[OZAPRS] [amsat-bb] AirSpy Mini VS Funcube Dongle

[Andrew Rich]

The fun cube dongle wins hands down on dynamic range and sensitivity what it lacks in bandwidth

I just wish it would work like my airspy mini

Andrew 

Sent from my iPhone

> On 24 Oct 2017, at 5:58 am, Paul Andrews <w2hro.fn20 at gmail.com> wrote:
> 
> AMSAT Community,
> 
> I have the same problem and would really appreciate any information on
> a fix.    I have read about the origin of the DC Offset problem but I
> don't see any way to correct the problem.
> 
> I'm a happy owner of three (3) Funcube Dongles.  One of the best
> values in SDR equipment.
> 
> 73 - Paul - W2HRO
> 
> 
> 
>> On Mon, Oct 23, 2017 at 7:53 AM,  <vk4tec at tech-software.net> wrote:
>> How can I get rid of this DC spike in the Funcube Dongle ?
>> 
>> Andrew
>> 
>> -----Original Message-----
>> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of
>> vk4tec at tech-software.net
>> Sent: Monday, 23 October 2017 9:13 PM
>> To: AMSAT <amsat-bb at amsat.org>
>> Cc: 'Australian APRS Users' <ozaprs at aprs.net.au>
>> Subject: [amsat-bb] AirSpy Mini VS Funcube Dongle
>> 
>> Signal Comparison of AirSpy Mini vs Funcube Dongle PRO+
>> 
>> 
>> 
>> 432.440 MHz
>> 
>> 
>> 
>> AirSpy Mini SDR 3/6 MHz
>> 
>> 
>> 
>> IF = 9
>> 
>> Mixer = Max 15
>> 
>> LNA = Max 15
>> 
>> 
>> 
>> Noise Floor -80 db
>> 
>> Signal Peak -50 db
>> 
>> S/N = 30dB
>> 
>> 
>> 
>> Funcube Dongle Pro + 192 KHz
>> 
>> 
>> 
>> LNA = Yes
>> 
>> Mixer = Yes
>> 
>> IF Gain = 11
>> 
>> 
>> 
>> Noise Floor -80 dB
>> 
>> Signal Peak = -35 dB
>> 
>> S/N = 45 db
>> 
>> 
>> 
>> RTL-SDR Dongle 2 MHz
>> 
>> 
>> 
>> Did not compare at all - Noise Floor -50 dB / Bad S/N
>> 
>> 
>> 
>> HackRF
>> 
>> 
>> 
>> Did not compare - was more a GNUradio Tool
>> 
>> 
>> 
>> The Funcube Dongle was 15 dB better than the AirSpy Mini
>> 
>> 
>> 
>> But remember Fincude SBR is 192 kHz and AirSpy Mini is 3 or 6 MHz
>> 
>> 
>> 
>> Best: Funcube Dongle Pro +
>> 
>> 
>> 
>> Andrew
>> 
>> _______________________________________________
>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available to all
>> interested persons worldwide without requiring membership. Opinions
>> expressed are solely those of the author, and do not reflect the official
>> views of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>> 
>> _______________________________________________
>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership. Opinions expressed
>> are solely those of the author, and do not reflect the official views of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb