Inspire VLF-3, Руководство по сборке

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VLF-3 Rev #1C Assembly Instructions
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clockwise (lowest level) and then turn the “receiver power” on. Gradually turn up the
“data level” in the clockwise direction with your finger touching the “ant” connector. You
should hear a strong hum coming out of your computer speakers. If you hear a hum
that increases in volume as you turn up the “data level”, then everything is working up to
the point just before the audio amplifier section. If you do not have hum coming to the
computer, even at the full “data level” setting, then there is a problem with the frontend
of the VLF receiver and you’ll need next to perform diagnostics there.
4. If the computer is being delivered a strong hum, then you should hear that on
headphones connected to the “audio out”. I suggest always starting with the volume
control (“audio level” in this case) turned all the way down and only increasing it while
monitoring the output. If you heard the hum on the computer, but do not hear it in the
headphones, then something is wrong with the last amplifier section and you will next
need to perform diagnostics there.
5. Nearly all faults will have been corrected by carefully inspecting for solder bridges
and missed solder connections. The next most common error is in the wiring from the
PCB to the external connections. The previous two steps can help to narrow down
where to look for problems after that. Perhaps you’ve missed one of the common
errors and by narrowing where you need to look you will find something you’ve missed
before. Otherwise diagnostics become a matter of tracing signals through the various
components to see if a signal applied to the antenna is getting from one component to
the next the way it is supposed to. That can be done with limited test equipment,
however a signal generator and oscilloscope make it much easier. But I don’t
recommend you go out and buy new test equipment. Contact INSPIRE first. Perhaps
the next step is to send it back for repair.
Postscript
Any part shortages or discrepancies should be reported to The INSPIRE Project:
CustomerService@TheINSPIREProject.org
Any corrections, suggestions or recommendations for improvement of the assembly
instructions would also be appreciated.
If you would like to submit an article on field observations to The INSPIRE Journal,
please email:
Editor@TheINSPIREProject.org
Thank you for your participation and support of The INSPIRE Project!