[Elecraft] KX3 I/Q out span

[DF5RF]

Thanks Matt, that fully answers my question.

Anybody out there who used that feature already? I'm interested in 
comparing this to solutions like K3+LP-PAN.

tnx es 73
Gernot
DF5RF

Am 07.06.2012 23:42, schrieb Matt Maguire:
> The I/Q bandwidth is discussed in the "SDR Applications" section of 
> the manual. I quote:
>
>  *
>
>     The RX I/Q outputs from a receiver are not “flat” over an infinite
>     frequency range; the signal-conversion process results in some
>     slope (decrease in gain) as you move farther from the center
>     frequency. In the case of the KX3, the signal will be reduced by
>     about 2.5 dB at +/- 24 kHz, 4 dB at +/- 48 kHz, and 7 dB at +/- 96
>     kHz. The spectrum amplitude on the display, including the apparent
>     noise floor of the receiver, will “roll off” by these amounts.
>
> 73, Matt VK2ACL
>
> On 08/06/2012, at 6:49 AM, DF5RF wrote:
>
>> The KX3 seems to have direct I/Q outputs to the sound card - which
>> sounds really attractive to me.
>> The manual says the span depends on the sound card sampling rate, like
>> 48/96/192kHz. But it does not tell what kind of band width one can 
>> expect.
>> As I read further, there seems to be a 15kHz limitation imposed by a
>> default roofing filter, and this will go narrow automatically under
>> certain conditions.
>> Again, what kind of span can I expect, and will it depend on any filter
>> settings or not?
>> Thanks and 73
>> Gernot
>> DF5RF
>> K2 #2328
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