If you oversample then you can do antialias filtering in DSP.
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This was a marketing article (and it shows) - so Marketing managers like Jackson, like to throw in words like ârobustâ if they can! And they play with technical facts only to the level where it sells more radios.
You are 100% correct, until this radio goes through some verifiable, repeatable tests we wonât know how good or bad it is âfor the priceâ.
Itâs a shame but it doesnât look like any dealers at Friedrichshafen will have it there (not that I intend to buy another radio).
73 Ed.
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Nevertheless you have to ensure that there is no significant signal content above fs/2. Signals above n*fs/2 (with n>1 to infinity) will be folded back into the range 0-fs/2.
Additionally, there is the problem that the field strength of a transmitter at a frequency out of your range of interest determines the AGC range. When you digitize at 250 MHz from 0 to 110 MHz, you can do with a simple filter, but the 100kW FM transmitter on 90 MHz will push those puny 5W on 3.5 MHz signals into the noise floor.
73 de Martin / HB9GVW
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Thatâs what I always say until I press the âcheckoutâ button.
SCNR
73 de Martin / HB9GVW
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The radio seems too good and fragile to use in the mountainsâŚ! Just looking at it makes me worried about that huge displayâŚ
Gomes CT1HIX
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that has to be very bright in the sunđ
73 Chris
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Iâm sure itâs a good transceiver!
I know transceivers shouldnât fall but my ft817 has already survived two fallsâŚ
Okay, Iâm clumsy!
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Theyâre also reasonbly easy to repair when they do get damaged or something goes pop.
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