7250

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Tektronix 7250
6 GHz Transient Digitizer
Tektronix 7250 aka Intertechnique IN7000

Produced from 1986 to 1992(?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 7250 is a digitizing oscilloscope with 6 GHz bandwidth, optimized for digitizing single-shot events. It uses a scan converter CRT for digitizing. From the scan converter, the trace is transferred to memory boards containing conventional RAM.

The input is through a 50 Ω N connector on the rear panel, which loops through, rather than being terminated internally. Like in the 519, there is no vertical amplifier.

The captured waveform can be transferred to a computer via a GPIB interface or can be viewed on the built-in monitor, which is a conventional computer-style CRT display and has menus.

At 60 kg (132 pounds), it is the heaviest one-piece oscilloscope ever sold by Tektronix. It was made by Intertechnique in France where it was sold as the IN7000, and rebranded by Tektronix for sale in the United States.

Key Specifications

     — 7250 mainframe
Bandwidth 6 GHz (measured as -3 dB @ 7 GHz, -6 dB @ 9.6 GHz, and -8.5 dB @ 14 GHz in Haas, Warman, van Ewijk, Rev. Sci. Instrum. 60 (3), March 1989)
Rise time 50 ps
Resolution Vertical, 11 bits. The digitizer captures 512 samples in one shot.
Sweep 1 μs/Div to 50 ps/Div (1-2-5), equivalent to max. ~1 terasample per second
Sensitivity fixed 500 mV/Div (no vertical amplifiers in the signal path)
Max. input 2 kV spikes < 1 μs
Triggering External only, requires 50 ns pretrigger signal
     — 7250 Opt. 01 External Delay Line
Bandwidth 4.5 GHz
Rise time ≤75 ps
Delay 55 ns
Attenuation 4.5 dB
Input / output 50 Ω N connectors
Trigger pickoff 20 dB attenuation, 300 ps rise time, BNC connector

Links

Prices

  Year 1988 1990
7250 Catalog price $99,995 $104,000
2016 value $204,000 $192,000
Opt. 01 Ext. Delay Line Catalog price $12,500 $12,500
2016 value $25,500 $23,000

Issues

The 7250 has two 3.6 V ½AA lithium batteries on each memory board. With time, these batteries die, which will cause the 7250 to fail its power-on self test. New replacements are still (2011) widely available.

Pictures

Components

Some Parts Used in the 7250

Part Part Number(s) Class Description Used in
EF9366 Monolithic integrated circuit Graphics display controller 7250
MC68488 156-1246-00 Monolithic integrated circuit GPIB controller 7250 7854 CG551AP Keithley 181
Motorola 6800 156-0426-00 Monolithic integrated circuit 8-bit microprocessor 021-0206-00 021-0374-00 067-0902-00 067-1137-99 222 222A 222PS 2424L 2445 2465 2467 4051 7250 7912 7912AD 7A16P 7A29P 7B81P 7B90P 833 834 CG5001 CG551AP CG5010 CG5011 DF1 DF2 DM5010 MI5010 SI5010 PS5004 PS5010 SG5010 Keithley 181 Keithley 175 Keithley 175A Keithley 192 Keithley 195A Keithley 197 Keithley 220 Keithley 230 Keithley 485 Keithley 580
Motorola 6821 156-0427-03 156-1205-00 Monolithic integrated circuit "Peripheral Interface Adapter (PIA)" 067-1137-99 7250 7A16P 7A29P 7B90P
TL494 Monolithic integrated circuit PWM switch-mode controller 2225 7250