of internal boards and includes an IEEE-488 (GPIB) interface for computer-controlled operation.

Specifications & What's Included

• Make: Tektronix
• Model: 7912AD Programmable Digitizer
• Interface: IEEE-488 / GPIB (rear panel connector with NRFD/NDAC indicators visible)
• Power: 90–132V or 180–250V selectable, 48–440 Hz, 340 Watts
• Front panel controls: Operating Mode buttons (TV, Digital, Remote, Local, Lockout); Intensity, Graticule, Focus/Beam Finder controls
• Front panel outputs: VERT OUT, CAL OUT, TRIG OUT, Ground, Probe Power BNC connectors; ON/OFF switch
• Rear panel: Large cooling fan; SYNC and Comp Video Out BNC connectors; VERT IN, TRIG IN; Enable/Remote connectors; Principal Power Switch; IEC AC inlet; DANGER 10KV section (high-voltage CRT deflection area)
• Internal boards present (as documented by staff):
• 670-5157-01 / DA5618-03 — Power Connector board
• 670-4946-05 / D5104-03 — IEEE 488 Interface board
• 670-7642-00 / KA 8041-01
• 670-5145-02 / D-5217-04 — Video Processor & Scan Control
• 670-5147-03 — X & Y Ramp Generator
• 670-5146-00 / D5218-04 — Graticule Generator / D5222-04 Add Translator
• 670-5148-03 / DA5220-03 — Data Buffer
• 670-5156-02 / A18 — Data Memory
• 670-5149-03 / D5221-05 — Memory Control
• Video DC Level / Loop Gain module — PN 337-2485-00 (visible on interior black panel)
• NOT included: No probe, no vertical or horizontal plugin modules

Applications

The Tektronix 7912AD was a flagship programmable digitizer in Tektronix's 7000-series ecosystem, introduced in the late 1970s and used through the 1980s in high-speed transient capture, radar pulse analysis, laser diagnostics, nuclear event recording, and automated test systems. The 7000-series plugin architecture allowed a single chassis to serve many measurement roles by swapping vertical amplifier and timebase plugins — the 7912AD's digitizer electronics then captured the resulting waveform and made it available via IEEE-488 to controlling computers, a major capability for its era. These instruments were widely deployed in defense, aerospace, particle physics, and R&D laboratories where fast single-shot event capture was essential. Today, the 7912AD and its internal boards are sought by vintage test equipment restorers, collectors, and institutions maintaining legacy Tektronix 7000-series systems. Plugin modules (not included here) such as 7A-series vertical amplifiers and 7B-series timebases are a necessary complement to make the chassis operational.