Mute detection, Operating levels, Mute detection operating levels – Grass Valley NV5128 v.2.5 User Manual
Page 80: Configuration, Or +24, Em0585, Off on, Mute control input channel gain odb +6db, Input gain control diagnostic, Off on operating level sw2, sw3, sw5 similar
70
Rev 2.5 • 24 Sep 09
4. Configuration
Setting Jumpers and Switches on Cards and Card Sets
Mute Detection
The analog audio input card (EM0585) also has a mute detect enable jumper (J21), labeled ‘MUTE
CONTROL’. When the analog audio input level drops to –78 dB or lower for more than 0.25 per
second, the output sample values are replaced with digital silence. This jumper affects all inputs on
the card globally. The ‘ON’ position activates mute control; the ‘OFF’ position deactivates mute
control.
Figure 4-1 shows the location of the DIP switches for the analog audio input card (EM0585).
Figure 4-1. Analog Audio Input Card Switch and Jumper Locations
Operating Levels
Both the analog input card (EM0585) and the analog output card (EM0586) have an additional DIP
switch set that can be used to match the operating level of the facility. For example, if the incoming
signal operating level is +24 dbu, the card can be set to +24 dbu. By matching the incoming signal
level, there is less degradation of the signal when it is converted to digital for internal routing in the
router. Operating levels can be set for +15
dBu
, +18
dBu
or +24
dBu.
SW4
NV5128 ANALOG AUDIO 16 STEREO INPUT
NVISION
PC0639-00
EM0585-
R
R
R
R
L
L
L
L
L
L
L
L
R
R
R
R
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
R
R
R
R
L
L
L
L
13
13
14
14
15
15
16
16
SW2
SW3
SW5
DIAGNOSTIC
1
2
3
4
5
6
7
8
OFF
ON
INPUT CHANNEL GAIN
OdB
+6dB
L
L
L
L
R
R
R
1
1
2
2
3
3
4
4
R
SW1
OFF
ON
J21
OFF
ON
J21
Mute Control
INPUT CHANNEL GAIN
OdB
+6dB
L
L
L
L
R
R
R
1
1
2
2
3
3
4
4
R
SW1
Input Gain Control
DIAGNOSTIC
1
2
3
4
5
6
7
8
OFF
ON
Operating Level
SW2, SW3, SW5 similar