What would be the bandwidth of a good crystal lattice band-pass filter for weather facsimile HF reception?

For weather facsimile HF reception, a bandwidth of 1 kHz at -6 dB is suitable to effectively accommodate the transmission characteristics of the data. Weather facsimile transmissions typically use frequencies that incorporate a specific bandwidth to accurately convey image data, which includes charts and maps. A bandwidth of 1 kHz allows for the necessary fidelity in receiving the nuances of such image data while minimizing interference from adjacent channels.

The selection of this bandwidth at -6 dB is significant, as it is a common measure to determine the point at which the filter begins to significantly attenuate signals. This allows for effective filtering of unwanted noise and signals outside of the desired frequency range while ensuring that the essential components of the weather facsimile transmission are retained.

Other bandwidth values, while capable of filtering signals, either provide too narrow a range (potentially compromising the quality of reception) or too wide a range (which could let in more noise and unwanted signals). Therefore, a bandwidth of 1 kHz at -6 dB is optimal for the purpose of receiving clear and accurate weather facsimiles.