DL1GNM going to be QRV soon
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I've got my SG-Labs transverter and it's working well. With 2 Watt + 1dB RG142 cable loss I'm a bit above the CW-beacon level. I use it with GPSDO.
"Door open".
The LNB is modified and has now an external LO (GPSDO from Leo Bodnar), see here: Twin LNB HD-BP2 with external LO.
My GPSDO settings: 27 MHz & 10 MHz
Link to a Triplexer.
On 432MHz I use as exciter a FT-100 or an old analog IC402 from the 70ties (no PLL, no TCXO and drifting a bit
).My NB setup is complete so far.
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Just a note: triplexer = diplexer + DC.
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Finally the transponder noise of the NB transponder:
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I've measured (and tuned a bit) two of my POTY feeds.
With N-connector and MACOM N-male-SMA-female adapter
With SMA-connector, a dielectric lens is used for 10 GHz
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pardon the question, but why do the two measurements differ so vastly? It is certainly fine for 2.4g but I don't understand the rest of the behaviour. Do you have pictures of the two setups?
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pardon the question, but why do the two measurements differ so vastly? It is certainly fine for 2.4g but I don't understand the rest of the behaviour. Do you have pictures of the two setups?
Achim, my suspicion is that the adapter "MACOM N-male-SMA-female" not present in the circuit during the calibration phase has distorted the measurements.
Mike, DL1GNM will be able to clarify the matter better.
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Just moved around the Smith chart due to the different line length I think.
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Ah, that explains it and is actually very reasonable. Thanks for the solution!
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Mike is right.
With N-connector, N-N male-male+N-N female-female and MACOM N-male-SMA-female adapter
You see the additional delay now very well.
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Mike is right.
This is unusual.
