The diode ring mixers have stuff going in and out of all three ports,
terminating all three ports into 50 ohm pads helps to dampen undesirable products.
But if you want a 6dB pad between the si5351 and a 7dBm level mixer, you had best have an amp in there too.
The si5351 can't drive hard enough at 7+6=13dBm? for this to work very well.?
See posts 33902 35206, 46122
Jerry
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On Sat, Aug 11, 2018 at 01:11 PM, Henning Weddig wrote:
When looking on the schematic of the ?BITX I am wondering why the LO inputs of the mixers must have a 6 dB attenautor.? Is there a reasonable explanation?
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