SpectraPlus Spectrum Analyzer review - diyAudio
Go Back   Home > Forums > Design & Build > Software Tools
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Software Tools SPICE, PCB CAD, speaker design and measurement software, calculators

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 13th January 2010, 01:39 AM   #1
diyAudio Member
zener_diode's Avatar
Join Date: Nov 2007
Location: Michigan
Default SpectraPlus Spectrum Analyzer review

SpectraPlus is a fairly inexpensive measurement software and if paired with a
good PC Audio Interface, it makes a pretty good setup for measuring audio
circuit performance. I have the full software package and a Digital Audio Labs
interface card. Attached are spectrum plots of the output of the card connected
directly to the input. The program has a utility to generate waveforms and for
calculating the measurements such as THD+N, S/N, IMD, etc. You can download
a free trial to see how easy it is to operate. As for the audio interface card, you
can use any Windows compatible card, but I chose the DAL CarDeluxe. It has
great specs and seems to work quite well.

To get the best performance from this combination of hardware/software, I had
to make the following settings, which took me quite some time to figure out, as
well as some emails to Pioneer Hill Software as well as Digital Audio Labs.

1. The card has balanced input and output and you need to make special
cables if you are connecting to unbalanced circuits.
Input Cable: Use a balanced cable with Hot, Cold and Ground. Connect the
Hot to the signal conductor at the unbalanced end. Connect the Cold to
the ground conductor at the unbalanced end. Leave the shield floating at
the unbalanced end.
Output Cable: Use a balanced cable with Hot, Cold and Ground. Connect
the Hot to the signal conductor at the unbalanced end. Connect the shield
to the ground conductor at the unbalanced end. Leave the Cold floating.

2. The card has settings for sample rate and bit depth. Don't use the automatic
settings. They don't perform as well, probably due to processing in the Windows
operating system. Instead, use 96KHz sample rate and 16-bit depth.

3. SpectraPlus has many different settings for sample rate and bit depth as
well as stereo/mono. Use 96KHz sample rate and 24-bit depth and select "Stereo".
You can set the display to only show one channel, if that is all you need.

One last note: the above cable configuration for the input will present a 10k
load to the circuit that you are testing.


SpectraPlus: SpectraPLUS - Audio Spectrum Analyzer
Digital Audio Labs: Digital Audio Labs Home Page

Happy Testing!
Attached Files
File Type: pdf Spectrum_Analog.pdf (48.8 KB, 108 views)
File Type: pdf Spectrum_Digital.pdf (48.8 KB, 58 views)
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Spectrum Analyzer Overd0se Parts 3 3rd June 2011 04:27 PM
Suggestions for used spectrum analyzer? ezkcdude Digital Source 4 21st June 2007 09:24 PM
Homebrew Spectrum Analyzer Duo Everything Else 44 14th March 2007 08:44 PM
Possible Spectrum Analyzer Project? Xlrator Digital Source 7 25th April 2006 05:30 AM
audio spectrum analyzer norvbul Solid State 6 6th March 2006 12:06 AM

New To Site? Need Help?

All times are GMT. The time now is 03:25 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2