184050
Page 22
balanced. The 1/4 inch connector can be used either balanced or unbalanced. Phantom
power can drive both sides of a balanced line with +12 V through 1 k
Ω
on each line. It can
also drive an unbalanced input (typically on the 1/4 inch connector) with +9 V through
1.8 k
Ω
. When using unbalanced phantom power, the signal is on the tip and the phantom
power voltage is on the ring. The phantom power is designed to provide low current bias to
electret microphones. Condenser microphone preamps may draw more current than the
phantom power can supply.
7.8
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 8.11.1. 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 unbalanced load, connect the “ – ” output of the JSD-
60 to low side of the unbalanced input at the destination end of the cable to minimize ground
loop noise. The source of audio to drive the HI and VI-N outputs is configurable on a per-format
basis. The VI-N audio output is typically driven by AES/EBU input 8. The HI audio output can be
driven from AES/EBU input 7 or from an audio mix via the channel mixer located in the
Advanced
tab in the Windows GUI. Note that since the JSD-60 has only eight channels of
AES/EBU, the HI/VI-N tracks in a DCP cannot be used by the JSD-60 in a 7.1DS auditorium. In
such auditoriums, the LCR mix is generally used and a USL DAX-202 is used to convert AES/EBU
VI-N from the media block output to analog to drive the HI/VI system.
Summary of Contents for USL JSD-60
Page 1: ...USL JSD 60 User Manual Cinema Processor...
Page 2: ...184050 Page 2...
Page 4: ...184050 Page 4...
Page 43: ...184050 Page 43...
