# Version Modification Release Notes
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====== Version 16.5.9 Modification Highlights
1. Fixed the issue of consistently low bitrate when connecting monochrome cameras

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====== Version 17.5.1 Modification Highlights
1. Changed VRX factory wireless standard to SRRC (3 frequency points)
2. Fixed the low bitrate issue of monochrome cameras
3. Fixed black screen problem at the start of video playback
4. Updated frequency points for 5W HF **VTX**
5. Optimized frame change performance and logic control for switching between different modes
6. Disabled Channel B transceiving when GT Pro **VTX** enters low-power mode
7. Fixed crash caused by Mavlink deinitialization
8. Optimized wireless throughput performance in fixed mode
9. Canceled the third digit verification during ground unit boot version check

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====== Version 17.5.2 Modification Highlights
1. Fixed inconsistency between millisecond values in recorded SRT files and GUI display
2. Adjusted the display mode of frequency hopping buttons for subsequent expansion of frequency hopping modes
3. Fixed false trigger of weak signal alarm under good signal conditions
6. Added support for new flash memory types
7. Optimized compatibility of Ascent VRX with BandA/C of 5W HF **VTX**
8. Fixed disconnection issue between frequency hopping and fixed frequency modes
11. Fixed reconnection failure after signal disconnection
12. Optimized signal bar level division logic

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====== Version 17.5.3 Modification Highlights
1. Optimized default frequency point selection when VRX is not connected to **VTX**
2. Fixed incorrect last three frequency points of 5W HF **VTX**
3. Fixed frequent random disconnection issue under 10MHz bandwidth

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====== Version 17.5.4 Modification Highlights
1. Updated new BB image to fix insensitive frequency hopping issue

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====== Version 17.5.4 Modification Highlights
1. Fixed slow frequency hopping response issue of Ascent VRX and Ascent GT Pro

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====== Version 17.5.7 Modification Highlights
1. Added BandD / BandE frequency bands
2. Fixed OSD information not refreshing issue
3. Increased maximum transmit power to 2W in SRRC mode

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====== Version 17.5.8 Modification Highlights
1. Fixed GUI crash issue
2. VRX supports serial port commands for power configuration and power status query
