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4407 Digital Audio Sample Rate Converter
Technical Manual 23
The RS485 comms do not work
The incorrect mode or address may have been selected
· check that jumper PL1 on the sub-module is set to ‘1’
·
press the reset button on the sub-module to change mode if necessary
· check that the multi-drop address is set correctly
· if the multidrop address needs to be changed, push the reset button afterwards
to store the new address
The output signal causes pops and clicks in downstream
equipment
·
check that the reference used has the same phase and frequency as all other
digital audio equipment used in the system
Note: It is recommended to employ a common AES11 reference for all digital audio
equipment if accurate phasing to station signals is required throughout a facility.
The 4407 should meet the timing requirements of AES11 under these conditions.
4407 Status indicators
LED label Meaning when lit
LOSS oF I/P Lights red when I/P 1 is not present or when
channel 1 error flag (ERF) is set
POWER Lights green if all voltage rails present
POLL
POWER
SW1-1
SW1-2
SW1-3
SW1-4
SW2-1
SW2-2
SW2-3
SW2-4
4407 status indicator