Output files from "ubertooth-specan -g -d output.dat" are garbled codes

Steps to reproduce

Install libbtbb-2017-03-R2 and every other software needed in raspberry pi 3 model B+ (I tried to use libbtbb-2018-12-R1, but some commands did not work well, like ubertooth-specan-ui, it would ask for some libs from python, like PySide2 or specan, depends on the version of python I used to run the file, python2 or python3).
With libbtbb-2017-03-R2, ubertooth-specan-ui runs very well. After that, i would like to extract data about spectrum out, so i ran unbertooth-specan -g -d output.dat. I did have an output file in my raspberry pi, but it is always garbled/error/unintelligent codes inside.

Expected behaviour

I would like to see some readable codes inside "output.dat", like running the command ubertooth-specan -G in terminal, timestamp, frequency, RSSI and etc..

Actual behaviour

In "output.dat", i saw garbled/error/unintelligent codes, like "vÔ wÔ xÓ yÔ zÔ {Ö |× }× ~Õ Ô Ö Ö Ò Ó Õ Ô ×"

Version information

Raspbian GNU/Linux 10 (buster)

Ubertooth tools version (ubertooth-rx -V): ubertooth-2018-12-R1

libbtbb version: libbtbb-2017-03-R2

Ubertooth firmware version (ubertooth-util -v): 2018-12-R1 (API:1.06)

If you are reporting a problem that involves third party software (Wireshark/Kismet/etc), please report the version here.

Output

vÔ wÔ xÓ yÔ zÔ {Ö |× }× ~Õ Ô Ö Ö Ò Ó Õ Ô ×

Insert any commandline or build output here

greatscottgadgets / ubertooth