Manual
DIP Switch 5 DIP Switch 6 Sample Rate
Down Down 48 KHz
Down Up 44.1 KHz
Up Down 32 KHz
Reboot Opal aer changing the AES3 sampling rate sengs. In analog mode, the AES3 DIP switches are ignored.
Factory Reset
To factory reset your device using dip switches, follow these steps:
1 Put dip switch 7 & 8 up.
2 Wait unl the Channel 1, Channel 2 and Network/Status indicators ash red and green.
3 Press the reset buon (or power down the unit and back up)
4 Put dip switch 7 & 8 down.
About Mix-Minus
Comrex support spends a lot of me discussing mix-minus, as it is not an obvious concept. Regarding studio connecons to outside
sources, there is a golden rule:
People connecng from outside the studio must never be sent their own audio back to themselves.
If this rule is not followed, the result will be an unpleasant echo in the caller’s ear. It is the responsibility of the studio tech to connect a
feed to each “send” channel that is a mix of all important audio sources (in-studio mics, automaon, other remote sources, etc.) minus
the caller.
Most modern consoles can do this easily. If not, other opons exist and are discussed in the secon at the end of this manual, “Why Do
I Hear Hear Myself Myself?” Finally, it’s important to remember the mix-minus feeds must contain the audio from the opposite send
channel. Opal does not provide any in-box conferencing opons.
Audio Connecons
All analog XLR audio inputs have a nominal level of 0dBu (full scale +20 dBu). When the input mode is changed (via DIP Switch #1) to AES3
mode, the system expects a 48 KHz AES3 input. When the output mode is changed (via DIP Switch #2), a 48 KHz signal will be output. To
change the sampling rate to either 44.1 KHz or 32 KHz, refer to the secon on the previous page, AES3 Sample Rate Select.
Analog input and output pinouts:
1 Ground
2 Balanced audio +
3 Balanced audio –
AES3 input and output pinouts:
1 Ground
2 Data +
3 Data –
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