Date printed: 24.01.12
29
D21m System
RA1
RA2
RA3
RA4
RA1...4: Factory Setting (Level Fine-Adjustment)
LEDs
PHANTOM 1-4
For each channel a yellow LED indicates that pantom power is on.
SIGNAL 1-4
For each channel a green LED indicates whether input signal is present; its
brightness is a rough indication of the signal level.
Alignment RA1-4
Please note that the level fine-adjust trimmer potentiometers are factory-set.
They need to be adjusted only after having repaired the card.
Select 15 dBu input sensitivity. Feed an analog signal with a level of +6 dBu to
one of the analog inputs. Measure the digital output level either on the MADI
output or, after routing through the core, on one of the AES/EBU outputs.
Adjust the level with the corresponding trimmer potentiometer to –9 dB
FS
.
Connector Pin Assignment
4× BALANCED MIC IN/SPLIT OUT
(25pin D-type, fem., UNC 4-40 thread)
1
Solder/Crimp View
(or Socket View)
13
25
14
Pin Signal
Pin Signal
1
CH 4 split out +
14 CH 4 split out –
2
CH 4 split out GND
15 CH 3 split out +
3
CH 3 split out –
16 CH 3 split out GND
4
CH 2 split out +
17 CH 2 split out –
5
CH 2 split out GND
18 CH 1 split out +
6
CH 1 split out –
19 CH 1 split out GND
7 CH 4 in +
20 CH 4 in –
8
CH 4 in GND
21 CH 3 in +
9 CH 3 in –
22 CH 3 in GND
10 CH 2 in +
23 CH 2 in –
11 CH 2 in GND
24 CH 1 in +
12 CH 1 in –
25 CH 1 in GND
13 n.c.
