Showing Results for Tektronix 7854

The Tektronix 7854 Oscilloscope goes far beyond what its name implies. It is much more than a standard oscilloscope. It is an oscilloscope enhanced by a small onboard computer. Waveforms acquired throught its 400 MHz mainframe can be displayed in real time or digitized and stored in memory for later analysis. A good share of the waveform analysis can be done via the internal microprocessor and firmware of the 7854. Many individual functions, such as waveform maximum, minimum, RMS value, integration, and differentiation, are provided as single keys on the attached Waveform Calculator. You can also combine and store these keystroke functions as programs.

Beyond its functionality as a powerful stand-alone measurement and analysis tool, the 7854 can also be used as a system component. It contains a GPIB interface conforming to IEEE Standard 488-1978. Thus the capabilities and capacities of the 7854 can be further extended by adding a GPIB compatible desk-top computer or a minicomputer. The combination can be multi-purpose, from providing more program and waveform storage space to providing additional computational power.

The 7854 oscilloscope system provides exceptional flexibility in operation with a wide choice of general and special purpose plug-in units. The following is a sampling of plug-in units that work with the 7854 - the time-base plug-ins. The 7854 is compatible with all 7000-series plug-in units.

• 7B10: Delayed sweep, 500 ps/div, DC to 400 MHz
• 7B15: Delaying sweep, 500 ps /div, DC to 400 MHz
• 7B70: Delayed sweep and external amplifier: 2 ns/div, DC to 200 MHz
• 7B71: Delaying sweep: 2 ns/div, DC to 200 MHz
• 7B80: Delayed sweep: 1 ns/div, DC to 400 MHz
• 7B85: Delaying sweep: 1 ns/div: DC to 400 MHz
• 7B87: Pretrigger acquire clock, 1 ns/div, DC to 400 MHz
• 7B92A: Display switching: 500 ps/div: DC to 400 MHz

The 7854 Oscilloscope system can be operated in any of three distinct display modes - SCOPE, STORED, or BOTH - as selected with the keys located in the CRT DISPLAY blocks on either the measurement or Waveform Calculation keyboards.

The 7854 became obsolete in 1988.

• Real-time vertical system
  • System bandwidth: Varies with plug-in unit
  • System rise time: Varies with plug-in unit
  • Channel isolation (not ADD): At least 100:1 from DC to 250 MHz, and at least 40:1 from 250 MHz to 475 MHz
  • Difference in signal delay between channels (ext trigger): ≤60 ps
  • Difference in signal delay between channels (int trigger): ≤200 ps
• Real-time horizontal system:
  • Linearity at 1 ms/div: ≤0.05 div error at each graticule line after adjusting for no error at the second and tenth graticule lines
  • Fastest calibrated sweep rate: 500 ps/div
  • Horizontal bandwidth referenced to 10 div of 50 kHz: DC to at least 1 MHz (-3 dB)
  • Phase shift between vertical and horizontal systems: ≤2°