Ashly ne8800 Bedieningshandleiding - Pagina 7

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Ashly ne8800 Bedieningshandleiding
Operating Manual - ne8800, ne4800, ne4400

7 STANDARD BACK PANEL FEATURES

1. Line Inputs – Depending on the model, there are either four or eight line inputs available on the NE processor. Line
inputs are active balanced with euroblock connectors, and if an unbalanced signal is used, be sure to ground the unused path.
Maximum input level is +20dBu = FS (full scale).
2. Line Outputs - Depending on the model, there are either four or eight line outputs available. Line outputs are servo-
balanced with euroblock connectors, and may be wire balanced or unbalanced, with a maximum output level of +20dBu FS.
3. 12V Digital Logic I/O - All models have a nine pin euroblock connector for logic inputs or outputs. The Logic I/O
tab in software allows logic pins to be assigned as either logic inputs for contact closure preset recall, mic push to talk function,
or as current-limited 12V logic outputs for control of 12V or 5V external devices.
4. 5VDC Remote Level Control - All models have a 10 pin euroblock connector for accomodating up to eight user
defined remote DC level controls. This is done by using an Ashly WR-1 remote attenuator (or equivalent 10K linear potenti-
ometer) along with a remote gain block placed within the DSP section, so that each of the eight Remote DC level control pins
can be assigned to any channel's input or output section. Wire the 5VDC Remote Control ground to the CCW pin of the remote
control potentiometer, wire +5 to the CW pin, and wire the control pin (1-8) to the potentiometer wiper.
5. Ethernet Jack - This is the RJ-45 connector used for 10/100 ethernet control. Maximum cable distance to the nearest
computer, hub, or switch using CAT5 twisted pair copper cable is 100 meters.
6. RS-232 Jack - This connector is for remote control by non-Ethernet based hardware (older Crestron, AMX, etc) which
may use RS-232 control data protocol.
7. Remote Data - This is used to connect a WR-5 programmable remote control or a RD-8C remote level control.
8. Word Clock - If two pieces of digital audio gear need to be synchronized, i.e. their sample rates are very slightly dif-
ferent and must be made to match exactly, word clock synchronization is necessary to avoid sample skipping. Additionally,
when several pieces of gear are cascaded in an AES3 digital audio chain, each digital audio input adds some small amount of
clocking jitter and perhaps sample delay. After several units, the cumulative jitter could cause a loss of lock (and hence loss
of audio), increased distortion due to large amounts of jitter, or even a small delay. By connecting a master word clock to each
device, they all become precisely synchronized.
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