At 10 kHz the attenuation is 8 dB, so the stated noise figure of 27 dB at 9 kHz complies with this. Exactly. And the qst-quoted MDS of -127dBm @ 2.4kHz (surley somewhere >1MHz ) which means af NF of
Dear Jim, The figures Clemens quotes for the Perseus RX are curious < PERSEUS has a rf-isolating transformer at the input, which has a low frequncy roll off. At 10 kHz the attenuation is 8 dB, so the
Dear Clemens, Markus, Yes, what Markus wrote is exactly what I mean... In general, the SNR does depend on the source impedance. Also, the overall power gain of the preamp/receiver depends on the degr
Markus,Jim, the point of Jim was (i believe) to take a dummy with approximately the same impedance of the antenna (at the rx input) to have a more exact reference for comparison of rx or preamp noise
