User's Manual

5.4 Built-in Integrity Test (BIIT)

With BIIT (Built-in Integrity Test), the MANDO-301/303 is constantly monitoring and testing the

integrity itself.

5.4.1 BIIT Function for Antenna Disconnect

There is a built-in RF output power detector, which is used to monitor the VSWR of VHF antenna

port. If there is any abnormal condition (open or short) at VHF port of MANDO-301/303,

MANDO-301/303 will cease transmission at next transmission phase.

5.4.2 BIIT Function for Receiver Channel 1 and/or Channel 2 Failure

Receiver at MANDO has built-in receiver signal strength indication (RSSI), which is designed under

pre-defined threshold to judge receiver operating status. If the RSSI level is over pre-defined

threshold, MANDO-301/303 will reflect receiver failure and cease transmission during next

transmission phase.

5.5 Troubleshooting

Please find accordance with above procedure while setting MANDO-301/303. If there is any

problem, please do not hesitate to contact us or our local agent.