Hi Laurie and the group,
Fortunately, there are alternatives to these new shiny
TFT-colour-display-equipped "top class" radios:
For weak signal modes, use software defined radios like SDR-IQ, Perseus,
etc to name just a few.
They are basically digital downconverters with internal high-performance
A/D converter, and interface to the USB port directly (no soundcard
required).
RF and IF gain are selectable (via control software) but not automatic,
so ideally suited for weak signal modes.
I think Brian CT1DRP uses the SDR-IQ with the original software, but
other weak-signal processing software like Alberto's Winrad, or DL4YHF's
Spectrum Lab, support these radio too.
Best regards,
Wolf .
lawrence mayhead schrieb:
This could be a backward step for those of us using Argo/ Spectran etc
to look for
weak signals. All DSP receivers including the Icom 756 Pro 111 are not
able to turn
off the AGC. Hence when looking in a small bandwith usually much
smaller than the
DSP or even conventional filter bandwiths a strong signal within this
larger b/w will
de-sensitise the receiver to the extent that the weak signal will be
lost. This was the
problem I had in the early days of TA working.
73 Laurie.
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