Telos Zephyr Xstream User Manual page 47

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HOT TIP!
The signal fed to these inputs should normally be a mix-minus or those monitoring from the far
end will hear a delayed version of their own audio coming back to them (i.e. an echo).
See Section 10.3 for details on dealing with delay and mix-minus.
A digital gain adjustment can be used to alter the signal levels into the coder section. Levels can
be increased by up to 12dB or decreased by up to 12dB to allow for equipment variation or
differing headroom requirements at the far end. This is the Gain Trim selection of the AUDIO
menu. Note that by adjusting the signal at this point, you will decrease system dynamic range
by a corresponding amount.
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CURIOSITY NOTE!
The Telos Zephyr Xstream uses the more common pin-outs for three pin XLR inputs & outputs.
You can easily remember the correct signals when wiring connectors using the phrase
"George Washington Bridge." Pin 1 = G = Ground, Pin 2 = W = "+" = White (typical color
in mic cable, if there is no white there will be a red conductor), and Pin 3 = B = "-" = Black.
Outputs (Receive from Network)
These are XLR male sockets with the following pin outs.
The analog audio outputs have the following characteristics:
•
Active differential
•
Line Level output. A menu selection Level Out in the AUDIO menu allows
adjustment for Consumer (‐11 dBu) or Professional (+4 dBu) levels.
•
Clip point: 18 dB above nominal level
•
Impedance: < 35 Ohm x 2
If a single‐ended (unbalanced) output is required, connect between ground and either of the
output pins. Do not ground the unused pin. Use the same pin on both outputs to maintain
phase.
USER'S MANUAL
PIN FUNCTION
1 Ground
2 Audio +
3 Audio -
Section 3: GUIDED TOUR of the HARDWARE 35