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Overview

This page summarises our scopes in terms of their target application domains, who might use them, and where they can be stored. The “details” section lists unique benefits. From this we can choose which scopes to cull, and to see what would be interesting in the future.

One way of categorising scopes is by how often we expect to use them, which translates into where they should be stored:

  • electronics test bench: small, robust, easy-to-use scopes for casual use and everyday tasks
  • accessible shelf over the electronics test bench: unique features necessary for specific tasks, but may be large or awkward
  • high shelf elsewhere in G11: unique but flawed, or duplicated capabilities, or used if several scopes are required simultaneously for workshops
  • dispose, because poor quality or too many duplicates or slightly faulty

Another is by target application domain likely to be found in typical HackSpace projects. There is significant overlap between categories, and there are many other application domains.

Oscilloscopes are useless on their own - they also need probes to connect to the circuit. Probes are surprisingly fragile and significantly affect your measurements - see the Oscilloscope Probe page for more information. Note than none of the HackSpace probes are suitable for measuring mains voltages directly.

Safety

Oscilloscopes can be used dangerously, especially when connecting to anything connected to the mains voltages. Getting it wrong can result in loud noises followed by deathly slience. Obviously electrocution is a potential danger, but incorrect connections can also melt scope probes, cause fires, as well as destroying the scope or unit being tested. You may be surprised how mains earths can and do cause those problems.

Do not, under any circumstances whatsoever, disconnect an earth; the results can kill you or - worse - can kill someone else. Use the proper type of probe!

Read and understand the references in the 'Formal' and 'Praxis' sections of this page - and apply the knowledge before you make a connection.

Less seriously, if making X-Y measurements with an analogue scope (good luck with a digital scope!), do not leave a bright spot resting in a single location. It can damage the scope by burning the phosphor or, in extreme cases, localised heating can even crack the tube. Turn the brightness down or keep the spot moving.

Test Bench Accessible Shelf High Shelf Dispose Typical spec and examples
Audio Kenwood CS4125 Metrotest OX8020 <100kHz, mV - audio signals, sensors
Mechatronics Kenwood CS4125 Topward 7042 Metrotest OX8020 Wavetek 9020 <10MHz, 50mV-50V, - motors, actuators, machines
Agilent 54621 Hameg HM203 Gould OS300
Digital Agilent 54621 Schlumberger 5602.C Tektronix TDS340 <=60MHz, 500mV-5V, - well-behaved logic e.g. Arduino
Topward 7042
Signal Integrity Schlumberger 5602.C Tektronix TDS340 >=100MHz, 500mV-5V, medium-speed logic and checking valid logic levels, e.g. generic TTL, CMOS
High-speed - - - - >=250MHz, note not MS/s!

Details

Important features indicated by emphasis.

Electronics Test Bench
Kenwood CS4125 Agilent 54621
Location Test bench, since small and lightweight Test bench, since small and lightweight
Domain Audio, mechatronics Digital, mechatronics
Specification 20MHz, 1mV/div, analogue 60MHz, 10mV/div, digital
IEEE-488 interface
Waveform capture/measurements
Condition Excellent – everything just works Fully functional
Good standard controls Floppy inaccessible, repair unknown
Adequate UI
Comments First choice low-end scope First choice digital scope
Excellent for casual use UI makes it less suitable for casual use
Most sensitive scope Potential printout via IEEE-488 or floppy
See also Metrotest, Topward
USP Small, easy, sensitive Small, easy, fast
Accessible Shelf Above Test Bench
Schlumberger 5602.C Topward 7042
Location Floor under test bench, on end, for high speed measurement Test bench shelf, for when Kenwood CS4215 insufficient
Domain Medium speed digital, signal integrity Digital, mechatronics
Specification 100MHz, 10mV/div, digital 40MHz, 5mV/div, analogue
IEEE488 interface Dual timebase
Waveform capture/measurements Standard controls
Condition Fully functional Excellent – everything just works as expected
Appalling UI
Heavy, big, cannot keep on high/weak shelf
Comments The highest speed scopeExcellent scope
Not for casual use Service and operation manual
Potential printout via IEEE-488 Lightweight
See also Kenwood, Metrotest
USP 100MHz Small, medium speed, easy
High Shelf
Tek TDS340 Hameg HM203 Metrotest OX8020
Location High shelf, for occasional use High shelf, for use during workshops High shelf, for when Kenwood CS4215 insufficient
Domain Digital, signal integrity Audio, mechatronics Audio, mechatronics
Specification 100MHz, 1V/div, digital 20MHz, 5mV/div, analogue 20MHz, 1mV/div, hybrid analogue/digital
Display saved on floppy Dual timebase
Limited DSO features
Manual voltage and time cursors
Prints HPGL/HP-PCL to centronics/serial
Condition Ch1 broken Mainly functional, works nicely Fully functional
Ch2 only 1V/div and above Poor or strange controls UI a little odd; dim lights indicate important settings
Adequate UI X-shift knob missing
Light
Comments One of the higher speed scopes OK, unremarkable On loan from Lee Wiltshire
Only scope with screen capture Similar to Kenwood CS4215, Topward 7042
Dispose after we get another 100MHz scope with screen capture. Would be best low-end scope, except for awkward UI
USP Screen capture Nothing ⇒ candidate for disposal Sensitive, printing
For Disposal
Wavetek 9020 Gould OS300
Location Dispose Dispose, for use
Domain General, audio, mechatronics General, audio, mechatronics
Specification 20MHz, 5mV/div, analogue 20MHz, 2mV/div, analogue
Dual timebase
Condition Some ringing on digital transition Some ringing on digital transition
Some channel crosstalk Some channel crosstalk
Trigger on -ve slope broken External trig broken
Delayed timebase noisy
Ch1, Ch2 uncal switch noisy
Vert mode controls quirky
Poor but could be functional Usable for simple purposes
Comments Adequate low-end scope Adequate low-end scope
Repair required Usable without external trig
Lightweight
  • equipment/oscilloscopes.1457085494
  • Last modified: 6 years ago
  • by tggzzz