Usl JSD-100 Specifications download pdf (Page 17)

Page 17

Six Channel Analog Input

The JSD-60 six 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. The DB25F connector uses the THX® pin out as specified in the table in Appendix A.

Two Channel Analog Input

The JSD-60 has a stereo analog input (Non/Sync) on two RCA connectors. Connect these to an appropriate source

using RCA cables. Various stereo decode methods are available in the system. These allow direct driving of the left

and right speakers, adding a synthesized center channel, surround, and custom mix for all output channels.

Two Channel Digital Inputs

The JSD-60 has an S/PDIF input and a TOSLINK input.

S/PDIF Input. A stereo digital input on an RCA connector marked COAX. It is a standard S/PDIF (Sony Philips

Digital Interface) input. Connect 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.

TOSLINK Input. A TOSLINK optical digital stereo input is included on the JSD-60. 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-60 has a Public Address (PA) and Real Time Analyzer (RTA) microphone input.

PA/RTA Microphone Input. Plug a PA microphone in to the combination XLR / ¼” stero (TRS) 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. The jack is a combination XLR and ¼” TRS (stereo)

connector. The XLR input is balanced. The 1/4 inch connector can be used either balanced or unbalanced.

Phantom power can drive both sides of a balanced line with +12V. It can also drive an unbalanced input

(typically on the 1/4 inch connector) with +9V. When using unbalanced phantom power, the signal is on the

tip and the phantom power voltage is on the ring

6.6 Analog Audio Output Connections

The JSD-60 provides eight main channel outputs plus HI and VI-N outputs. All outputs are balanced and may drive

balanced or unbalanced loads. When driving unbalanced loads, run two conductor shielded cable and connect the

“ – ” terminal of the JSD-60 output to the low side of the unbalanced load at the load instead of at the JSD-60 to

minimize ground loop noise.

Main Audio Outputs

The eight channel analog output connector provides eight balanced analog outputs. These are full-range outputs if

no crossover board is installed. If a crossover board is installed, this connector provides the low band outputs of

the screen channels, the full range surround channels, and the LFE1 output. The crossover output connector

provides three crossover high band outputs plus the LFE2 output. On systems with the crossover, four DIP switches

set the crossover frequency for the bypass passive crossover. If the crossover is not to be used, set all the switches

to off. Adjust the low trim pot to yield the desired bypass output level. Remember that the front panel fader also

affects the output level when in bypass. For more information on bypass operation with crossovers, see Section

7.7.1. The connector pin outs are listed in Appendix A

HI/VI-N Outputs

The JSD-60 has balanced HI and VI-N outputs that can drive balanced or unbalanced loads. As with other outputs,

the use of twisted pair shielded cable is suggested whether the load is balanced or unbalanced. When driving an

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Usl JSD-100 Specifications Page 17

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