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70 © 2008 VBrick Systems, Inc.
Figure 11. Balanced Audio Cable
Table 18. Analog Input for MPEG-2, MPEG-4 and WM Encoders
The
Audio Out ports are also designed for use with a 1/8" mini plug. Cables are available for
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 Two channel Stereo
Input Connectors 2X TRS Stereo mini-jacks (L + R)
Input Configuration Balanced or Unbalanced
Normal Mode Alternate Mode (High Headroom)
Input Load Impedance 100k Ohms 100k Ohms
Nominal Input level 1.0 Vpp - Unbalanced
0.5 Vpp - Balanced
1.0 Vpp - Unbalanced
0.5 Vpp - Balanced
Maximum Input level 4.0 Vpp - Unbalanced
2.0
Vpp - Balanced
8.0 Vpp - Unbalanced
4.0 Vpp - Balanced
Dynamic Range 94dB 88dB
Encoder Gain Range +7 to -53dB +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.
Channel Separation 83dB 83dB
Head Room 12dB 18dB
Noise Floor (Input
Grounded)
-92dB -92dB
Configuration Two channel Stereo
Output Connectors 2X TRS Stereo mini-jacks (L + R)
Output Configuration Balanced or Unbalanced
Normal Mode Alternate Mode (High Headroom)