This page will be a source for information on a spectrum
analyzer homebrew project. While surfing on the internet, I have gotten quite frustrated
about the lack of useful data. ( For whatever reason ). I like to provide as complete an information package
for those who want to homebrew a simple Spectrum Analyzer by using one ot more
TV ( CATV ) tuners as a frontends.
At this point my analyzer will be based upon TV tuners as frontend. Starting point was the "Poor Man's Spectrum Analyzer design. Also the K2BLA's "An Inexpensive Spectrum Analyzer for the Radio Amateur" will provide idea's. ( QST Nov 1985 ) At the bottom of the page are more references.
My main problem is to find a suitable set of CATV tuners plus documentation and spec's.
Finally learned the difference between a socalled 125 channel and a 181 channel tuner. No difference in frequency coverage!
The newer tuners as used for KU band downlink receivers have an IF ot 479.5 MHz and cover 1.4 - 2,2 GHz as the older tuners have IF outputs in the 45 - 60 MHz region ( channel 3 - 4 ).
At this point the design will be a conventional one with scanning from a ramp generator and manual adjustment of the center frequency. No provisions are planned for computer interfacing. I expect problems with a non linear freq. scale though.
As soon as results with the CATV tuner are observed, a decision will be made to proceed or go with a moreconventional SA design approach. I have gotten from more then one amateur the advice to forget about this approach and build a frontend using regular available components ( such as Mini Circuits ) or Wideband and Low Noise VCO . Time will tell....
Your contributions to this collection and constructive comments are welcomed.
This is a Amateur radio project.
As the TV tuners show quite a variety of needed voltages to operate, we have started
with a power supply with the following output voltages:
+12, -12, +5, +20 adjustable, and +30 V for the tuning voltage.
I recieved an early version of a poor man's spectrum analyzer from WB2BQR as a test bed.
A Simple Spectrum Anlyzer. ( The late G4FXW )
Benelux QRP on SA
Another idea from Japan.
SA for FM band.
Washington University, project.
UHF tuner, 470 - 890 MHz )
Spectrum analyzer with computer readout
Automatic Noise Figure Measurements with a Spectrum Analyzer.
Tracking generator by KE5FX.
Sweep and Bandwidth Considerations for Spectrum Analyzers.
I6YPK with his HP141.
HP141 Repair and Comments by WB8ZDF.
Correlation Spectrum Analyzer.
A Tutorial on Sensitivity Definitions.
RF Related Conversions.
Power / Voltage converter in JAVA
More of the same. Availability?
Apple TV Card??
Look under "New ATI Wonder boasts TV on a PC/
Useful or not?
PC-TV Tuner cards from A to Z.
List server for TV cards.
An example of a tuner with detailed info.
Tuner data from jp.
Tuners for ATV usage.
New CMOS tunerSee Dec 6, 1999
IF Band Filering of AM TV signals.
Universal Satallite receiver chip, IF = 479.5 MHz.
479.5 MHz IF issues.
More Technical issues around the 479.5 Mhz IF issue.
Tuner hardware specs.
Utah ATV pages.
S53MV on VCO's etc.