Weird behaviour simply changing the SR
Weird behaviour simply changing the SR
Hi !
I noticed something 'strange' by simply increasing the SR, from 2 to 6, in ZIF mode, dec set to 1.
See the attached captures, all centred on the same frequency.
What happens ?
I noticed something 'strange' by simply increasing the SR, from 2 to 6, in ZIF mode, dec set to 1.
See the attached captures, all centred on the same frequency.
What happens ?
- Attachments
-
- SR set to 2 : normal situation
- SR 2MHz ZIF.JPG (135.57 KiB) Viewed 14093 times
-
- Increasing SR to 3 MHz ...
- SR 3MHz ZIF.JPG (166.8 KiB) Viewed 14093 times
-
- Now SR set to 4 MHz
- SR 4 MHz ZIF.JPG (173.27 KiB) Viewed 14093 times
Reason: No reason
Re: Weird behaviour simply changing the SR
Part 2 :
- Attachments
-
- Back to normal now with SR set to 5 MHz
- SR 5 MHz ZIF.JPG (137.9 KiB) Viewed 14091 times
-
- It also looks good when set to 6 MHz
- SR 6 MHz ZIF.JPG (137.41 KiB) Viewed 14091 times
Reason: No reason
Re: Weird behaviour simply changing the SR
The IF bandwidth can be either 200, 300, 600, 1536, 5000, 6000, 7000 or 8000 kHz
So for sample rates of 2, 3 and 4 MHz, the 1536 kHz IF bandwidth is used, so you will see attenuation of the signal outside of the IF bandwidth. At 5 MHz, the 5 MHz IF bandwidth is used, so that's why it looks "normal" again.
Best regards,
SDRplay Support
So for sample rates of 2, 3 and 4 MHz, the 1536 kHz IF bandwidth is used, so you will see attenuation of the signal outside of the IF bandwidth. At 5 MHz, the 5 MHz IF bandwidth is used, so that's why it looks "normal" again.
Best regards,
SDRplay Support
Reason: No reason
Re: Weird behaviour simply changing the SR
Thanks for the explanation.
Best regards.
Best regards.
Reason: No reason