Knowledge Base:  
Knowledge Base > Spectrum Analysers --> Knowledge Base > Spectrum Analysers
test
Last Updated: 19/08/2014
How to measure an RF Attenuator


using a DSA815-TG Spectrum Analyzer
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
Attenuator.
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 your base measurements can be minimized by
normalizing the instrument.
1. Connect tracking generator output to RF input using the same cabling that
you will be using to test your device. Any element, like an adapter, used
during normalization should also be used during device measurement as any
changes to the RF signal path could effect the accuracy of the measurement.
2. Enable the tracking generator by pressing the TG button > TG On
3. Store the reference trace by pressing the TG button > Normalize > Stor Ref
4. Enable normalization by pressing the TG button > Normalize > Normalize
On. Also set the Norm Ref Lvl to 0dB as shown below







Measure the Attenuator

1. Connect the tracking generator output to the filter input using the appropriate
cabling and connectors.
2. Connect the filter output to the instrument RF input.

3. Set the tracking generator amplitude to 0dB by pressing the TG button and the TG
Amplitude. You can use the keypad or wheel to enter the correct value.

4. Enable the Tracking generator by pressing the TG button > RF Source ON


5. You can now enable the Marker function to measure the
attenuation characteristics of the filter.
6. Press Marker Fctn > N dB BW and set the function to the amplitude of
interest. In this example, we are measuring the 3dB Bandwidth of our filter


7. You should now be able to change the dial on the attenuator and test it at each level.

Was this article helpful?

Comments:
 

Related Articles
 > Is there an attenuator built-in on RIGOL's DSA815?
 > Is there an attenuator built-in on RIGOL's DSA1030?
 > Are there any independent reviews of RIGOL Spectrum Analysers like DSA815 in the UK?
 > How do I add a horizontal Display Line to my DSA screen?
 > How to reduce or lower noise floor? (DSA815 and DSA1030)
 > How to get the specified DANL of -135dBm? (typ, +6dB f/GHz)
 > How do I check my DSA is working properly?
 > How do radio amateurs use RIGOL's DSA815? And for what kinds of applications?
 > I just received mine… how can I tell if it's working OK?
 > Can I get help on using complex functions of my instrument?
 > Can I get help with programming my instrument?
 > Will I get a UK phone number for the team who sold to me?
 > How do I achieve the lowest DANL with my spectrum analyser?
 > EMC Precompliance: Testing on a budget
 > How do I measure an RF Bandpass filter
 > How do I connect my instrument via my LAN to UltraSigma PC Software?
 > After receiving my instrument(s), what should I do with my RIGOL Warranty Card?
 > Can I get Rigol firmware updates?
 > When installing Ultra Sigma I get a message PC telling me to install NIVISA / VISA Runtime engine. What am i doing wrong?
 > What about RIGOL battery and portable use? Can you run RIGOL Scopes and Spectrum Analysers from Battery or portable UPS Power Supplies?
 > USB stick / flash drive / memory sticks must fully compliant with USB2.0* standard compliant w/Win7 - Info on good sticks, esp. earlier models:
 > RIGOL 3GHz Spectrum Analyser - Applications insights from RIGOL-UK's customers.
 > Getting started with Rigol PC Software Tools
 > AMK: What do you get with the DSA Advanced Measurement Kit ? (DSA1000-AMK)
 > How do i measure an RF Attenuator?
 > Using a Rigol product key to generate a Rigol software licence code.
 > Rigol PC Software Summary
 > Rigol PC Software Versions
 > Can I get IVI drivers for my Rigol test equipment?