Transcript
MMP-10
INSTRUCTION MANUAL
Multiplexer
Quality Cinema Products
Ultra★Stereo Labs, Inc. • 181 Bonetti Drive San Luis Obispo, CA 993401 Telephone 805.549.0161 • e-mail
[email protected]
MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Limited Warranty ★★★★★ Ultra★Stereo Labs , Inc. warrants that the MMP-10 will be free from defects in material and workmanship under normal usage for a period of ninety (90) days after its purchase new from an authorized dealer. Our obligation under this warranty is limited to repairing or replacing any product or component which we are satisfied does not conform with the foregoing warranty and which is returned to our factory, freight paid, or serviced by one of our authorized contractors. The foregoing Warranty is exclusive and in lieu of all other warranties, whether expressed or implied. Such warranty shall not apply to any product or component (A) repaired or altered by anyone other than Ultra★Stereo Labs or an authorized service contractor; (B) tampered with or altered in any way or subjected to misuse, negligence or accident or (C) which has been improperly connected, installed or adjusted otherwise than in accordance with Ultra★Stereo Labs instruction. This warranty does not cover damage to surface finishes, normal wear, or failure resulting from abuse.
Rev 110598
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MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Table of Contents Features ................................................... 4 How It Works ........................................... 5 Initial Calibration ..................................... 6 Setup Procedure ....................................... 7 Microphone Placement ............................ 8 Microphone Mounting ............................. 9 Low Battery Indicator ............................... 9 Remote Switch Circuits .......................... 10 Specifications ......................................... 11
Please record the following information for your records: Model: ___________________ Serial Number: ___________ Date of Purchase: __________ Purchased from: __________
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MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
MMP-10 Features 1 Four laboratory grade test microphones. Each microphone is calibrated with its multiplexer to insure utmost accuracy. 1 2 PUSH
PUSH
SWITCH CRAFT
PUSH
SWITCH CRAFT
SWITCH CRAFT
PUSH
SWITCH CRAFT
(Top View)
Individual microphone selection or sequential scan. Adjustable scan rate. Blinking low battery indicator. Overall output level adjust. Works with any audio spectrum analyzer. Small diameter, lightweight umbilical cable from the multiplexer to your analyzer. 2 Theater microphone seat mounts included. Rugged construction. Mic.1
Mic.2
Mic.3
Mic.4
Power
Low Battery Indicator
M icrophone M ultiplexer MMP-10B
Quality Cinema Products
(Front View) -4-
MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
How It Works The MMP-10 contains four high quality microphone preamplifiers, followed by an adjustable switching circuit. Microphone signals are routed through the unit in several different configurations. On powerup, only microphone one is amplified and routed through the MMP-10 to your analyzer. The remote switch at the analyzer end of the MMP-10 cable permits selection of other microphones. Pressing the switch once selects microphone two. Press it again and microphone three is selected; once more and microphone four is selected. Pressing it once again starts automatic scan mode, which cycles through all four microphones, one at a time. Pressing it one more time resets the MMP-10 to microphone one. Typical analyzer equipment is shipped with only a single microphone. The MMP-10 allows you to expand your equipment to four microphones. [Such multi-microphone measurement techniques achieve far superior acoustical results in auditoriums due to the averaging effect.] LED Displays On/Off
Output
Micr. Inputs
Low Battery Indicator
PUSH
PUSH
PUSH
PUSH
M icrophone M ultiplexer Quality Cinema Products
MMP-10B
SWITCH CRAFT
MMP-10 Front
SWITCH CRAFT
SWITCH CRAFT
SWITCH CRAFT
MMP-10 Top
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MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Initial Calibration The first time you use your new MMP-10, you should set the output level to match the single microphone supplied with your analyzer. To accomplish this find a suitable location and set up your analyzer with its own microphone. Using pink noise through the sound system, adjust the amplifier level to produce a normal display (85 dbC). Next disconnect the analyzer microphone and connect the MMP-10 (with its four microphones) to the analyzer. Open the MMP-10 back cover. Select microphone one and adjust the overall potentiometer R# 45 inside the MMP-10 to achieve the same level on your analyzer display as measured with the analyzer microphone. Verify that the remaining three microphones have the same reading. (Note: it is not necessary to adjust individual trim potentiometers, R10, R20, R30, R40, as these are adjusted at the factory.) Switch the MMP-10 to scan mode and observe the display of all four microphones. Different analyzers will integrate this switched signal in various ways. Adjust the scan rate potentiometer, R60, to achieve a smooth stable display. If the timing is too slow, the display will bounce. Level
R49 R51 R50 R48
R56 R57
C16
4
+
P
R32
D5
R12
D3
C17
R62
34184
4052
C20
C15
U7 4520
C33
C32
R2 C35
R23 R24 R25 R26
R13 R14 R15 R16
U2
C18
R63
U8
C1
1
D2
C12 C7 R33 R34 R35 R36
R44 R42 R43 R41
C24 R55 R61 D1 R54
+
P R1
R39
R29
R38 R37
R28 R27
MIC4
R40
MIC3
U6
C13 C8 C9
R5 R6 C27 C3
R19
MIC2
C10
R9 R8
R18 R17
C14
R30
C2
R3 R4
U1
C19
U4
-
C6
2
C28
R54 R52 R53
C26
+
P
R22
D4
U3
R55
U9
-
R11
R45
9v C23
C11
3
C21 OUT
Acme Battery Corp. Steekingdesert, New Mexico.
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R21
R55 R47 R46 R54 C22 C29
4011
B1
+
P R31
34184
-
R7
R20
MIC1
U5
C31 C25
C4
C5
R10 FREQ C30
4011
-
34184
E OUT
S1
R64 4011
+
C34
R60
MIC MULTIPLEXER MMP-10B USL, INC. TARZANA, CA
R58
R59
Micr. Trims Freq. Scan -6-
MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Setup Procedure Locate the MMP-10 approximately 2/3 back from the screen, off axis of the center speaker, usually between the center speaker and the right speaker to allow for viewing from the booth. Place microphone one at this position. Place the remaining mics. in a diamond pattern within the central area of the room. The microphones should be positioned horizontally with the microphone’s screen facing up, toward the ceiling (Figure2). Insert the microphone connectors into the appropriate jacks on the MMP-10. Connect the audio cable to the MMP-10 and switch the unit on. The red LED for microphone one will be on. Be sure to position the MMP-10 so you can view the LED display from the booth. Plug the other end (i.e. momentary switch side) of the audio cable into your analyzer up in the projection booth. Switch on Pink Noise. Your MMP-10 wakes up with microphone one selected. Verify you have a signal from microphone one on your analyzer. Select microphone two, three then four to verify operation. Select multiplex mode (indicated by the LEDs flashing in order: red, green, green green) and set your analyzer to the proper level and commence room equalization. The multiplexer has been designed to allow for easy room averaging with a small but accurate four microphone multiplexer system. Room equalization using only one microphone is not recommended due to room modes. Using four microphones and MMP-10 multiplexer will allow for the best sound for the greatest number of seats in the room. Remote control of the MMP-10 is achieved by using a momentary in-line push button located on the audio cable plugged into your analyzer. Pressing the button located on this cable cycles the MMP-10 through five states: Microphone 1, microphone 2, microphone 3, microphone 4 and multiplex (scan) mode. -7-
MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Ideal Microphone Placement
2 4
1
3
Mic.1
Mic.2
Mic.3
Mic.4
Power
Low Battery Indicator
Projector
M icrophone M ultiplexer Quality Cinema Products
MMP-10B
To Analyzer
MMP-10B
Figure 1
The microphones should be placed in the listening environment as shown above (Figure 1). Variations may apply depending upon size and shape of the auditorium but a diamond formation is best for overall sound field measurement.
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MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Mounting the Microphone Microphone mounting: Microphone
Mount the microphone to the telescoping stand as shown (Figure 2) and place the stands in the desired locations (Figure 3) in the theater or other venue.
Clip
Microphone Telescoping Stand
Telescoping Stand
Figure 2
Seat Mounting
Figure 3
Low Battery Indicator Low battery voltage can cause the unit to not switch properly, and may cause measurement errors. To avoid this, the MMP-10 incorporates a low battery sensing circuit. When the battery voltage drops too low, the unit will reset to microphone one, and the red LED will blink. Replace the battery with a standard 9V alkaline battery. -9-
MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Remote Switch Circuits A 3–pin female cord plug with a momentary on/off switch is a standard item in the MMP-10S kit. This switch cord will work with most balanced input analyzers. 3 PIN SWITCH CIRCUIT Pin 2 (+) To MMP-10
33µf NP
1k 100k
390Ω
Pin 1 (Gnd) 100k
390Ω
Pin 3 (-) 33µf NP
1k
MMP Adapters The MMP-10 output is a 3–pin female XLR connector. Included is an adapter to a 3–pin male XLR connector (MMP-ADS). Other adapters are available to convert to almost any analyzer or sound processor: Model # Connector Type For Use With MMP-ADS 3–pin XLR (male) Audio Control, Gold Line, Abacus ARTA-160, Clark Techniq, HP-8050 MMP-AD1 6–pin XLR (female) Ivie 30, Ivie PC-40 MMP-AD2 3–pin Mini-XLR (male) Abacus ARTA-80 MMP-AD5 1/8" Stereo Phone Plug Dolby CP-500
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MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Specifications (1K ohm load on each leg of the balanced output)
Nominal microphone input level: -54 dB (2mv) Maximum output level: -27 dBV (43mV) adjustable Output impedance: 2K ohms Number of microphone channels: 4 Individual microphone channel adjustment range: 9dB Microphone scan rate: 7 to 21 Hz adjustable Power source: 9 volt battery Current drain: Approx. 20 ma. Meets CE Approval Standards
Factory Settings (1K ohm load on each leg of the balanced output)
Output level: 15mV (-36 dB) Microphone scan rate: 10Hz
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MMP-10 INSTRUCTION MANUAL
ULTRA★STEREO LABS, INC.
Ultra★Stereo Labs, Inc. 181 Bonetti Drive San Luis Obispo, CA 93401 USA Telephone 805.549.0161 FAX 805.549.0163 e-mail
[email protected]
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Quality Cinema Products
© 1996, 1998 Ultra★Stereo Labs, Inc. San Luis Obispo, CA, USA. All Rights Reserved
