7633

Manuals – Specifications – Links – Pictures

The Tektronix 7633 is a 100 MHz, multi-mode storage mainframe that accepts two 7000-series vertical plug-ins and one 7000-series horizontal plug-in. There is also a rack-mount version, the R7633.

The 7633 is essentially a 7623 with a reduced-scan mode added to boost stored writing speeds.

After the 7633 and 7934 were discontinued in 1990, the 7623B (which added the reduced-scan mode to the 7623 and therefore had essentially the same specs and features as the 7633) was the last analog storage scope model in the 7000 series, available until the entire 7000 family was discontinued in 1992.

Key Specifications

Bandwidth	100 MHz
Fastest cal. sweep	5 ns/Div
Display modes	store, non-store, save
Storage modes	fast variable-persistence, variable-persistence, fast bistable, bistable
Scan modes	normal scan, reduced-scan mode for increased writing speed
Stored writing speed	Mode Reduced Scan Full Scan fast var persist 2222 Div/μs 150 Div/μs fast bistable 400 Div/μs 50 Div/μs var persist 3 Div/μs 0.5 Div/μs bistable 0.2 Div/μs 0.03 Div/μs
CRT	8 × 10 divisions @ 0.9 cm, Tek T7630 (154-0721-00) transfer storage tube, P31 phosphor
Acceleration voltage	8.5 kV (10 kV in the reduced scan mode)
Features	digital readout calibrator, 1 kHz square wave, 40 mV, 400 mV and 4 V camera connector, external Z-axis input
Power.	max. 190 W
Weight	13.6 kg (30 lb)

Internals

The 7633 uses a Transfer storage CRT which includes an internal, fast-responding storage mesh. In fast mode, the time base is inhibited after a sweep, and the transfer cycle is started. Individual sweeps therefore occur in about one-second intervals.

The 7633, like the other 76xx models, has a linear supply which does not provide +5 V for lights (A9) without modification.

Prices

Year	1974	1980	1990
Catalog price	$3,650	$5,615	$10,500
In 2021 Dollars	$20,500	$18,800	$22,200

Links

• Tek 7633 page @ amplifier.cd (with repair report)
• Tek 7633 page @ barrytech.com
• A 1000 cm/µs Storage Oscilloscope. Tekscope Vol 6 Number 2, Mar/Apr 1974 (PDF, 15M) or @ radiomuseum.org

Pictures

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  Rackmount 7633 with two 7S11 and a 7T11 displaying 2 GHz sinewave

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  reduced scan mode

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  A10 HV late version

CRTs used in the 7633

Page	Part nos	Description	Designers	Used in
T7630	154-0721-00	transfer storage CRT		7633

Custom ICs used in the 7633

Custom ICs used in the 7000 series readout system

Page	Model	Part nos	Description	Designers	Used in
155-0014-01	M019D	155-0014-00 • 155-0014-01	analog-to-decimal converter	Barrie Gilbert	7000 series readout system • 7854 • 7934 • 7J20 • 7L5 • P7001
155-0015-01	M020F	155-0015-00 • 155-0015-01	analog data switch	Barrie Gilbert	7000 series readout system • 7854 • 7934
155-0017-00	M025	155-0017-00	5 MHz decade counter	Barrie Gilbert	7000 series readout system • 7854 • 7934
155-0018-00	M026	155-0018-00	zeros logic control	Les Larson	7000 series readout system • 7934
155-0019-00	M027	155-0019-00	decimal point and spacing control	Les Larson	7000 series readout system
155-0020-00	M028	155-0020-00	output assembler	Les Larson	7000 series readout system
155-0021-00	M029C	155-0021-00 • 155-0021-01	timing generator	Les Larson	7000 series readout system • 7854 • 7934
155-0023-00	M160	155-0023-00	character generator (0 1 2 3 4 5 6 7 8 9)	Barrie Gilbert	7000 series readout system
155-0024-00	M161	155-0024-00	character generator (↓ < I / + - + C Δ >)	Barrie Gilbert	7000 series readout system
155-0025-00	M162	155-0025-00	character generator (m μ n p X K M G T R)	Barrie Gilbert	7000 series readout system
155-0026-00	M163	155-0026-00	character generator (S V A W H d B c Ω E)	Barrie Gilbert	7000 series readout system
155-0027-00	M164	155-0027-00	character generator (U N L Z Y P F J Q D)	Barrie Gilbert	7000 series readout system