DiSEqC Monitor

DiSEqC™ (Digital Satellite Equipment Control) is a way of controlling satellite receiver equipment and accessories. Many problems that occur in input switching systems can be tracked down to failures in DiSEqC communications with the receiver. This DiSEqC monitor allows commands on the control bus to be analysed as a first step on the way to finding the fault.

The value of C5 was originally 2.2nF according to the Eutelssat specs and worked okay with Nokia sets. Later it was discovered that 220 pF was required for Dreambox sets -- this value also worked with the Nokia 9500 set. Give it a try!
We're sorry this additional information arrived too late for inclusion in the article.

EE Labs 02 November 2006