Re: No Receive on 2 Meters using 0db mode and Antenna 1 #elad #fdm-duo #fdm-s2

Mark Gottlieb <kk2l@...>

Good Morning All,

I did make the necessary adjustments in the software and tuned up to 145.390, which happens to be a strong repeater in this area, and I did not hear anything. I was listening in FM. I think I heard the repeater being keyed up but no other audio. Is it a narrow pass band at that frequency for the ELAD?



-----Original Message-----
From: <> On Behalf Of Neil Smith G4DBN
Sent: Tuesday, January 14, 2020 7:02 PM
Subject: Re: [EladSDR] No Receive on 2 Meters using 0db mode and Antenna 1 #elad #fdm-duo #fdm-s2

[Edited Message Follows]

Hi Mike and Mark, remember that the effective noise figure of the DUO at 144MHz is *very* poor because of the maths with a sampling rate of 122.88MHz, but you should be able to hear a strong repeater. Other than setting the LPF off and setting TX OUT to 0dBm and switching to Antenna 1, and turning off the attenautor, I don't think there is anything else to do. I just tried on my spare DUO and I can hear a locally-generated CW or AM signal on the FM broadcast band, and a weak NBFM signal from my signal generator with those settings.

You can't receive wideband FM in standalone though, that needs SW2, and you have to amend the UnlockDUOt setting in the config files so SW2 will tune past 54MHz.

Neil G4DBN

On 14/01/2020 23:31, Mark Gottlieb wrote:
I'm glad someone brought this up. I will be testing noise floor
adjacent to solar installation to test viability of putting solar
panels at our club. We have some big EME operators and they would not
appreciate to have that clarified.

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