Pure signal and digital modes

[Tony EI7BMB]

Sorry if this is a dumb question , is there any benefit to using a sampler/pure signal on digital modes like Ft8 ?

[w-u-2-o]

Yes, certainly. Anything that improves transmitter linearity is a good thing.

However, not all digital modes will play well with PS on automatic. You can use the Single Cal feature to obtain a PS correction then just let that ride until you change VFO frequency. Transmit two-tone, then use Single Cal repeatedly until you are happy, then let it ride.

[Tony EI7BMB]

Thanks Scott, think I'll get one of those VK samplers

[w9ac]

Sorry if this is a dumb question , is there any benefit to using a sampler/pure signal on digital modes like Ft8 ?

Not when operating most FSK modes like FT8 unless you operate in "Fox" mode where up to five carriers are generated, 60 Hz from each other. Otherwise, FT8 is a single frequency, constant amplitude modulation mode that under typical operation, isn't subject to IMD degradation.

FT8 is used successfully with Class C and Class D amplification. For example, look at the QRP Labs QDX data transmitter specifications. It operates only under Class D modulation.

Paul, W9AC

[Tony EI7BMB]

Thanks for the info Paul .

[w-u-2-o]

The same would not be true for any multi-tone/multi-carrier mode like VARA, WINMOR, PACTOR, MT63 and others.