Mirrors/hackrf
2
0
Fork 0
mirror of https://github.com/greatscottgadgets/hackrf.git synced 2026-03-04 22:46:00 +01:00
Code Issues Packages Projects Releases Wiki Activity

Added troubleshooting section

Samy Kamkar
2018-07-22 18:00:16 -07:00
parent ce896339ac
commit 2d0cb62973
1 changed files with 10 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
FAQ.md

@@ -211,4 +211,13 @@ What is the minimum signal power level that can be detected by HackRF?
This isn't a question that can be answered for a general purpose SDR platform such as HackRF. Any answer would be very specific to a particular application. For example, an answerable question might be: What is the minimum power level in dBm of modulation M at frequency F that can be detected by HackRF One with software S under configuration C at a bit error rate of no more than E%? Changing any of those variables (M, F, S, C, or E) would change the answer to the question. Even a seemingly minor software update might result in a significantly different answer. To learn the exact answer for a specific application, you would have to measure it yourself.
HackRF's concrete specifications include operating frequency range, maximum sample rate, and dynamic range in bits. These specifications can be used to roughly determine the suitability of HackRF for a given application. Testing is required to finely measure performance in an application. Performance can typically be enhanced significantly by selecting an appropriate antenna, external amplifier, and/or external filter for the application.
HackRF's concrete specifications include operating frequency range, maximum sample rate, and dynamic range in bits. These specifications can be used to roughly determine the suitability of HackRF for a given application. Testing is required to finely measure performance in an application. Performance can typically be enhanced significantly by selecting an appropriate antenna, external amplifier, and/or external filter for the application.
## Troubleshooting
### Q:
Why is a known signal at an incorrect frequency, while adjusting the center frequency offsets the incorrect frequency even further or less?
### A:
You are probably using firmware not associated with the CPLD bitstream (firmware). If using the latest git code, first [update the HackRF firmware](../../tree/master/firmware/README), then [install the `host` code](../../tree/master/host/README.md), then [install the CPLD bitstream](../../tree/master/firmware/cpld/README), followed by powering the HackRF down and back up.