050D A
 The VHF-DSC self-test function (if available) usually performs the following:
a) Makes a diagnostic test of the system without actually transmitting a signal. 
b) Transmits a very weak DSC signal which is picked up by the Ch-70 receiver. 
c) Transmits a weak voice signal which is picked up on Ch-16.
d) Does a check sum of the memory chips. 
