Electronics/GDS-820S: Difference between revisions

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== GW Instek GDS-820S [FAULTY] ==
{{Equipment
| title = Oscilloscope
| description = Digital oscilloscope
| manufacturer = GW Instek
| model = GDS-820S
| image = InstekGDS-820S.jpg
| owner = Hackspace & Members
| induction = TBD
| rfid = No
| more_link =  
}}


== The Basics ==
An oscilloscope is a piece of electrical test equipment which allows you to visually see an electrical signal shown on a display.
== Specification ==
* GW Instek GDS-820S
* Digital storage oscilloscope (DSO)  
* Digital storage oscilloscope (DSO)  
* 2 channel  
* 2 channel  
* Bandwidth: Specmanship alert -> Data sheet indicates 150MHz bandwidth but it only has Real Time sample rate: 100MS/s maximum on each channel, Equivalent Time sample rate 25GS/s E.T. maximum on each channel, so not really a 150MHz scope unless you are talking about the equivalent time sample rate on a repetitive signal. You would normally want a sample rate on a scope of about 5-10x the bandwidth. So with a recurring digital signal you can build up a realistic waveform showing timing relationships, though no good for high speed non repetivive waveforms, ie if you have a clock to time a signal against, thats fine, but don't use it on a high speed single signal line. This type of specmanship occurred a lot on scopes of this era.
* Real Time sample rate: 100MS/s maximum on each channel  
* Equivalent Time sample rate: 25GS/s E.T. maximum on each channel
* Bandwidth: 150MHz effectively an equivalent time bandwidth. So not strictly speaking an 150MHz scope unless you are talking about the equivalent time sample rate on a repetitive signal.  
* 5.7 inch mono LCD (320x240)  
* 5.7 inch mono LCD (320x240)  
* FFT, 125k/CH
* FFT, 125k/CH
* RS232, USB and GPIB
* RS232, USB and GPIB
* Trigger DC-30MHz for 0.5div or 5mV, 30MHz to 150MHz 1.5 div or 15mV
* Trigger DC-30MHz for 0.5div or 5mV, 30MHz to 150MHz 1.5 div or 15mV
* Issues: Faulty needs repair. No power up. Looks like a PSU fault, cannot see any output voltage on 5v lines, haven’t measured the other lines. U2,3,4 appear to have been modified, but still not functioning. The transformer looks like it has suffered from some heating. Not sure if this occurred due the fault of during manufacture.  
* Issues: Faulty needs repair. No boot. Power board was repaired previously. The firmware was reflashed and unit previously worked, but is now not functioning. Try re-flashing.
* Manual: TBD
* Manual: TBD
* Owner: Fligg
* Owner: Fligg
== Calibration ==
The spaces oscilloscopes will NOT normally have a calibration certificate. Most will be well outside their calibration date. Having said that it is common to perform a basic oscilloscopes calibration check before each use against a known calibration source to confirm it is suitable for use. Most oscilloscopes have a calibration signal output point on the front panel. Some have rear panel outputs.
== Induction ==
Ask on the mailing list for volunteers to demonstrate the use of any of the test equipment.
== Safety ==
Unless you are very experienced with an oscilloscope then it is not advisable to probe high voltages or high power sources. It is possible to electrocute yourself or damage the oscilloscope. Special oscilloscope probes and specific connection methods are needed for probing high voltage and mains electricity signals. The oscilloscopes are replaceable, you are not! We want you to be safe.
Oscilloscopes can be heavy instruments. Bend at the knees when lifting and ask for help if you find the instrument too heavy to move.
Do not leave oscilloscope probes (or any wires) hanging over the edge of a bench or on the floor. You will stand on or trip over them.
== Useful References ==
* [http://www.tek.com/learning/oscilloscope-tutorial Tektronix oscilloscope tutorials]
* [https://www.youtube.com/watch?v=xaELqAo4kkQ EEVblog #279 - How NOT To Blow Up Your Oscilloscope!]

Revision as of 13:57, 2 April 2016

Oscilloscope
File:InstekGDS-820S.jpg
Digital oscilloscope
Equipment Information
Status Unknown
Manufacturer GW Instek
Model GDS-820S
Hackspace Information
Induction Required Yes
Induction Information Here
Card RFID Enabled No
Owner Hackspace & Members


The Basics

An oscilloscope is a piece of electrical test equipment which allows you to visually see an electrical signal shown on a display.

Specification

  • GW Instek GDS-820S
  • Digital storage oscilloscope (DSO)
  • 2 channel
  • Real Time sample rate: 100MS/s maximum on each channel
  • Equivalent Time sample rate: 25GS/s E.T. maximum on each channel
  • Bandwidth: 150MHz effectively an equivalent time bandwidth. So not strictly speaking an 150MHz scope unless you are talking about the equivalent time sample rate on a repetitive signal.
  • 5.7 inch mono LCD (320x240)
  • FFT, 125k/CH
  • RS232, USB and GPIB
  • Trigger DC-30MHz for 0.5div or 5mV, 30MHz to 150MHz 1.5 div or 15mV
  • Issues: Faulty needs repair. No boot. Power board was repaired previously. The firmware was reflashed and unit previously worked, but is now not functioning. Try re-flashing.
  • Manual: TBD
  • Owner: Fligg

Calibration

The spaces oscilloscopes will NOT normally have a calibration certificate. Most will be well outside their calibration date. Having said that it is common to perform a basic oscilloscopes calibration check before each use against a known calibration source to confirm it is suitable for use. Most oscilloscopes have a calibration signal output point on the front panel. Some have rear panel outputs.

Induction

Ask on the mailing list for volunteers to demonstrate the use of any of the test equipment.

Safety

Unless you are very experienced with an oscilloscope then it is not advisable to probe high voltages or high power sources. It is possible to electrocute yourself or damage the oscilloscope. Special oscilloscope probes and specific connection methods are needed for probing high voltage and mains electricity signals. The oscilloscopes are replaceable, you are not! We want you to be safe.

Oscilloscopes can be heavy instruments. Bend at the knees when lifting and ask for help if you find the instrument too heavy to move.

Do not leave oscilloscope probes (or any wires) hanging over the edge of a bench or on the floor. You will stand on or trip over them.

Useful References