KC901 J/K/R Firmware Download

KC901K equipped with firmware upgrade function, you only need to deposit the ROM package into the TF (micro SD) card and follow the instructions to complete the upgrade without other settings.

The maximum supported TF card capacity is 32GB with FAT32 file system. Large capacity TF cards may have compatibility issues.

ROM Pack Download

Version 1.0.9 , released Dec 2, 2024.

Supports KC901J/K/R

1, optimize power consumption, add stop and pause function: press Run/Stop button for 0.5 seconds to enter the stop mode, at this time the RF module will be completely powered off to enter the deep power saving mode. In this state KC901x can standby for more than 24 hours. Press Run/Stop button again to re-run. Since the firmware needs to be reloaded when resuming, it needs to wait for about 3.5 s. Pressing Run/Stop briefly will enter the pause mode.
2, add switching between high and low local oscillator for S-parameter measurement in the FUNC menu, this function belongs to the advanced function, users do not need to switch.
3, add sweep delay function in FUNC menu, used to realize low-speed S-parameter measurement.
4, optimize the power consumption of signal source function.

Known issues

The full dual-port calibration algorithm is inaccurate, it is recommended not to use full dual-port calibration for the time being.

Version 1.0.6 , released Nov 15, 2024.

Supports KC901J/K/R
Improve 20% measurement speed
Improve the measurement speed and stability of KCSDI connection
Fixes the problem of wrong measurement phase in some cases (KC901R)
Add SD card insertion prompt
Fix the problem of Marker menu not working properly under DTF measurement.

Known issues
Noise increase during multi-curve measurements in some cases
The STEP parameter display at the top of the UI has a refresh bug and can be ghosted. This can be resolved by re-selecting the measurement mode once in the HOME menu.

Version 1.0.3(BETA) , released Oct 29, 2024. now abandoned

Multi-trace support, improve the measurement speed, this is beta test version, there may be unknown bugs.

Version 0.1.3 , released May 19, 2024.

Add DTF function and fix some bug.