PANASTEREO CX230EX CINEMA BOOTH MONIT0R OWNER'S MANUAL PANASTEREO CX230 CINEMA MONITOR PANASTEREO CX230EX CINEMA BOOTH MONITOR OVERVIEW The CX230 Monitor is the world's first computer controlled booth monitor. It is simple to use, provides advanced features not previously found in booth monitor equipment and has been designed for easy interface to computer automation systems via a standard RS232 interface connector. SYSTEM FEATURES · · · · · · · · · · · · Single-chip microprocessor control system with power supervision and watchdog circuits provides high immunity to interference for reliable latch-up-free operation. Monitoring of both sound processor outputs and amplifier outputs. Full monitoring of biamp systems. Built-in analogue to digital converter with digital bargraph meter for auditorium volume indication. Fast Mute function. Two-digit LED digital volume indicator. Built-in compressor for easier monitoring of highly dynamic (SR or digital) soundtracks. Built-in stereo 25watt monitor amplifier. All inputs are balanced and isolated for low noise, high quality monitoring and zero interaction with the cinema sound system. All functions (including volume control) accessible via RS232 serial interface. Digitised auditorium sound level available via RS232 serial interface for remote indication of volume level with computer automation systems. All monitor connections via removable mini-Phoenix connectors so the monitor chassis can be easily removed for service. SYSTEM SPECIFICATIONS Sound processor Inputs: Amplifier Inputs: Amplifier Output Power: Nominal 300mV input sensitivity, 10k ohm balanced Nominal 3V input sensitivity, 100k ohm balanced 2 x 25W RMS into 8 ohms. PANASTEREO CX230 CINEMA MONITOR CX230 OPERATION MONITORING AN INDIVIDUAL CHANNEL Select a channel to be monitored by pressing the pushbutton for the appropriate channel once. An LED indicator will illuminate above the selected input button. Adjust the volume control for a comfortable listening level. The volume is indicated by the 2-digit display to the left of the control. Biamp installations only: It is possible to monitor each of the front channel high and low frequency outputs separately. Press the left, centre or right pushbutton once to monitor a mix of the high and low frequency outputs for each channel. Press the same button a second time to monitor the high frequency output only. Press the same button a third time to monitor just the low frequency output. Repeatedly pressing the same button will cycle through the above three options. MONITORING A MIX When the MIX button is pressed, the monitor output will be a blend of the front three channels (left, centre and right). In MIX mode a compressor is automatically inserted to reduce the difference in volume between very loud and very soft signals. This makes it easier to monitor digital and SR soundtracks. The compressor can be disabled by setting the options. (See Installation section). The surround channel is not included in the mix because the delay which is normally introduced in the cinema processor for the surround channel may cause confusing echo effects. The surround and sub bass channels must be monitored individually. MONITORING THE PROCESSOR OUTPUTS OR THE AMPLIFIER OUTPUTS Press the SOURCE pushbutton to select either the outputs from the sound processor or the outputs from the amplifiers. Repeatedly pressing the SOURCE button will toggle back and forth between the processor and the amplifier outputs. MUTING THE MONITOR OUTPUTS Press the MUTE button to silence the monitor without changing the volume setting. Press the MUTE button a second time to restore the monitor output to normal. (The monitor can also be muted by turning the volume down to zero, but in this case the volume must be turned up again to restore the previous listening level). PANASTEREO CX230 CINEMA MONITOR CX230 INSTALLATION CONNECTING THE SOUND PROCESSOR OUTPUTS. NOTE: For non-biamped installations, the left channel should be connected to the LL input , the centre channel to the CL input and right channel to the RL input. 1. SOUND PROCESSOR WITH UNBALANCED OUTPUTS (DOLBY, SMART, ULTRA STEREO) Use two-core shielded audio cable to connect the outputs from the sound processor to the monitor "from processor" inputs. Connect the "+" terminal from each sound processor output to the "+" terminal of each corresponding monitor "From Processor" input. Connect the ground terminal of each processor output to the "-" terminal of each corresponding monitor "From Processor" input. Connect the cable shield to the "E" terminal of each monitor "from processor" input only. Do not connect the shields at the sound processor. 2. SOUND PROCESSOR WITH BALANCED OUTPUTS (PANASTEREO) Use two-core shielded audio cable to connect the outputs from the sound processor to the monitor "From Processor" inputs. Connect the "+" terminal from each sound processor output to the "+" terminal of each corresponding monitor "From Processor" input. Connect the "-" terminal of each processor output to the "-" terminal of each corresponding monitor "from processor" input. Connect the cable shield to the "E" terminal of each monitor "from processor" input only. Do not connect the shields at the sound processor. CONNECTING THE AMPLIFIER OUTPUTS. NOTE: For non-biamped installations, the left channel should be connected to the LL input , the centre channel to the CL input and right channel to the RL input. Use light gauge unshielded cable for this purpose. Connect the "+" (Red) terminal of each amplifier output to the "+" terminal of each corresponding monitor "From Amplifier" input. Connect the "-" (Black) terminal of each amplifier to the "-" terminal of each corresponding monitor "From Amplifier" input. NOTE: DO NOT USE A SINGLE GROUND CONNECTION BETWEEN THE AMPLIFIERS AND THE MONITOR OR CONNECT THE "-" (BLACK) TERMINALS OF THE AMPLIFIERS TOGETHER. SUCH CONNECTIONS MAY CAUSE CROSSTALK, UNPREDICTABLE AMPLIFIER BEHAVIOUR OR DAMAGE TO WIRING. PANASTEREO CX230 CINEMA MONITOR CX230 INSTALLATION con't CONNECTING THE MONITOR SPEAKER OUTPUTS Use medium gauge (minimum 0.75mm2) twin polarised wire (figure 8) between each of the monitor speaker outputs and the monitor speakers. The monitor speakers can be 8 or 4 ohms. If you are using only one speaker, connect it to the left channel output and set the "MONO/STEREO" switch at the back of the monitor unit to the "MONO" position. Otherwise ensure that the "MONO/STEREO" switch is in the "STEREO" position. CONNECTING THE SERIAL INTERFACE TO A COMPUTER AUTOMATION SYSTEM. Use 4-core shielded computer or audio cable. The CX230 is configured as a DCE device (Data Circuit Terminating Equipment), i.e. pin 2 = transmit data out and pin 3 = receive data in. Connect one conductor to pin 2 , one to pin 3 and one conductor to pin 5 (ground). The fourth conductor can be left unused or also connected to pin 5 (ground). Solder the cable shield to the body of the D-connector plug. If the connection is to a DTE device (Data Terminal Equipment) such as a PC or the Panalogic RC140 automation unit, the cable should be wired pin-for-pin (i.e. pin 2 to pin 2, pin 3 to pin 3, and pin 5 to pin 5). If the connection is to another DCE device, pins 2 and 3 must be crossed over (reversed) at one end. SETTING THE OPTIONS WITH THE VIRTUAL DIP SWITCHES The CX230 has a number of options which may be accessed using the following method: Press and hold the "MIX" button for at least 2 seconds. The bargraph display will change to show a red bar at the extreme right. At the extreme left of the bargraph display the first 4 green LEDs indicate which options are set. To change an option, press the corresponding button to toggle the LED on or off. For example the far left button "LEFT" will toggle the first green LED (option 1). The next button "CENTRE" will toggle the second green LED (option 2) etc. The available options are as follows: Option 1 (LED 1) ­ Select 1.5 dB per division resolution for the bargraph meter. (Normal resolution is 3dB per division). Option 2 (LED 2) ­ Defeat compressor. The MIX compressor is bypassed at all times. Option 3 (LED 3) ­ Defeat biamp mode. Pressing the LEFT, CENTRE or RIGHT buttons always selects only the LF input. Option 4 (LED 4) ­ Disable selection of processor inputs. The "SOURCE" button is locked in "AMPS" mode. "PROC" cannot be selected. To exit the DIP switch mode press and hold the "MIX" button for at least 2 seconds. The red bar at the right of the bar graph will disappear to indicate normal meter mode. PANASTEREO CX230 CINEMA MONITOR SYSTEM ALIGNMENT After installation it is necessary to adjust each of the input levels of the monitor to ensure correct balance between each input and to calibrate the auditorium sound level meter. Alignment is best performed at the same time as the sound processor B-Chain alignment to avoid duplication. Equipment required: Pink Noise Card, Real Time Analyser (RTA) ALIGNMENT OF NON-BIAMPED SYSTEMS 1. Insert a pink noise card into the appropriate slot in the sound processor. 2. Set the sound processor to Optical Stereo and set the volume to level "7" for a pink noise level of 85db in the auditorium. 3. Select the pink noise generator to CENTER. 4. Turn off the Sub Bass amplifier. 5. Check the SPL reading on the RTA. It should be 85dB. If not, check the B-Chain alignment of the sound processor. 6. Select the "SOURCE" switch to "AMPS", and select "CENTER". 7. Adjust the "AMPLIFIERS - CL" trimpot so that the CX230 sound level meter reads 85db. 8. Select the "SOURCE" switch to "PROC". 9. Adjust the "Processor - CL" trimpot so that the CX230 sound level meter reads 85db. 10. Turn off the Centre channel amplifier and turn on the Sub Bass amplifier. 11. Note the SPL reading on the RTA. 12. Select the "SOURCE" switch to "AMPS", and select "SUB BASS". 13. Adjust the "AMPLIFIERS - SW" trimpot so that the CX230 sound level meter reads the same as the SPL reading on the RTA. 14. Select the "SOURCE" switch to "PROC". 15. Adjust the "Processor - SW" trimpot so that the CX230 sound level meter reads the same as the SPL reading on the RTA. 16. Turn on the Centre Channel amplifier. PANASTEREO CX230 CINEMA MONITOR 17. Select the pink noise generator to LEFT. 18. Check the SPL reading on the RTA. It should be 85dB. If not, check the B-Chain alignment of the sound processor. 19. Select the "SOURCE" switch to "AMPS", and select "LEFT". 20. Adjust the "AMPLIFIERS - LL" trimpot so that the CX230 sound level meter reads 85db. 21. Select the "SOURCE" switch to "PROC". 22. Adjust the "Processor - LL" trimpot on the monitor so that the CX230 sound level meter reads 85db. 23. Select the pink noise generator to RIGHT. 24. Check the SPL reading on the RTA. It should be 85dB. If not, check the B-Chain alignment of the sound processor. 25. Select the "SOURCE" switch to "AMPS", and select "RIGHT". 26. Adjust the "AMPLIFIERS - RL" trimpot so that the CX230 sound level meter reads 85db. 27. Select the "SOURCE" switch to "PROC". 28. Adjust the "Processor - RL" trimpot so that the CX230 sound level meter reads 85db. 29. Select the pink noise generator to LEFT SURROUND. 30. Check the SPL reading on the RTA. It should be 85dB. If not, check the B-Chain alignment of the sound processor. 31. Select the "SOURCE" switch to "AMPS", and select "LEFT SURROUND". 32. Adjust the "AMPLIFIERS - LS" trimpot so that the CX230 sound level meter reads 85db. 33. Select the "SOURCE" switch to "PROC". 34. Adjust the "Processor - LS" trimpot so that the CX230 sound level meter reads 85db. PANASTEREO CX230 CINEMA MONITOR 35. Select the pink noise generator to RIGHT SURROUND. 36. Check the SPL reading on the RTA. It should be 85dB. If not, check the B-Chain alignment of the sound processor. 37. Select the "SOURCE" switch to "AMPS", and select "RIGHT SURROUND". 38. Adjust the "AMPLIFIERS - RS" trimpot so that the CX230 sound level meter reads 85db. 39. Select the "SOURCE" switch to "PROC". 40. Adjust the "Processor - RS" trimpot so that the CX230 sound level meter reads 85db. The CX230 alignment is now complete. PANASTEREO CX230 CINEMA MONITOR ALIGNMENT OF BIAMPED SYSTEMS 1. Insert a pink noise card into the appropriate slot in the sound processor. 2. Set the sound processor volume to level "7" for a pink noise level of 85db in the auditorium. 3. Select the pink noise generator to CENTER. 4. Turn off the Sub Bass amplifier. 5. Check the SPL reading on the RTA. It should be 85dB. If not, check the B-Chain alignment of the sound processor. 6. Turn off the Centre channel low frequency amplifier and note the SPL reading on the RTA. 7. Select the "SOURCE" switch to "AMPS", and select "CENTER HF" by pressing the "CENTER" pushbutton twice. Only the "HF" LED above the CENTER pushbutton should be illuminated. 8. Adjust the "AMPLIFIERS - CH" trimpot so that the Cx230 sound level meter reads the same as the SPL reading on the RTA. 9. Select the "S ...