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g0orx / pihpsdr

Raspberry Pi standalone code for HPSDR (Protocol 1 and Protocol 2)
GNU General Public License v2.0
110 stars 73 forks source link

Sudden jump of the noise floor to the top of the spectrum display #180

Open kihwal opened 1 year ago

kihwal commented 1 year ago

This happens occasionally. When this happens the actual audio output is affected too. E.g. wsjt-x would show a constant high audio input level. Restarting the app or changing the sampling rate from the RX menu restores the receiver function.

I am not sure whether my ANAN-10 (non-E version, running protocol 2) is at fault or the software. It will be of great help if someone can suggest what to look for in pihpsdr. I can add debug statements and inspect some variables.

cosmo1stgen commented 1 year ago

I am also having this issue. It has happened twice both when the sample rates were 384 or greater. Last time it happened with both receivers open I was transmitting on rec1 when returning to receive rec2 noise floor jumped to 10 over closing rec2 and reopening did not resolve it. Rec1 was unchanged. I am not running a pi but a pc on latest linux mint.

cosmo1stgen commented 1 year ago

Also running hermes 16 bit on protocol 2.

dl1ycf commented 1 year ago

I had this problem quite frequently with my Anan-7000 running P2. This is a firmware timing problem. It has been much improved in the latest Orion2 firmware. In the dl1ycf version there is a "RESTART" button which restarts the protocol, and this was introduced exactly to recover from such situations.