Zaxcom TRX-900AA Manual Extended Menu22Encryption Code pageIf you set an encryption code the transmitted audio will be encrypted and can only be listened to ifthe receiver has the matching encryption code entered. When receiving an audio signal and the codesdo not match, all that will be heard is white-noise or silence.These two sets of numbers are formed into a single six-digit encryption code which provides a total of16,777,216 possible combinations.To adjust the encryption code1. Momentarily press the MENU key to advance to the next character.2. To change the designated character, press the INC or DEC key.3. To exit this page, press and hold the MENU key for 1 second.NOTE: Both of these codes should always be set to 000 for normal un-encrypted operation.ID1:000 ID0:000