L26T quality of the PPS

IoT Modules GNSS Module
1

We use the PSTMPPSDATA message to understand the quality of the PPS. The frequency in <PPS_ClockFreq> is about 26 MHz. This means that the clock period is about 38 ns. In the field we see values from 0 to 16 ns.
The questions are as follows:

  1. What is the discreteness of PPS generation?
  2. Can we use the value to adjust the time of receiving the PPS to reduce the quantization error? How should we use the value?
3

The histogram of “QuantizationError” field for 14000 seconds length session:

image
image679×549 19.1 KB

any tips?
anything to clarify?

4

Hi Chemarov Pavel,

The 26MHz frequency you mentioned should be the TCXO clock frequency, which is the second to the last parameter.

Did you test in an environment with significant temperature fluctuations?
Did your module get position fixed?

Best regards