7104

Manuals – Specifications – Links – Pictures

The Tektronix 7104 is a 1 GHz, non-storage 7000-series oscilloscope mainframe that takes two 7000-series vertical plug-ins and two 7000-series horizontal plug-ins. It was introduced in 1978. There is also a rack-mount version, the R7103, albeit with only one horizontal bay.

The scope employs a micro-channel plate CRT design to get good screen intensity at high sweep speeds with moderate acceleration voltage.

The 7A29 1 GHz vertical amplifier and the 7B15/7B10 time base pair were introduced along with the 7104 to match the system bandwidth.

Option 2 adds a horizontal delay line for extended-frequency X-Y operation.

Key Specifications

Bandwidth	1 GHz (with 7A29) – rise time < 350 ps
Fastest calibrated sweep	200 ps/Div (with 7B10)
Calibrator	40 mV to 4 V (p-p) in decade steps, 1 kHz; 4 mV to 400 mV into 50 Ω; 40 mA with adapter
Y delay line	51 ns (frequency compensated coax pair)
X-Y phase shift	base model: < 2° from DC to 50 kHz Opt. 2: < 2° from DC to 50 MHz (with a pair of 7A19 or 7A29, at least one of which has the variable delay option
Acceleration voltage	12.5 kV
CRT	T7100-31-2 Micro channel plate CRT (154-0783-00), P31 phosphor, 8 × 10 Div. @ 8.5 mm, resolution 17 lines / Div.
Power consumption	215 W
Dimensions	345 mm (h) × 305 mm (w) × 592 mm (l)
Weight	19.8 kg (43.6 lb)
Features	Readout 2 probe power connectors

Internals

The 7104 makes extensive use of custom integrated circuits and hybrid circuits, inter alia, the 155-0174-00 Delay Line Compensator, 155-0173-00 Vertical Channel Switch, 155-0176-00 Vertical Output Amplifier, 155-0194-00/01/02/03 CRT Termination, 155-0175-00 Trigger Amplifier, 155-0178-00 Horizontal Output Amplifier, 155-0012-00 Z-Axis controller/amplifier, and 155-0067-02 SMPS controller.

Prices

	Year	1980	1984	1990
Mainframe only	Catalog price	$14,400	$21,380	$29,995
	2014 value	$41,570	$48,940	$54,590
Mainframe with 7A29, 7A29 Opt. 04, 7B15, 7B10	Catalog price	$21,730	$31,875	$44,510
	2014 value	$62,720	$72,970	$81,000

Links

• Hans Springer's 1979 Electronic Design article on 7104
• Reading Jim Williams: Scope Sunday 4
• Tek 7104 page @ amplifier.cd
• http://www.barrytech.com/tektronix/tek7000/tek7104.html
• The 7104 - faster than light?

Pictures

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Measurements

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  Rise time measurement. 150 ps risetime pulse from 067-0587-02 at 100 Hz repetition rate. Measured 240 ps (corrected for 150 ps fixture rise time: 190 ns = 1.8 GHz)

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  Rise time measurement as before, 1000 Hz repetition rate at same brightness settings.

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  7104 recording a single shot pulse (from 067-0587-02) at 200ps/Div. Camera: Nikon D7100, 50 mm f/1.4, ISO 3200, 1/2 s. CRT filter not removed.

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  7104 recording 1 GHz sine, single shot at 200ps/Div. Camera: Nikon D7100, 50 mm f/1.4, ISO 3200, 1/2 s. CRT filter not removed. CRT amplification loss is evident around the center line.