(c) 2007-2013 Microtelecom s.r.l. - Pavia di Udine, Italy
All Rights Reserved

All the pictures, the photos and text in this site is property of Microtelecom s.r.l. or licensed to it and only to it. If you copy, manipulate, publish in any form the material here presented you are infringing author's copyrights.
Microtelecom reserves the right to pursue unauthorized users of the content of this site. If you violate our intellectual property you may be liable for: actual damages, loss of income, and profits you derive from the use of the content of this site.
Click to enlarge
Click to enlarge

1) Download the test file amrej15580.wav (22 MB) and play it with the Perseus 1.0g beta version.

2) Tune to 15580 kHz (AM or SAM demodulator) and select your preferred IF filter/PBT configuration to get out the best of the strongly interfered VoA signal. As it can be heard there's nothing a IF filter itself can do to suppress the interfererence at 15575 kHz, a signal which has been synthesized with an Agilent 33250A arbitrary waveform generator and coupled to the receiver input. The 15575 kHz interference overlaps partially with both the sidebands of the signal we are trying to hear (VoA).
At 15585 there's another AM splatter, less sever than the first, but it is actually affected by multipath propagation and, as you will discover later making your own tests, can't be suppressed effectively.

The following pictures explain how to use the AM Splatter Rejection function to remove the interferer at 15575 kHz. Due to the fact that the interference has been created in lab and it is almost a perfect AM signal, a virtually perfect interference suppression is obtained.

Nico - IV3NWV

Click to enlarge