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20 sie 2016 · The purpose of signal tracing, or another form of it, signal injection, is to locate the defective stage of a malfunctioning electronic system such as a radio or audio amplifier/guitar amplifier as efficiently as possible.
A Signal Tracer is an amplified crystal receiver sans antenna and tuned circuits. That is, it has no tuning coil and no tuning condenser. It contains a detector, a high gain audio amplifier, output transformer, and speaker. The use of a Signal Tracer for trouble shooting is called Signal Tracing.
18 sty 2021 · Here's an experiment to try: instead of increasing ALC by increasing the input power until the ALC meter reads half scale, decrease the output power setting on the radio. This will cause ALC to reduce the PA drive, so there will be less output power, and thus less IMD.
22 paź 2020 · For a receiver you can use the signal from your antenna and trace the signal path through mixer, high if filter, second mixer, low narrow IF filter. For transmitter you can monitor the generated ssb or cw signal, possibly a mixer for upconversion and through the power amplifier (with appropriate attenuator or by using a simple resistor to sample)
Yes. Detecting a receiver is VERY VERY VERY hard to do. Since it is only an absorber rather than transmitter of RF energy, it requires a signal strength meter to detect a dip in RF energy. It requires a very directional antenna, and circuitry to detect subtle changes in the signal.
1 cze 2012 · This video shows a few ways that you can monitor your ham radio transmitter with an oscilloscope. Look at the RF carrier, the carrier envelope, the amplitude demodulated signal, as well as linearity “trapazoid” patterns (please see below).
Narrowing the passband is the best way to pick out narrowband signals (like CW and narrowband digimodes) from a noisy band. If the filter is set to be wider, the listener can hear signals further away from the center frequency. Imagine listening to broadcast radio on AM 790.
