Hi Prog Sorry, I didn't understand the answer in relation to what I'm seeing. It may be something to do with the defined bandwidth at the server end. I was trying to constrain the bandwidth to

How will then the trained professionals explain this: BDR= P1dB - Noise floor P1dB=IP3-10db P1dB=15-10 = +5dBm BDR=+5- (-140) BDR= 145dB This is a big difference, 110db or 113dB over to 145dB ? Adam

I have my trained professional hat and aged tattered and torn tee-shirt among the clothing I am metaphorically wearing at the moment. {^_-}

The AGC's are disabled for the BDR tests. You don't want to disable them in real world use. These stunts were done by trained professionals, don't try this at home ;-)

Is their feedback to the program running it for the current AGC setting so that metering can be accurate in a spectrum analyzer application? {^_^}

Measured with a weak signal at -115 dBm and a blocker 20kHz away. The blocker is increased until the weak signal decreased by 1 dB - and we are still conservative here. The datasheet says 113 dBm

Seems that protocol is not public but will be implemented in Gqrx. As it is an opensource project we could inspect the client implementation to use it to other projetcs. 73's Evariste

Can somebody explain how this number is calculated or measured? BDR 110dB? The method used ? thanks Adam

Good morning, can I put my server in the list at this address? https://airspy.com/spy-servers/ Owner: Andrea OTTAVIANI IK0MMI Location: Perugia URL: sdr://ik0mmi.ddns.net/ Radio: Airspy R2 Band.

Incidentally - most adjustable gain amplifiers lose dynamic range as the gain is reduced. One exception is a fixed gain amplifier with an attenuator in the output. {o.o}

If loss is 2 dB the gain of the preamp should be somewhat below 10 dB. Actually 6 dB should be adequate bordering on too much. Even so you lose some dynamic range within the hard limit of the number

As jdow would tell you, you want the preamp as near the antenna as possible, within reason. Then if you use an attenuator, put it at the receiver end of the feedline, so it need not be waterproof,

Hi JEREMY, streams nicely to western Canada, using about 42K bytes/sec, on sdrsharp 1620 running on antergos linux under mono (uses about 20% of each of 2 cores on a 3GHz core 2 duo). Great audio, no

Buy one. See know much CPU and IO capacity it consumes. Then adjust accordingly. One AirSpy consumes one whole USB 2.0 root hub. So without added USB boards you're not even going to run your keyboard

Works fine in France too. 36kB, no lag, perfect sound. Animations GRATUITES pour vos emails Cliquez ici !

Agreed, but I would only use a LNA if your loss is > 2dB and, as you say very low NF and adjustable (low) gain, purely to overcome the cable loss. Simon Brown,

{o.o}

Sounds good here in New Jersey! Listening to the 444.950 repeater. Jeff K2SDR

Any band if the preamp is located at the receiver. And if it is mounted at the antenna with a long feedline it will be bad on any band on which the gain of the LNA 5000 is more than about 3dB to 4dB

Great work from the airspy team as always. One question though. Spyserver of course plays very nice with sdr# but are there other client libraries floating around (python preferred)? Failed to find