NOYAFA NF-838 - Manual (Page 9)

Test Result 2:
If the cable is not connect to the emitter or remote identifier, the
launcher will produce “tick” one time and LCD displays the picture
below in the meanwhile:
Test Result 3: Normal wiring map (WIREMAP)
If the cable is normal, the launcher will produce a long “tick” and
LCD displays the picture below in the meanwhile.
RJ45 cable without shielding wire
RJ45 cable with shielding wire
Your excellent helper in cable test! 05