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MMP-10 I
NSTRUCTION
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 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.
+
-
E
C34
OUT
S1
R56
B1
R57
C22
9v
C23
Acme Battery Corp.
Steekingdesert, New Mexico.
M
ANUAL
Level
+
-
-
P
C16
4
R31
R32
D5
C21
OUT
R45
R55
R47
R46
R54
U3
C29
U4
R55
R44
R54
R42
R52
R43
R53
R41
C24
U9
R55
R61
R63
U8
R54
D1
C26
C33
MIC MULTIPLEXER MMP-10B
USL, INC. TARZANA, CA
U
LTRA
+
+
-
P
P
C11
3
2
R21
R11
R22
D4
D3
C17
R33
R23
R34
R24
R35
R25
R62
R36
R26
C28
C18
C19
R39
R29
R38
R28
R37
R27
C20
C15
MIC4
R40
MIC3
U7
U6
C32
Micr. Trims
- 6 -
S
L
, I
TEREO
ABS
NC
+
-
P
C6
C1
1
R1
R12
R2
D2
C35
C12
C7
R13
R3
R14
R4
R15
R5
R16
R6
C27
U2
U1
C13
C8
C9
R19
R9
R8
R18
R17
R7
C14
R30
MIC2
R20
MIC1
R10
C10
U5
C30
C31
C25
R58
R59
.
C2
C3
C4
C5
FREQ
R60
Freq. Scan
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