7D12

Tektronix 7D12
digital meter plugin 7D12 with M2 Sample and Hold Module Compatible with 7000-series scopes Produced from 1974 to 1986 Manuals Tektronix 7D12 Service (OCR) M1-M2-M3 Operators Manual Tektronix M1 Interim Manual M2 Sample/Hold M3 RMS Module 7000 Series Digital Plug-In Applications (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix 7D12 is an A/D converter (digital meter) plug-in for 7000-series scopes. The A/D converter can be triggered internally (when installed in a horizontal bay), manually by a front panel switch, or externally from a trigger source. The 7D12 will trigger automatically at approximately 4 Hz if set to Auto. It contains a vertical display amplifier that displays the signal being applied to the module and a gate display amplifier that displays a representation of the 7D12 internal gate signal.

The 7D12 accepts plug-in modules M1, M2, or M3.

M1 is a digital multimeter module with DC voltage, resistance and temperature (with P6058) ranges. It does not produce an analog output signal.
M2 is a sample and hold module that can measure voltage from ground to a selected point, or the difference voltage between two points defined by a trigger signal. When triggered by the delayed gate signal from a time base, this allows cursor-like measurements to be made. The module has an aperture time of only 10 ns. With repetitive signals, the period between the sampled points can be as short as 30 ns, in single shot mode it must be at least 150 μs.
Input sensitivity is selectable between ±2 V (100/200/500 mV/Div) and ±20 V (1/2/5 V/Div) ranges. The input has a ring to detect a ×10 probe with readout pin (P6055 recommended) and adjusts the display accordingly. Signal bandwidth is 25 MHz.
M3 is a True RMS module with floating inputs. It produces an analog output signal with a 3 dB bandwidth of 700 kHz and vertical sensitivities between 100 mV/Div to 500 V/Div in a 1−2−5 sequence. The RMS converter is implemented with opamps, a dual transistor, and transistors from a CA3046 array.
067-0700-00 is a calibration fixture.

Links

Documents Referencing 7D12

Document	Class	Title	Authors	Year	Links
Tekscope 1973 V5 N6 Nov 1973.pdf	Article	A fast A/D plug-in for the oscilloscope	Hideki Iwata • Ken Sternes	1973	7D12 • M1 • M2 • M3
Tekscope 1975 V7 N5.pdf	Article	Delayed Gate Aids Oscilloscope Digital Measurements	Dave McCullough	1975	7D12 • 7D14 • 7D15 • 7B53A
7000 Series Digital Plug-In Applications.pdf	Application Note	7000 Series Digital Plug-In Applications		1977	7D10 • 7D11 • 7D12 • 7D13 • 7D14 • 7D15

Patents that may apply to 7D12

Page	Title	Inventors	Filing date	Grant date	Links
Patent US 3562464A	Cam actuated switch having movable and fixed contacts on circuit board	Howard Vollum • Willem H Verhoef • Tony Sprando	1968-10-07	1971-02-09	Cam switches • 2101 • 2701 • 2703 • 432 • 434 • 465 • 475 • 5A15N • 5A18N • 5A20N • 5A21N • 5A38 • 5A45 • 5B10N • 5B12N • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7B10 • 7B15 • 7B50 • 7B51 • 7B52 • 7B53A • 7B50A • 7B70 • 7B71 • 7B80 • 7B85 • 7B87 • 7B92 • 7B92A • 7D01 • 7D12 • 7D15 • 7J20 • 7S12 • 7T11 • 7T11A • AF501 • AM502 • AM503 • DC502 • DC503 • DC504 • DC505 • DM501 • DM502 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • PG501 • PG502 • PG505 • PG506 • PG506A • PG508 • TG501 • SC502 • SC503 • SC504
Patent US 3584174A	Push-button switch apparatus having cam actuated switch contacts and selective illumination means	Tony Sprando • Peter S Winkelmann	1969-06-09	1971-06-08	Back-lit switches • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A16P • 7A22 • 7A42 • 7B42N • 7B50 • 7B51 • 7B52 • 7B53A • 7B70 • 7B71 • 7B92 • 7B92A • 7D10 • 7D11 • 7D12 • 7D114 • 7D15 • 7D20 • 7F10 • 7L5 • 7L12 • 7L13 • 7L14 • 7L18 • 7M13 • 7S11 • 7S12 • 7T11 • 067-0587-00 • 067-0587-01 • 067-0587-02 • 067-0587-10

Pictures

7D12 with M2 Sample and Hold Module
7D12 with M1, M2 and M3
7D12 without plug-in, left side
7D12 without plug-in, right side
7D12 with M2 plug-in, left side
7D12 with M2 plug-in, right side
067-0700-00 calibration plug-in

M1

M1 plug-in, front
M1 plug-in, rear

M2

M2 front
M2 plug-in, left side
M2 plug-in, right side
7D12/M2 displaying sawtooth from 585 (lower trace), triggered with delayed gate output from a 7B53A (intensified).
"Master Sampler" cartoon in schematic

M3

M3 plug-in, front
M3 plug-in, rear
"Least Significant Digit Blanking" cartoon in schematic

Components

Some Parts Used in the 7D12

Part	Part Number(s)	Class	Description	Used in
155-0022-00	155-0022-00 • 155-0022-01	Monolithic integrated circuit	analog multiplexer	147 • 148 • 149 • 335 • 468 • 1430 • 1441 • 1461 • 1900 • 1910 • 2220 • 2221 • 2230 • 5223 • 5403 • 5440 • 5441 • 5443 • 5444 • 5A38 • 7313 • 7403N • 7503 • 7504 • 7514 • 7603 • AN/USM-281C • 7613 • 7623 • 7623A • 7633 • 7704 • R7704 • 7704A • 7834 • 7844 • 7854 • R7912 • 7912AD • 7912HB • 7904 • R7903 • 7904A • 7934 • 7A12 • 7A18 • 7A18A • 7A18N • 7B52 • 7B53N • 7D10 • 7D11 • 7D12 • NT-7000 • P7001
155-0090-00	155-0090-00 • 155-0090-01 • 155-0090-02	Monolithic integrated circuit	four-decade counter, latch and D/A converter	7B85 • 7D01 • 7D12 • 7D15 • 7J20
155-0171-00	155-0171-00	Monolithic integrated circuit	four-decade counter, latch and D/A converter	7B85 • 7D01 • 7D12 • 7D15 • 7J20
2N4851	151-0504-00 • 151-0504-01	Discrete component	silicon unijunction transistor	DC501 • DC502 • DC503 • DC503A • DC504 • DC505 • DC505A • DC508 • DC508A • LA501 • R1330 • 212 • 214 • 4002A • 4623 • 4631 • 4632 • 4633A • 4634 • 4701 • 4701R • 670-0696-01 • 670-1274-00 • 670-1981-00 • 670-1981-01 • 7D01 • 7D12 • 7L12
CA3046	156-0048-00	Monolithic integrated circuit	transistor array	4601 • 7104 • 7403N • 7503 • 7B53A • 7D12 • DM502 • FG504 • S-52 • Telequipment D34 • 7603 • 7613 • 7623 • 7633 • FG507 • Keithley 227