KC901V/KC901M Firmware Download
KC901V and KC901M are 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.
1. Applicable version
All versions of the publicly available KC901V and KC901M support firmware upgrades.
The maximum supported TF card capacity is 32GB with FAT32 file system. Large capacity TF cards may have compatibility issues, smaller capacity cards (under 4GB) hardly have compatibility issues.
The upgrade packages for the 901V and 901M are the same, and the firmware will automatically recognize the hardware model.
2. ROM Pack Download
Version 1.5.6, released August 6, 2023.
This update mainly maintains the remote control function. If you need to use the remote control function, please make sure to upgrade; if you only use it locally, you can not upgrade.
Fixes: 1. In remote control state, if S21 function is used, functions such as SPEC and S11 can no longer be enabled; 2. In remote control state, part of the calibration data is wrong; 3. In remote control state, if the frequency is lower than 60MHz, the S11 data is abnormal; 4. In remote control state, if S11 is enabled for calibration, part of the data is wrong.
Modification or addition: The return of real-time alarm data is canceled and changed to active query by the upper computer to avoid the alarm interfering with the measurement; the remote operation function of S21 group delay measurement is added. See the latest version of the programming manual for details.
Version 1.5.5, released October 15, 2022.
Fixed the problem that some interface display elements were blocking each other; fixed the problem that the VSWR data content was wrong in teleportation mode.
Version 1.5.2, released July 30, 2021.
Fixed the issue that when the number of scanned points is 3150, there is a certain probability of wrong data in the stored data.
Version 1.5.0, released March 3, 2021.
Improvements: Cable length can be set to negative number; compatible with RF components of version 1.0.8. Problems fixed in this version: The upper computer will return an error once after receiving commands for a long time; the consistency between positive and negative cable length and cable attenuation; S21 Loss mode, when the number of scanning points is greater than 450, the reading file is abnormal; and other minor fixes.
Version 1.4.4, released June 22, 2020.
Fixed the abnormality of user calibration when the circle graph is displayed and the number of points is 3150 points, fixed the problem of crashing when switching to VSWR display mode immediately after inputting the K value in DTF mode, and fixed the problem of saving the screenshot in field strength mode, which existed in all the previous versions, where the number of the screenshot was reduced on the basis of the correct reading.