Ultra★Stereo Labs, Inc. • 181 Bonetti Drive
San Luis Obispo, CA 993401
Telephone 805.549.0161 • e-mail [email protected]
MMP-10
Multiplexer
INSTRUCTION
MANUAL
Quality Cinema Products
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 2 -
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 war-
ranty 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 improp-
erly 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
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 3 -
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: __________
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 4 -
MMP-10 Features
1
Four laboratory grade test microphones.
Each microphone is calibrated with its multiplexer to insure
utmost accuracy.
2
2
Mic.1
Mic.2
Mic.3
Mic.4
Power
Quality Cinema Products
M
icrophone
M
ultiplexer
MMP-10B
Low Battery
Indicator
(Top View)
1
(Front View)
PUSH
SWITCH
CRAFT
PUSH
SWITCH
CRAFT
PUSH
SWITCH
CRAFT
PUSH
SWITCH
CRAFT
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.
Theater microphone seat mounts included.
Rugged construction.
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 5 -
How It Works
The MMP-10 contains four high quality microphone pream-
plifiers, followed by an adjustable switching circuit. Micro-
phone 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 equip-
ment to four microphones. [Such multi-microphone measure-
ment techniques achieve far superior acoustical results in
auditoriums due to the averaging effect.]
Quality Cinema Products
M
icrophone
M
ultiplexer
MMP-10B
Low Battery
Indicator
PUSH
SWITCH
CRAFT
PUSH
SWITCH
CRAFT
PUSH
SWITCH
CRAFT
PUSH
SWITCH
CRAFT
LED Displays
On/Off
Output Micr. Inputs
MMP-10 Front MMP-10 Top
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 6 -
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 micro-
phone. 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.
Initial Calibration
R48
R49
R50
R51
4520
4052
34184
34184
34184
R64
4011
4011
4011
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
R41
R42
R43
R44
R45
R46
R47
R52
R53
R54
R55
R56
R57
R58 R59
R60
R61
R62
C21
C22
C23
C24
C25
C26
C27C28
C29
C30
C31C32C33
C34
S1
D1
D2D3D4
D5
U1U2
U3
U4
U5U6U7
U8
B1
MIC1MIC2MIC3MIC4
OUT
FREQ
-
+
-
+
-
+
-
+
-
+
PP PPE
OUT
321
4
USL, INC. TARZANA, CA
MIC MULTIPLEXER MMP-10B
R63
U9
C35
R54
R55
R54
R55
9v
Acme Battery Corp.
Steekingdesert, New Mexico.
Level
Micr. Trims
Freq. Scan
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 7 -
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 micro-
phones should be positioned horizontally with the microphone’s
screen facing up, toward the ceiling (Figure2). Insert the micro-
phone 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 multi-
plexer 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 momen-
tary 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.
Setup Procedure
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 8 -
Projector
Mic.1
Mic.2
Mic.3
Mic.4
Power
Quality Cinema Products
To
Analyzer
MMP-10B
M
icrophone
M
ultiplexer
MMP-10B
Low Battery
Indicator
1
2
3
4
The microphones should be placed in the listening environ-
ment as shown above (Figure 1). Variations may apply de-
pending upon size and shape of the auditorium but a diamond
formation is best for overall sound field measurement.
Figure 1
Ideal Microphone Placement
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 9 -
Mounting the Microphone
Microphone
Clip
Telescoping Stand
Microphone
Telescoping
Stand
Seat Mounting
Microphone mounting:
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.
Figure 2
Figure 3
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.
Low Battery Indicator
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 10 -
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
100k
100k
To MMP-10
Pin 2 (+)
Pin 1 (Gnd)
Pin 3 (-)
390Ω
390Ω
33µf NP
33µf NP
1k
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 #
MMP-ADS
MMP-AD1
MMP-AD2
MMP-AD5
Connector Type
3–pin XLR (male)
6–pin XLR (female)
3–pin Mini-XLR (male)
1/8" Stereo Phone Plug
For Use With
Audio Control,
Gold Line, Abacus
ARTA-160, Clark
Techniq, HP-8050
Ivie 30, Ivie PC-40
Abacus ARTA-80
Dolby CP-500
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 11 -
Specifications
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
Output level: 15mV (-36 dB)
Microphone scan rate: 10Hz
(1K ohm load on each leg of the balanced output)
(1K ohm load on each leg of the balanced output)
Factory Settings
MMP-10 INSTRUCTION MANUAL ULTRA
★
STEREO LABS, INC.
- 12 -
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]
© 1996, 1998 Ultra★Stereo Labs, Inc.
San Luis Obispo, CA, USA.
All Rights Reserved
Quality Cinema Products
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
Ask a question and I''ll find the answer in the document
Finding information in a document is now easier with AI
Related papers
Other documents
-
IVIE Bud In-Home Display User guide
-
Roland MMP-2 User manual
-
ABACUS Ampino Operating instructions
-
DPA 4018 Supercardioid Microphone User guide
-
Tascam MMP-16 Owner's manual
-
-
-
-
Motorola ASTRO APX O2 Control Head Mobile Radio Installation guide
-
Pioneer SGX-CA600 User guide
