I see anomalies in the plots if using more than a value of '1' in the "Segments" cell. See attached image:
this is a 320 MHz Low Pass Filter and the protrusion around 500 MHz on the gain plot is one of the anomalies.
Is NanoVNA-Saver only intended to work with certain firmware versions? That could be my issue.
Version info:
ch> version
0.2.2
ch> info
Kernel: 4.0.0
Compiler: GCC 8.2.1 20181213 (release) [gcc-8-branch revision 267074]
Architecture: ARMv6-M
Core Variant: Cortex-M0
Port Info: Preemption through NMI
Platform: STM32F072xB Entry Level Medium Density devices
Board: NanoVNA
Build time: Sep 29 2019 - 02:24:31