MATSUTEC HA-102 - frequency issue on may be all older versions - firmware issue.

Hi there, so this is my new AIS device for my sailboat, the MATSUTEC HA-102. But sadly it has an issue with accuracy of the transmitted frequency. It is cca 2,5 kHz lower from main frequency (161.975kHz and 162.025kHz). Movies shows many signals of other ships (little bit farer a way), which transmitting on accurate frequencies. Stronger signal comes from my AIS transponder - and you can see difference. Due to new restrictions at my work (we must be at home on HOME OFFICE from today =o/) I am not able to check and measure the frequency exactly - frequency counter and memory osciloscope are at my work. I have older type of the counter at home only, without any memory or trigger functions for "catching" of that short transmitting on that. MATSUTEC HA-102 - frequency issue which is may be on all older versions - firmware issue. Ask developers for the newer firmware - reprogramming is easy for guys which is familiar with PC programming