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Фрагмент инструкции
LEDs provide confirmation of the active monitor source for each of the cinema channels. If no LED is illuminated when a channel is selected, there is no monitoring of that channel. Processor monitoring is very simple. Select the PROC position and then select the desired L, LC, C, RC, R, SL, SR, or SUB position. Amplifier monitoring includes selections for the L, LC, C, RC, R channels (just like the PROC selections), but offers additional monitoring of all of the additional amplifier outputs. There are 3 Surround Left (SL) and Surround Right (SR) DataPorts available for amplifier connection to drive the speakers on the theater side walls. These are able to create three distinct “zones” where volume controls can be adjusted. One typical installation would be to connect the SL1 and SR1 signals to the speakers closest to the screen, SL2 and SR2 in the next set of speakers further away from the screen and the SL3 and SR3 connections furthest back in the theater. In Surround Decoder applications, the SL3 / SR3 setting monitors the speakers on the backwall. Other installations might require speaker sets where some speakers are along the theater side walls while other speakers are under a balcony overhang. By connecting these speakers as “zones”, the sound levels will be much easier to balance. Any of these amplifier outputs can be verified by selecting them to be routed to the DCM monitor speaker. The DCM also has 4 Subwoofer outputs. Each of these outputs can be individually selected for monitoring on the front panel speaker. The front panel monitoring logic allows combining amplifier channels to verify individual signals or combinations of signals. NOTE: All combining of the individual frequency outputs (2-way or 3-way) is done automatically, so all front panel monitoring is of a full frequency signal. Monitor Volume: The Monitor Volume control is used to adjust the monitoring volume from the front panel speaker. •Rotating the control clockwise increases the volume. •Rotating the control counter-clockwise decreases the volume. HARDWARE DESCRIPTION- Front Panel FRONT PANEL (continued) Diagnostics Check Button and Indicators: The Diagnostics / Indicator section includes an extremely simple method of verifying proper system operation and performing basic troubleshooting. The Power LED shows whether the DCM unit is on or off. The Input Clip LED is helpful in verifying that the cinema format processor is not over-driving the DCM input circuitry. The Load Fault indicator is a unique and powerful feature which verifies that signal inputs into the DCM actually make it through the DCM, the DataPort cables, and the amplifier unit all the way to the speakers, and that the speaker connections are not electrically shorted or open. All of these measurements are being performed constantly (without user action) on ALL output channels and any unusual readings will light the Load Fault LED. If the Load Fault LED is lit, pressing the Diagnostics button (and holding it pressed) will cause the problem channel’s indicator LED to light. This information will let you inspect the system cabling for that channel and troubleshoot the problem. There are two types of indication: If the PROC LED and AMP LED are on, there is no amplifier detected at that DCM amplifier connector. If the AMP LED is on, the amplifier on at that output is measuring a short or an open on its output terminals. REMEMBER: If you configured the DCM Manager software to not have certain channels (for example there is no SUB 3 or SUB 4) or have not assigned a QSC amplifier to a channel, these channels WILL NOT indicate any faults. LOAD FAULT INDICATOR NOTE: The DCM’s Load Fault detection scheme uses a complex averaging algorithm which compares input signals to output signals and measures voltage and current on all amplifier outputs. To sense real world conditions, these measurements must be found to be “out of range” many times before the Load Fault condition is indicated on the front panel. If you are simulating fault conditions, you MUST have a “real-world” signal level through the device (full signal input), and the fault condition must exist for several minutes before the front panel Load Fault LED will light. This extra fault verification time eliminates false triggering which would be confusing to a user. In conclusion, Just shorting the output terminals will NOT cause the fault LED to light,the unit must be driven by real-world input signals and the fault must persist for several minutes. HARDWARE DESCRIPTION- Front Panel FRONT PANEL (continued) Test Jacks: The Test jacks give you access to any of the signals being sent to the front panel speaker (before the gain potentiometer). These signal levels are at the exact same level as the cinema processor output signals (unity gain) and can be used as a test point for system calibration. Emergency Bypass: This is an extremely powerful feature. If there should ever be a problem with the DCM or system cabling, you have th...
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