Ancillary Audio Panel (VN-Matrix 3xx Only)
The VN-Matrix 3
xx
models replace the Input, Blanking, and EDID panels with an
Ancillary Audio panel for audio configuration (see figure 37). Configuration options change
depending upon the model and the transport mode selection. The differences are noted in
the following descriptions.
16
none
none
0
0% (0 Mbps)
0
Groups
transparent
none
1
2
3
4
5
6
7
8
9
Transparent Mode
0
2
stereo
none
no data
pack20
0
Stereo Pairs
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
Stereo Mode (VNM 325 Only)
Figure 37.
Ancillary Audio Menus
1
Audio Channels
— This field reports the number of available audio channels.
•
VN‑Matrix 300
: 4, 8, 12, or 16 depending on the number of licensed groups.
•
VN‑Matrix 325
: Reads 16 when the transport mode is set to
Transparent
.
Reads 2 when the transport mode is set to
Stereo
.
2
Transport Mode
— A drop-down list with two selections:
•
Transparent:
Audio is transported in groups of 4 channels. Multiple groups (see
Selection Boxes
on the next page) can be selected for transport with payloads
depending on the data: SDI (8 Mbps) or HDSDI/3G-SDI (16 Mbps).
Transparent mode is supported on both the VN-Matrix 300 and 325.
•
Stereo:
Audio is transported in stereo pairs. Only one pair can be selected at a
time. Stereo pairs have a payload of 2.4 Mbps.
Stereo mode is supported for the 325 only.
3
Audio Type (Stereo mode only)
— This field reports the format of the audio data
stream.
•
PCM 24, 48 KHz: HDSDI and 3GSDI (typical)
•
PCM 20, 48 KHz: SDI (typical)
4
Compression (Stereo mode only)
— This drop-down list selects the compression to
apply to the stereo audio signal. The normal bitrate for a stereo pair is 2.4 Mbps.
•
Pack 24
: Sends all audio (20 or 24 bits) without compression and sends audio
control data once per second.
•
Pack 20
: Same as Pack 24 except the least significant 4 bits of audio data are
removed and set to zero. The bit rate is 1.92 Mbps.
VNM EC 200 • Device Configuration and Control
51
Summary of Contents for VNM EC 200
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