GRASS VALLEY 8914 -, Instruction Manual

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4 8914 Instruction Manual
8914 Dual AES/EBU Delay Distribution Ampli fi er
Outputs
There are four identical outputs for delay channel 1— J2, J4, J6, and J8.
There are three identical outputs for delay channel 2 — J1, J3, and J5. The
destination equipment should have an input impedance of 75
Ω
unless it
has loopthrough inputs, in which case the unused loopthrough connector
must be terminated into 75
Ω
.
Adjustments, Testpoints, and Indicators
The 8914 DA has ground and +5V testpoints easily accessible on the front
edge of the module (see
Figure 4 ).
Between the testpoints is a green Power On LED.
Each reclocking section is phase-locked to its AES input signal. The Lock
LEDs on the front of the module are on when the reclocking chip has locked
on the incoming AES data stream. There is one Lock LED for each channel
as shown.
Figure 4. 8914 Adjustments, Testpoints, and Indicators
0
1
2
3
4 5 6
7
8
9
A
B
CD E
F
0
1
2
3
4 5 6
7
8
9
A
B
CD
E
F
0
1
2
3
4 5 6
7
8
9
A
B
CD
E
F
0
1
2
3
4 5 6
7
8
9
A
B
CD
E
F
Delay 1
Coarse increments
Delay 1
Fine increments
Delay 2
Coarse increments
Delay 2
Fine increments
Green LED indicates
Phase Lock Channel 2
Green LED indicates
Phase Lock Channel 1
Green LED indicates
Power On
+5V Testpoint
Ground Testpoint
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