GRASS VALLEY XCU UXF Fiber Series - Setting External Audio Level; Using Private Data

24 XCU UXF Fiber Series XF Transmission Fiber Base Station User’s Guide (v1.3)
Chapter 2 - Installation
2.6 Setting external audio level
The camera audio levels for channel 1 and 2 can be externally controlled by the XCU. In the
camera system menu, go to the INSTALL
> AUDIO > AUDIO GAIN MODE item and select Ext.
On the OCP 400, push the SETUP button and choose the Cam submenu. Use the NEXT
button to scroll to the REM AUDIO menu and select Rem. Apply a DC voltage to pins 6 and 14
of the signalling connector to control the levels of audio channels 1 and 2 respectively, as
shown in the figure below:
The actual audio level depends on the setting of the switches at the back panel of the camera
adapter. The minimum input sensitivity for nominal output level is -64 dBu for microphone
levels and -32 dBu for line levels. Input sensitivity can be selected with steps of 6 dB.
2.7 Using private data
Private data channels can be used for sending serial data via the transmission cable. For
example, electronic scriptboard or character data for a video display unit or pan and tilt data can
be transmitted to the camera.
☞
Note
☞
Note
Propagation-delay times vary with cable length, especially if a return signal is involved. At
max.lengths the total delay is at least 25 μs and can be more than 30 μs depending on the type
of cable. The duty cycle difference between input and output is max. 5%.
Audio 1 level (pin 6)
Audio 2 level (pin 14)
Mic/Line
Mic/5 V (pin 7)
GND (pin 15)
1k
1k
1k
1k
1k
1k
1k
1k
+4.3V
+3.7V
+3.1V
+2.5V
+1.9V
+1.3V
+0.7V
0V
-22/+4dBu
-28/+2dBu
-34/0dBu
-40/-2dBu
-46/-4dBu
-52/-6dBu
-58/-8dBu
-64/-10dBu
5
4
3
2
1
9
8
7
6
Private
data in
Private
data out
Function Value
Bitrate max. 100 kbit/s
Output level (high) > 4 V
Output level (low) < 4 V
Output impedance 250 
Input level (high) > 2 V (max. 12 V)
Input level (low) < 2 V
Input impedance > 4.7 k