Caution:
1. Transmitter/receiver boot time require 30 seconds and will be able to control after booting, First time
reboot after reset to default will be longer than 30 seconds.
2. Not recommend to work with existing LAN connection to avoid large video, data transmission or
multicast packets to slow down your other LAN devices.
3. Gigabit switching hub muse support IGMP and Jumbo Frame over 8K in order to achieve the best
quality
4. If monitor shows green screen, please check if the switch running under gigabit and IGMP/Jumbo
Frame function enabled.
5. If video not smooth please check if IGMP function enabled or bandwidth of switch closes to maximum.
6. If UTP and SFP connected together the first connected one will get the priority, the other one will
online automatically once another one failed.
7. If Ethernet is not connected may cause unpredictable problem or OSD message error, please connect
to the Ethernet and reboot.
8. Default EDID is 1080p 7.1 audio, you can use Menu function 96 to copy EDID from monitor of RX.
9. If the monitor of RX shows shortly then turns into black but OSD shows properly, please check the
HDCP version of monitor support is tally with the source required, and the casting mode of TX/RX
are the same and the HDCP setting is correct.
10. If receiver switches to transmitter which no video input, it will show blank screen or last still image for
seconds.
11. Fast switch mode might cause screen or audio abnormal briefly when switch channel.
12. When output resolution is fixed, the screen or OSD might be cut a little if the source resolution is
much different with the output (like 4K downscale to 720p).
13. In high resolution (like 1080p or 4K) the OSD response will be delayed a little bit.
14. In video wall mode, the OSD may not be in correct size and position
15. When value over 999, the Seven-segment display of HKM02B-4K will show U or F.
16. RS-232 only support data transmission (TXD, RXD), not support hardware handshake (RTS, CTS,
DTR, DSR…)
17. Power from power adapter with priority than power from PoE.
18. The front panel IR will be disable when external IR cable plugged.
19. If IR remote not work properly, please check the battery (especial in low temperature) and reset IR
ID.
20. Audio in of RX only works at unicast mode, and the audio in and audio out of TX must be connected.
21. Audio in of RX is designed for mono Mic in, not for stereo Line in.
22. When using computer or mobile APP management the IP address should be set in same network
segment.
23. Computer software and APP operation please refer to software operating instruction.
24. Not recommend control by panel, computer software and APP at the same time to prevent conflict.
