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Figure 11. Balanced Audio Cable
Table 18. Analog Input for MPEG-2, MPEG-4 and WM Encoders
Configuration
Input Connectors
Input Configuration
Input Load Impedance 100k Ohms
Nominal Input level
Maximum Input level
Dynamic Range
Encoder Gain Range
Channel Separation
Head Room
Noise Floor (Input
Grounded)
The
ports are also designed for use with a 1/8" mini plug. Cables are available for
Audio Out
both balanced and unbalanced applications from electronics specialty stores (e.g. Radio
Shack) and from VBrick. Table 19 and Table 20 outline the specifications of the output audio
levels.
Table 19. Analog Audio Output for MPEG-2 Decoders (ENDEC configuration)
Configuration
Output Connectors
Output Configuration
70
Two channel Stereo
2X TRS Stereo mini-jacks (L + R)
Balanced or Unbalanced
Normal Mode
1.0 Vpp - Unbalanced
0.5 Vpp - Balanced
4.0 Vpp - Unbalanced
2.0 Vpp - Balanced
94dB
+7 to -53dB
83dB
12dB
-92dB
Two channel Stereo
2X TRS Stereo mini-jacks (L + R)
Balanced or Unbalanced
Normal Mode
Alternate Mode (High Headroom)
100k Ohms
1.0 Vpp - Unbalanced
0.5 Vpp - Balanced
8.0 Vpp - Unbalanced
4.0 Vpp - Balanced
88dB
+12 to -48dB Note: Depending on the
input level for certain gain adjustments,
the signal could be distorted at the input
to the analog-to-digital converter.
83dB
18dB
-92dB
Alternate Mode (High Headroom)
© 2008 VBrick Systems, Inc.
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