Reply to thread

Message

<blockquote data-quote="Channel Hopper" data-source="post: 931198" data-attributes="member: 175144">There used to be a voltage output on the rear of analogue receivers that could be used for tracking satellites in inclined orbits. I'm certain that digital tuners also have a pin out on them for the same purpose, but whether this is utilised by the PCB once it gets sent on to the demodulator is probably dependent on the age, device specifics , the manufacturer and the original cost parameters necessitating its manufacture. In earlier DVB-S tuner circuitry - VST -&nbsp; there would have been a pin out which had the marking 'GC' gain control or possibly 'IFAGC' though I last saw this used on an Echostar receiver in the early 00's. More modern stuff has a phase lock loop to keep everything stable and may or may not require anything to be delivered to the outside world from within the can. In order to save a few pennies the manufacturer would not need to put in any external conection on the circuit design.The human interface which relates to the signal 'strength/quality' in modern receivers are most likely a product of data processing within the I2c bus and with no outside connection, I would suggest a split from the LNB with a secondary (and older) tuner which has a pin out, the cheapest method being a squarker meter with a tap from the first filter stage.</blockquote>

[QUOTE="Channel Hopper, post: 931198, member: 175144"] There used to be a voltage output on the rear of analogue receivers that could be used for tracking satellites in inclined orbits. I'm certain that digital tuners also have a pin out on them for the same purpose, but whether this is utilised by the PCB once it gets sent on to the demodulator is probably dependent on the age, device specifics , the manufacturer and the original cost parameters necessitating its manufacture. In earlier DVB-S tuner circuitry - VST - there would have been a pin out which had the marking 'GC' gain control or possibly 'IFAGC' though I last saw this used on an Echostar receiver in the early 00's. More modern stuff has a phase lock loop to keep everything stable and may or may not require anything to be delivered to the outside world from within the can. In order to save a few pennies the manufacturer would not need to put in any external conection on the circuit design. The human interface which relates to the signal 'strength/quality' in modern receivers are most likely a product of data processing within the I2c bus and with no outside connection, I would suggest a split from the LNB with a secondary (and older) tuner which has a pin out, the cheapest method being a squarker meter with a tap from the first filter stage. [/QUOTE]

Verification