Cobalt Digital COMPASS 9275 HD_SD-SDI Analog Audio De-Embedder - Manual (Page 24)

3-6 •••• User Controls 9275-4C / 9275-8C User Manual •••• (V 1.2)
Operation Notes
This section provides brief notes when operating the 9275.
Audio Proc Amp Controls
The 9275 includes Processing Amplifiers (Proc Amps) for the audio inputs on the card. Note that
these features are not available when using the card-edge controls.
Proc Amp adjustments are applied in the following order:
1. Delay — This option enables you to adjust the delay of the audio channel. If you have
enabled the Delay Lock feature, changing the delay value for one channel automatically
changes the value for the other channel.
2. Gain — This option provides a +/- 20dB gain range in 1dB increments. If you have
enabled the Gain Lock feature, changing the gain value for one channel automatically
changes the value for the other channel. When using the 9275-C, the gain range is +/-
10dB.
3. Invert — This option enables you to invert the polarity of the audio signal for the
selected channel.
Minimum Delay Overview
The line buffer stores incoming video in relation to the incoming video clock timing. The video
data is then read out in relation to the reference timing. This allows the input video to be switched
between sources that may not be perfectly timed without timing glitches. Video source timing must
remain within the buffer window to properly switch between sources. Table 3.3 provides
information on the buffer window available depending on how the Minimum Delay feature is
configured in DashBoard.
Table 3.3 Minimum Delay
If the option is... Format Minimum Delay Maximum Delay
HD 1/4 line 1/2 line
Disabled
SD 1/4 line 1/2 line
HD 1/64 line 1/32 line
Enabled
SD 1/32 line 1/16 line