When you sell to only one customer, there isn't a need to publish the specs.
"According to Sonora" should raise a red flag.
Thanks, I figured the specs probably hadn't been released but I was curious. I assume Sonora either got their figures from Directv or measured them....why are you suspicious about their data?
The only thing that can be "played with" are the stripline lengths inside, but even these can't vary that much.
Slope compensation is fairly lossy, by attenuating the lower end more than the upper end..
So in the absence of other requirements, if you wanted to design a splitter that compensated for slope, you'd take a regular splitter and add additional attenuation to the lower frequencies?
I believe you've mentioned in the past that the green label / MRV approved splitters are specifically designed to have reduced port to port isolation in the DECA frequency range. If that's the case, would such a design have any effect on the insertion loss in lower frequency ranges?
Holland has some splitters designed for SWM/MRV in commercial/MDU environments they say they worked closely with Directv to design, which also have slightly higher losses at lower frequencies. In this case the specs also state the port to port isolation, shown as 19 db from 4-475 MHz in their 8 way splitter, 20 db from 950-1820 MHz, 15db from 1820-2150 MHz, but only 10db from 475-625 MHz. Exactly what you'd want in a splitter designed for MRV. They state 12db of loss in the SWM range of 950-1820 MHz, but 16db in the unimportant 4-475 MHz range.
I'm just trying to understand how SWM splitters and in particular those designed for MRV may differ from a "typical" splitter in their design to accomplish Directv's specific goals for reduced port to port losses in the DECA frequency range.
Edited by slice1900, 10 March 2014 - 04:18 PM.