Thanks dear Glen for info
I figured out some issues concerned my Hackrf sensitivity.
Some broadband local interference seem overloaded it.
I followed the steps listed here
1- Shut down every electrical equipments in my shack
2- USB cable changed, several ferrite beads added over it.
3- laptop ran on battery.
4- Ferrits beads added around the coax near hackrf .
5- Cancelling adapters between hackrf coax and antenna switch N-type connector
fix instead. Yeees I succeeded to receive many satellites with Hackrf.
Here a link to short clip - receiving Amsat AO-86 audio beacon.
https://www.youtube.com/watch?v=L84ZUVkbm78
From: Glen Overby <[email protected]>
To: Nader Omer <[email protected]>
Cc: "[email protected]" <[email protected]>
Sent: Friday, January 15, 2016 6:38 AM
Subject: Re: [Hackrf-dev] Hackrf Rx sensitivity
Yes, I've had some frustrations finding settings for the best sensitivity. On
VHF I've found I get the best sensitivity with the IF gain set to 40db and the
baseband gain set to zero. The baseband gain seems to bring up the noise level
and obliterate signals. The preamp certainly helps but I've been wary of
enabling it (or keeping it enabled) due to the blown preamp stories here.
I put a preamp based on the RFMD SPF 5043 (a board from g4ddk & wa5vjb) in
front of the hackrf but without much success. I did have some good results
with the SPF5043 and a MAR-6, but I also got some oscillations at times. I
continue to experiment with that.
Glen, kc0iyt
On Thu, Jan 14, 2016 at 4:28 PM, Nader Omer via HackRF-dev
<[email protected]> wrote:
Hi all
Any issues about hackrf receiving sensitivity ??
I crank up LAN and Amp to upper limit and still I found it very poor in
sensitivity compare to other SDR devices.!!!
I used HF antenna,Yagi Antenna,vertical antenna.
software SDRSHARP. SDR-RADIO and gqrx.
I'm thinking of front end pre-selector ?? Any suggestions.TU
Nader
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