Appendix a – connector pin outs – USL JSD-100 Manual User Manual
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Appendix A – Connector Pin Outs
Connector Pin Outs
For convenience, all connector pin outs are located in this appendix.
DB25F AES Input. The JSD‐100 uses an industry standard pin out for the multi‐channel AES digital audio input.
Cable should be twisted pairs with individual shields and 110 ohm characteristic impedance. The USL supplied
ferrite block should be clipped on to the cable adjacent to the connector to comply with FCC and CE emission
requirements.
Audio Channels AES Pair JSD‐100 Pin out ( +, ‐, shield )
Speakers
1,2
1
24, 12, 25
L, R
3, 4
2
10, 23, 11
C, LFE
5, 6
3
21, 9, 22
Ls, Rs
7, 8
4
7, 20, 8
9, 10
5
18, 6, 19
11, 12
6
4, 17, 5
13, 14
7
15, 3, 16
15, 16
8
1, 14, 2
RJ‐45 AES Input
The JSD‐100 uses the StudioHub pin out for AES over CAT5 or CAT6
Ethernet cable. These cables are twisted pair and have the required
characteristic impedance. The USL supplied ferrite block should be
clipped on to the cables adjacent to the connectors to comply with FCC
and CE emission requirements. The top RJ‐45 connector connects to
audio channels 1 through 8. The bottom RJ‐45 connector connects to
audio channels 9 through 16 if the optional DI‐80 board is installed.
Audio Channels AES Pair
Top RJ‐45 Pins ( +, ‐ )
Speakers
1, 2
1
1, 2
L, R
3, 4
2
3, 6
C, LFE
5, 6
3
4, 5
Ls, Rs
7, 8
4
7, 8
Audio Channels AES Pair Bottom RJ‐45 Pins ( +, ‐ )
9, 10
5
1, 2
11, 12
6
3, 6
13, 14
7
4, 5
15, 16
8
7, 8
Eight Channel Analog Input
The JSD‐100 eight channel analog input is on a DB25F connector. The analog inputs are active balanced
(differential) inputs. They may be driven by balanced or unbalanced sources. When driven by an unbalanced
source, the negative input should be connected to the low side of the source at the source equipment to minimize
ground loop noise. The cable should be twisted pair with individual shields, even when driven by an unbalanced
source. A USL supplied ferrite block should be clipped around the cable to insure FCC and CE EMI requirements
are met. The DB25F connector uses the THX® pin out as specified in the table below.