USL JSD-100 Manual - Manual (Page 21)

Page 21
6.6 Audio Input Connections
8/16 Channel AES Input
The JSD-100 accepts 16 channel AES audio if the optional DI-80 card is installed. Otherwise, the JSD-100 accepts 8
channel AES audio. This input is typically driven by the digital cinema server (DCS). The JSD-100 includes a DB25F
connector using an industry standard
5
pin out and a pair of RJ-45 connectors using the StudioHub
6
pin out. The
first six channels are assigned speakers by industry convention. The remaining channels can be configured by the
user (i.e., sources for HI/VI-N, Lrs, Rrs, etc.). For convenience, all connector pin outs are listed in Appendix A.
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 Ensure FCC and CE EMI requirements
are met. The DB25F connector uses the THX® pin out as specified in the table in Appendix A.
Two Channel Analog Inputs
The JSD-100 has two stereo (two channel) analog inputs (AUX and NS) on RCA connectors. Connect these to
appropriate sources using RCA cables. Various stereo decode methods are available in the system configuration.
These allow direct driving of the left and right speakers, adding a synthesized center channel, and adding surround
channels.
Two Channel Digital Inputs
The JSD-100 has two S/PDIF inputs and one TOSLINK input.
S/PDIF Inputs. Two stereo digital inputs on RCA connectors. These are marked COAX1 and COAX2 on the JSD-
100 rear panel. These are standard S/PDIF (Sony Philips Digital Interface) inputs. Connect these to appropriate
sources with 75 ohm coaxial cable with RCA connectors on each end. As with the other stereo inputs, various
decode methods are available. The USL supplied ferrite block should be clipped on to the cables adjacent to
the connectors to comply with FCC and CE emission requirements. NOTE: The COAX2 connector should not be
used if the AES output module is used. This input is used by the AES output module.
TOSLINK Input. A TOSLINK optical digital stereo input is included on the JSD-100. Connect this input to an
appropriate source with a standard TOSLINK cable. As with other stereo inputs, various decode methods are
available.
Single Channel Audio Inputs
The JSD-100 has a PA microphone input and an RTA microphone input. The USL supplied ferrite block should be
clipped on to the cables adjacent to the connectors to comply with FCC and CE emission requirements.
PA Microphone Input. Plug a PA microphone in to the combination XLR / ¼” phone jack. The microphone
input may be configured to drive the main or the surround speakers. In addition, the PA microphone input can
drive the RTA for room equalization.
RTA Microphone Input. The RTA microphone input can drive the real time analyzer for room equalization.
The jack is a 3.5mm stereo jack with the high side of the microphone connected to tip and the low side to
sleeve. The connector ring is driven with +10V through 2.2k to power a preamp in the microphone.
5 The JSD-100 DB25 AES input uses a de-facto industry standard pin out. The pin out was the subject of a draft SMPTE Engineering Guideline in
2004. Though SMPTE never adopted the guideline, much of the industry adopted the pin out specified in this draft.
6 Please see the Studio Hub website: www.StudioHub.com