Stefan (et al), I did listen this morning on 136.8 to see if I could copy you or any other station, but the results were disappointing: I heard nothing. I have no prior experience with 137 KHz so I h
Hi Stefan, DCF39 is more than 40 dB above the noise, but the problem is that my FT897 only seems to have 40 dB dynamic range without the AGC. (range between the receiver noise floor, and max LF outpu
Hi Minto, you could overcome the dynamic range limitation of the measurement by using an attenuator for the signal measurement. 1. tune to the center of the LF band, with DCF39 outside the passband.
Did I write manual AGC ? Obviously I meant to write manual (IF) gain control. Minto pa3bca -- Ceterum censeo Carthaginem delendam esse From: [email protected] Minto Witteveen Sent: Monday, Au
Hello Minto, Am 07.08.2011 00:10, schrieb Minto Witteveen: Just a question: How do you use speclab to measure the signal level of for instance DCF39 AND the noisefloor.. By measuring both and compari
Hello Stefan, I really cannot explain why I did not hear anything. But I will keep trying , and improve receive conditions where possible. I did eliminate two QRM generators, a Philips fluorescent la
Hi Stefan, Roelof, Albert, Markus. Thanks for the info. So between 50 dB en 90 dB Thats quite a range. I _think_ it is more than 50 dB, but most certainly not in the 80-90 dB range, alas. Not with th
Hi Stefan, Let me try to explain a bit better what I have done. When I disable the AGC of the FT897 I need to dial-down the manual AGC in order to avoid overloading the IF AND the AF sections when tu
Hello Minto, I just measured DCF39's signal to noise ratio. It is 85 dB in a bandwidth of 1 Hz in Middelburg. So, you may have an idea what to expect. 73, Roelof, pa0rdt
Hi Minto, Am 07.08.2011 22:57, schrieb Minto Witteveen: Hi Stefan, DCF39 is more than 40 dB above the noise, but the problem is that my FT897 only seems to have 40 dB dynamic range without the AGC. (
Hi Stefan, I noticed I wrote ALC, but obviously this must be AGC. I installed Speclab, and did some tests with the 879. With the ACG off I adjusted the gain just to the threshold of (audible) distort
Hello Minto, Nice to read about your progress! Am 07.08.2011 18:06, schrieb Minto Witteveen: Hi Stefan, I noticed I wrote ALC, but obviously this must be AGC. I installed Speclab, and did some tests
Hello Minto, Am 05.08.2011 23:59, schrieb Minto Witteveen: Stefan (et al), I did listen this morning on 136.8 to see if I could copy you or any other station, but the results were disappointing: I he
