In a message on Tuesday 09-05-16 Tony Langdon said to Holger Granholm:

Hi Tony,

 HG> So, finally it all depends upon from which viewpoint you look at it.

TL> No, it's simple.  If the output frequency is lower than the input
TL> (e.g. 1296 MHz in, 28 MHz out), then it's a downconverter.  If the
TL> output frequency is higher than the input frequency (e.g. 136 kHz to
TL> 3.5 MHz), then it's an upconverter.

Still simpler it is to leave out the up- or down-, and just name it a
converter.

TL> That rule works whether you're transmitting or receiving.

In the case of conversion to from a frequency, a transverter does both.
My Tokyo Hy-Power VHF-HF transverter does both.

It converts a HF amateur band to 144 MHz when receiving, and a 144 MHz
transmitting signal to a HF amateur band, 3.5, 7, 14, 21 or 28 MHz on
transmit.


Have a nice day,

Holger

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