EverFocus EKR-KB1 operating instructions Autotest of serial channels, Autotest procedure

4.13 Autotest of serial channels

In the case of faulty operation or to check the keyboard, it is possible to carry out a simple test to make sure the communication channels to the video device and the telemetry are working perfectly.

Disconnect any devices connected to the V, A and B lines and make up the following test cable, using two telephone cables and two RJjack boxes supplied with the keyboard:

Phone cable	RJjack 1	RJjack 2	Phone cable
RS485A	White	White	RS485A
RS485B	Yellow	Yellow	RS485B

Warning: this cable is different from the standard connection cable described in § 3.3 - Standard connection cable, page 12.

4.13.1 Autotest procedure

•Connect the cable to connectors A and B

•Connect the cable to connectors A and V

•Connect the cable to connectors B and V.

























The display shows . This means that input and output communication lines for the two lines are functioning correctly.

Other types of message mean that the connecting cable is incorrect or that the test lines are not working. In the example channel A is able to transmit and B receives correctly, but communication is only in one direction.

The third line shows the results of the test: ,  and  stand for the three lines - Video, Telemetry B and Telemetry A respectively.

For each line, A, B and V, one of the following messages will be shown: : the line is not working and is unable to transmit or receive data : the line is able to transmit but not receive

: the line receives but is unable to transmit

: the line transmits and receives correctly.

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