View source for SUP2400 DiSEqC

In order to receive 437 MHz (70cms) DATV on a standard satellite STB, you need to up convert the signal to L band. 

Luckily there is a consumer device called the SUP2400 available in the USA which is used on cable networks to up convert UHF signals to L Band where they are then received on a standard satellite box.  They are available on ebay but only in the US and so are stocked in the [https://batc.org.uk/shop/hardware-and-kits BATC shop].

The SUP2400 was designed to be controlled by the STB using [https://en.wikipedia.org/wiki/DiSEqC Disecq commands] which the STB sent down the co-ax cable connecting the 2 units when frequency up conversion is required.  As we did not originally know the Disecq commands used M0DTS figured out a series of hardware modifications to force the SUP2400 to upconvert the incoming 70cms signal.  These hardware modification are described in CQ-TV 239 and [[SUP2400 mods|available here]].

Ron G7DOE investigated further and designed a small PIC based Diseqc controller as described in CQ-TV 250 which does away with the hardware modifications.
 
Through hole version to make yourself:

[[:File:SUP2400 DiSEqC Thru Hole PARTS.xls]]
[[:File:SUP2400 DiSEqC Thru Hole ETCH.pdf]]

A surface mount version that can be coax powered or externally powered

[[:File:SUP2400 DiSEqC.xls]]

PCB
 
[[:File:SUP2400 DiSEqC top.pdf]]

[[:File:SUP2400 DiSEqC bottom.pdf]]

I have some commercially manufactured PCBs of this type contact G4KLB if you would like one.