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Knowledge Base

Which oscilloscope probe is best for my application

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
Selecting the correct oscilloscope probe is very important for making quality measurements. If the probe performance is not adequate or if you did not select the proper probe for your application, you will see distorted or misleading signals on your oscilloscope. There are two kinds of probes, passive and active. Active probes requires power while passive probe do not. For general-purpose measurem...

Using a Rigol product key to generate a Rigol software licence code.

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
Please note... You must enter the product key exactly as it appears on the certificate. The serial number is made up of capital letters and numbers only - There are no lower case letters and no spaces. Please take care when entering the serial number! If you enter an incorrect but valid serial number, the generated software licence code will not b...

RIGOL scope has a message on screen saying WAIT (in green). All channels ON but I see no signal being displayed. Is this effect to do with triggering?

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
Yes, you’re right: a WAIT status message is normal behaviour for the Trigger when the scope is not being given quite the right signal for its trigger to fire: - You’ll probably remember on all analogue scopes, there are at least two modes: Auto and Normal (sometimes also Single). - Normal is where the trace waits for each trigger before it starts to trace across the screen (we all remember t...

How can I use Ultra Sigma to grab data from my RIGOL Scope? E.g. CSV file for viewing in Excel?

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
First of all, install and run Ultra Sigma, - Then make sure you can see your scope (Type shown in the Instruments window of Ultra Sigma) - AND that the scope response with its serial number to a *IDN? command. (Rt-click on instrument and choose SCPI Panel Control window, then click Send&Receive a *IDN?) Once this is OK, Change the setting shown as Base to Advanced (U'Sigma setting drop do...

How to measure an RF Amplifier using a DSA-800 Series Spectrum Analyser

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
Solution: This document provides step-by-step instructions on using the Rigol DSA-800 series of Spectrum Analysers to measure the characteristics of an RF Amplifier. In addition to the DSA-800 Spectrum Analyser, you will need an RF Source, cabling, and adapters. Measure the amplifier 1. Connect the RF generator output to the RF input of the instrument using the appropriate cabling and con...

How do I measure an RF Bandpass filter

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
This document provides step-by-step instructions on using the Rigol DSA-800 series of Spectrum Analysers to measure the characteristics of an RF Bandpass filter. NOTE: The DSA must have a Tracking Generator to effectively perform the following test. Normalize the trace (Optional) Many elements in an RF signal path can have nonlinear characteristics. In many cases, these nonlinear effects on...

EMC Precompliance: Testing on a budget

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
Solution: Almost any electronic design slated for commercial use is subject to EMC (Electromagnetic Compatibility) testing. Any company intending to sell these products into a country must ensure that the product is tested versus specifications set forth by the regulatory body of that country. Here in the US, the FCC specifies rules on EMC testing. CISPR and IEC are also used throughout the worl...

AMK: What do you get with the DSA Advanced Measurement Kit ? (DSA1000-AMK)

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
Advanced Measurement Functions Option DSA1000-AMK provides plenty of advanced measurement functions including T-Power (Time domain Power), ACP (Adjacent Channel Power), Chan Pwr (Channel Power), OBW (Occupied Bandwidth), EBW (Emission Bandwidth), C/N Ratio, Harmo Dist (Harmonic Distortion), TOI (Third Order Intermodulation) and Pass/Fail. The measure mode can be Single or Continuous and you can c...

Is there an attenuator built-in on RIGOL’s DSA815?

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
Yes, but you should still take care never to exceed the DSA815's max input power or voltage (+20dBm or 100mW and 50VDC abs. max - pulsed waveforms can easily exceed this e.g. direct from a LISN - see below). The DSA internal attenuator function is variable to give relative 0-30dB and whilst it does not increase the permissible power, it is designed to allow the instrument to optimise its dynamic r...

I just received mine… how can I tell if it’s working OK?

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
First follow the procedure for Factory Reset. Then check the noise performance is as it should be. You will need a carefully sequence of settings for this… use the quick video tip on our RIGOL pages....

How to reduce or lower noise floor? (DSA815 and DSA1030)

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
How to reduce or lower noise floor? (DSA815 and DSA1030) Last Updated: 01/08/2014 A simple sequence of settings will help you dig into the noise floor. With any Spectrum Analyser, setting up the (1) Span, (2) Attenuator, (3) Pre-amp and (4) Resolution Bandwidth settings - these are all important starting points to getting the best noise floor. Remember, safety first (no input or power RF nearby)...

How to get the specified DANL of -135dBm? (typ, +6dB f/GHz)

Posted on: December 14th, 2020 by Doug Lovell

14/12/2020
A simple sequence of settings will help you dig into the noise floor. With any Spectrum Analyser, setting up the (1) Span, (2) Attenuator, (3) Pre-amp and (4) Resolution Bandwidth settings - these are all important starting points to getting the best noise floor. Remember, safety first (no input or power RF nearby) and try adjusting these four settings to find out more about what to turn on, and o...

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