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FAQ
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1. What is the database?
It is an xml file of the rig type, selected options and closedown appearance of NaP3 that restores those closedown
condition on the next
startup. It is kept in a normally hidden OS 'Users' folder. For Windows 7 this is Users/YOUR_A/C_NAME/AppData/Roaming/NaP3.
Sometimes there are changes in NaP3 that alter the default database structure and it needs a new default. This
last happened after version
2.2.4.2.
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2. Why can I can see signals I cannot hear or tune in to?
NaP3 only sees what it is fed. You may be seeing pickup on connecting or power leads, spurious signals from
your rig or both. All this will be
worse if the fft number is set high. The big values are best for looking into narrow bands.
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3. Why does it use a high % of my cpu?
You probably have a single core processor. No matter how fast, a single core will struggle with everything going
on in NaP3 - the system it
was written on has an i7 processor. A USB sound card adds extra demand on the processor, as does enabling any of the NaP3 receiver
controls.
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4. Why does NaP3 usually need a sound card for its input?
This is the easiest, cheapest way to convert the analogue I/Q signal to digital for processing. It is inevitably
a compromise.
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5. Why am I having trouble with other programs that I have running in conjunction with NaP3?
This sometimes happens if a 'buffer' program such as LP Bridge is not used. Using that, the author can have
a logger, CW Skimmer and two
instances of MMTTY running simultaneously. If NaP3 runs standalone on your system the interfacing of other software may need
reassessing.
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6. It does not work properly when I use it with "Magic DX SuperMagnet Professional" (or some other software package).
Does NaP3 work standalone with your rig? If it does, it is not a NaP3 problem.
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7. Why won't it work for me?
Most often caused by a sound card driver being unhappy with the OS and/or incorrect hardware configuration.
Check with the LP Pan Yahoo!
group for the experience of others with a similar configuration.
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8. Why is there a spike in the middle of the display?
This is usually caused by poor sound card design or poor isolation at the sound card input. Good interfaces like LP-Pan have wideband
isolation transformers. The content of the spike is a mixture of stuff, from a 1/f component which is big towards dc (~0f) to ground loops.
Wide, flat displays with no spike are to be treasured above pearls but the 'DC Block' option in the Input tab should help some.
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9. Why does the noise floor turn up/down at either end of the display?
Wide, flat displays are few. This is usually caused by limits to the sound card response. Using it for I/Q input
is not the same as plain vanilla
audio. Possibly also caused by limited IF bandwidth in the connected rig.
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10. Why am I having trouble with my "SuperMega mk16 192kHz HiFi Lo-Noise 8.1" laptop sound
input?
Is it really a stereo input? Even if it is not a mono mic input, not all advertised sound card performance
claims are true...
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11. Why is the detail and refresh rate so good at narrow spans?
Because audio 'baseband ' is being processed, rather than sampling and processing the IF directly.
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12. When will NaP3 serve cold beer and fries?
NaP3 is improved and rebuilt gradually, Perpetual Motion and FTL travel will come first.
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