Where can I find the signal detection point on a SatFinder WS-6903?

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Discussion Overview

The discussion focuses on locating the signal detection point on a SatFinder WS-6903 device, particularly in the context of a radiotelescope application. Participants explore the technical challenges involved in accessing the detected signal before it is digitized and displayed.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks to identify the detected signal point on the PCB of the SatFinder WS-6903 for radiotelescope use.
  • Another participant expresses skepticism about the feasibility of tapping off a signal at the required frequencies and inquires about alternative communication methods with the device's microprocessor.
  • A different participant shares prior experience with a similar device, noting the complexity of the WS-6903 due to its SMD components and suggests that the signal processing chain typically involves filtering, voltage doubling, amplification, and display.
  • One participant clarifies that they are specifically interested in the amplitude of the detected signal, likening it to automatic gain control (AGC), and mentions the difficulty of locating the signal point due to the presence of numerous components.

Areas of Agreement / Disagreement

Participants express varying levels of confidence regarding the ability to access the signal point, with some skepticism about the complexity of the device and the challenges posed by its design. No consensus is reached on the best approach to locate the signal.

Contextual Notes

The discussion highlights limitations related to the complexity of the device's circuitry, the presence of SMD components, and the potential lack of available schematics, which may hinder participants' ability to find the desired signal point.

Ravaner
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Hello. In a radiotelescope application I need to get the detected signal in a SatFinder WS-6903. probably just before digitizing and display. If someone owns the schematics or knows where is this point on PCB ...
 
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Ravaner said:
Hello. In a radiotelescope application I need to get the detected signal in a SatFinder WS-6903. probably just before digitizing and display. If someone owns the schematics or knows where is this point on PCB ...

At those frequencies, I doubt there is a point where you can easily tap off a signal. Do they make any versions with a USB interface or some other way to communicate with the microprocessor inside?
 
Hi. In fact I did that job already on more classical sat finder with analog display (µ amp meter) . This one is more complicated, with many smd and double face components. Finally it's always the same chain :filtering, voltage doubling (Schottky diodes), amplification, display. I really need an experienced reply for this device, or better the schematics.
 
I need to get the detected signal...

are you after the signal content or just its amplitude as in AGC ?
 
Hi. I only need its amplitude, as I wrote it's a simple detection (AGC is a good example). Problem is that on my new sat finder WS-6903 there are to many components (µcontroller ...) and to find the place of this signal is not an easy game to play
 

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