CRL SMP-900A User manual

SMP-900A
AM STEREO MATRIX PROCESSOR
INSTALLATION AND OPERATION MANUAL
I
PRELIMINARY
I
I
I
fit U1
rwu
m-umci
Circuit Research Labs, Inc.
2522 W. Geneva Drive
Tem e, Az. 85282 U.S.A.
602-438-0888
CBL
SYSTEMS
AM Stereo Matrix Processor
~ -7- J
£e -*■

I
SMP-900A
AM STEREO MATRIX PROCESSOR
INSTALLATION AND OPERATION MANUAL
PROPRIETARY NOTICE
o f
INC.
Rev. PRELIMINARY
P/N
DANG
1V85OO-O1 10145
(C) Copyright Circuit Research Labs,
SMP-900A
Inc.
19 7
3,5 2,964
4,350, 45
4,3 3,229
4,393,346
4,39 ,15
4,679,239
this
Inc.
rep r oduct i on s
4,406,923
4,609, 7
this
any
f r om
or more
patents:
CIRCUIT RESEARCH LABS.
2522 W. Geneva Drive
Tempe, AZ 52 2
(602) 43 -0
Manu factored
of the
under one
following U.S.
The schematic drawings reproduced in this manual contain
proprietary data to Circuit Research Labs, inc. The user of
manual agrees to make no disclosure, reproductions or use of
part of these drawings except by prior written permission
Circuit Research Labs, Inc.

TABLE OF CONTENTS
I
PAGE
GENERAL
1 .
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1.1
I INTRODUCTION
1-2
1 . 2
WARRANTY
1 - 5
1 . 3
NRSC VOLUNTARY STANDARD COMPLIANCE RECORD. 1-6
1.4
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SMP-900A SPECIFICATIONS
1-7
1 . 5
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INSTALLATION
2 .
GENERAL
2- 1
2 . 1
BEFORE PCWER-UP
2- 1
2 . 2
POWER LINE AC VOLTAGE SELECTION
2-2
2.3
INTERNAL JUMPERS
2-3
2.4
PCB LED INDICATORS
2-5
2 . 5
2 . 6
2 . 7
I
Limiter
GUIDELINES FOR SYSTEM SOUND SETTING.
2 . 2-20
OPERATING INSTRUCTIONS
3 .
GENERAL 3 . 1
3-1
SWITCHES & INDICATORS.
3 . 2
SMP-900A (C) Copyright Circuit Research Labs,
Inc.
Page 0-1
19 7
1 -1
1 -1
1 -1
3-1
3-1
3-1
3-2
2-6
2-6
2-6
2-6
INITIAL SET-UP
General. . . .
Input Level. .
Mo du I a t i on . .
Tilt Correct
Single Channel
As ymme try. . .
Stereo Enhance
Monau r a I Output
FRONT PANEL CONTROLS,
Power LED Indicator.
G/R - Mono Support
Pre-Emphasis Switch.
INTERCONNECTIONS
Gene r a I
Balanced Line Connections
Unbalanced Line Connections
SAFETY INFORMATION
Definitions of Safety Symbols
Important Safeguards ....
2-9
2-9
2-10
2-11
2-14
2- 1
2-19
2-19
2-19

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3 . 3
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DESCRIPTION OF THE NRSC STANDARD
4.
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4- 1
GENERAL 4 . 1
4-1
PRE-EMPHASIS/DE-EMPHASIS
4.2
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4-2
F I LTERING
4.3
AUDIO PROCESSING FOR AM STEREO 5 .
5- 1
PROCESSING REQUIREMENTS
5 . 1
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5 - 2
CONVENTIONAL LIMITING 5 . 2
5-3
FULL MATRIX LIMITING 5 . 3
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5-4
CRL MODIFIED MATRIX LIMITING 5.4
THEORY OF OPERATION
6 .
6 - 1
GENERAL
6 . 1
6 - 1
POWER SUPPLY SECTION 6 . 2
6-2
SIGNAL CIRCUITRY 6 . 3
MAINTENANCE, TROUBLESHOOTING & CUSTOMIZATION 7 .
PREVENTIVE MAINTENANCE
7-1 7 . 1
7 . 2
SMP-900A (C) Copyright Circuit Research Labs,
Page 0-2
Inc. 19 7
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Indicators . . .
- Hi Freq Control
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
7-1
7- 1
7 - 1
2
2
3
3
3
4
4
4
4
5
5
5
5
5
6
7
Left
Right
ALIGNMENT PROCEDURES .
General ...............
Test Equipment Required
REAR PANEL CONTROLS AND SWITCHES
Level - Sgl. Ch. Lim
Level - Mono Out
Input Calibrate
Input Calibrate
Bandw i d t h .
Mode Switch. .
Input Level
Equalization
Stereo Enhance
L -I- R and L - R Indicators
Output - Limiting Switch
Output - (L+R)
Output- (L-R)
Output - Asymmetry . . . .
Tilt Correct

for A I i g nment. .
7 . 3
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CUSTOMIZATION 7-
7.4
FACTORY SERVICE
7-9
7 . 5
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APPENDIX .
A.
B. PARTS LISTS
-3
BLOCK DIAGRAM
-4
C.
-5
D. PC BOARD LAYOUT DIAGRAMS
E .
-6
SCHEMATIC DIAGRAM
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SMP-900A (C) Copyright Circuit Research Labs,
Inc.
Page 0-3
19 7
Switch and Control Settings
Alignment Procedure. . . .
7-2
7-3
-1
- 1
-2
7-7
7-7
7-7
TROUBLESHOOTING ............
General .....................
Suggested Component Checks .
GENERAL ..............
System Information (AM4S)
Using SMP-900 in monaural

LIST OF
ILLUSTRATIONS
PAGE
TITLE
FIG.
1-4
TYPICAL TRANSMITTED SPECTRUM . 1 - 1
I
2- 1
SMP-900A FRONT PANEL
2- 1
2-1
SMP-900A BACK PANEL
2 2
2-2
LINE VOLTAGE SELECTION
2 3
2-7
TYPICAL SYSTEM CONFIGURATIONS 2-4
2-
BALANCED LINE CONNECTIONS
2
5
2-
UNBALANCED LINE CONNECTIONS.
2-6
2-17
NORMAL MODULATION ENVELOPE
2-7
UNDER-CORRECTED MODULATION ENVELOPE
2-17
2-
OVER-CORRECTED MODULATION ENVELOPE
2-17
2-9
. 3-6
TYPICAL TRANSMITTED SPECTRUM COMPARISON.
3 1
4-3
NRSC PRE-EMPHASIS 4
1
4-3
NRSC STOPBAND SPECIFICATION
4-2
5 - 2
CONVENTIONAL STEREO LIMITING
5
1
5-3
FULL MATRIX LIMITING
5
2
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5-5
CRL MODIFIED MATRIX LIMITING
5-3
BASS PRE-EMPHASIS FILTER RESPONSE
6-2
6-4
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*
OUTPUT SPECTRUM OF SMP
65
♦ NOT AVAILABLE AT TIME OF PUBLICATION
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SMP-900A (C) Copyright Circuit Research Labs, Inc. Page 0-4 19 7

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SECTION 1 - GENERAL
SAFETY INFORMATION
1.1
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DEFINITIONS OF SAFETY SYMBOLS
1.1.1
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It CAUTION:
I
NOTE :
the
IMPORTANT SAFEGUARDS
1.1.2
fol lowing
service,
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this
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SMP-900A (C) Copyright Circuit Research Labs,
Inc.
Page 1 -1 19 7
equ ipment
Ground i ng
conduc to r
powe r
contact
two-contact
connected to an
equ i pmen t
powe r
voltage selection.
The
calls
condition,
h i g h I i g h t .
Do not
o r
powe r
powe r
A
THE
whe r e
the AC
TRANS I ENT
fIuctuat i ons
line additional
AC
line
*#*«****«:*
WARNING
equ i pmen t .
specific warnings
des i g n ,
Ci r cu i t
cus tomer * s
safety and operating instructions
: is operated.
To minimize shock hazard,
ground.
three-
The
three-
t o
firmly
This
line
AC
areas
on
READ ALL INSTRUCTIONS. All 1
should be read before the equipment
IN AN EXPLOSIVE ATMOSPHERE. Do not operate
in the presence of flammable gases or fumes.
instrument in such an environment
DO NOT OPERATE
this equ ipmen t
Operation of any electrical
constitutes a definite safety hazard.
this manual violates safety standards of
and intended use of this equipment.
Labs Inc. assumes no liability for the
to comply with these requirements.
The following general safety precautions must
during all phases of operation,
Failure to comply with these precautions or with
i n
manufacture,
Research
f a i lure
VOLTAGE PROTECTION. In
and voltage spikes are present
protection may be necessary.
NOTE sign denotes important
attention to procedure,
or the like which is
The CAUTION sign denotes a precaution,
calls attention to an o erating rocedure,
practice, condition or the like, which, if
not correctly performed or adhered to, could
result in the unit not performing properly.
be observed
and repair of this
GROUND AND PCWER CONNECTIONS.
must be connected to an
is accomplished by proper
AC power cable supplied with the
cable must either be plugged into an
electrical outlet or used with a
adapter
electrical g round at
on I y
electrical
use of the
equ i pmen t .
approved
three-contact
with the grounding wire (green)
the powe r outlet,
must only be operated from the type of
source specified. See Section 2.2 for power
THE WARNING SIGN DENOTES A HAZARD. IT CALLS
ATTENTION TO A PROCEDURE, PRACTICE,
CONDITION, OR THE LIKE, WHICH, IF NOT
CORRECTLY PERFORMED OR ADHERED TO, COULD
RESULT IN DAMAGE TO THE UNIT.
info rma t i on . It
practice,
necessary to

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f o rms
the
on
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r ecommended Do not use attachments not by the
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INTRODUCTION
1.2
FEATURES:
I
Filtering
o f
RF I
Integral
Chas s is
i s
I
de-em has i s
SMP-900A (C) Copyright Circuit Research Labs,
Inc. Page
1-2
19 7
The
stat ion
used
monau r a I
negative
Low-f r equency
Mo du I a t i on
a
radios
Th i s
register
Do not operate this equipment
floors.
additional
per form
loss
p r oces so r s
this
Improves
Plate-mod uI a t ed
stereo
Radio
i n
o f
o r
i n
equ i pmen t .
ATTACHMENTS .
manu f acturer .
REPLACEMENT
i n
only.
i f FM
included in this unit
very effective single
f r om
i n
we r e
i s a
channeI
i being
technical
curve was
employ a complementary
while improving the frequency
replace
of the
i n s t a I I
mod i f i ca t i on
CRL SMP-900A was designed to prevent potential
which couId result
stereo. Also
circuit and a
to prevent AM stereo decoders
The SMP
p r oces sing
Commi 11 ee )
This
Do not
Because
do not
unauthorized
ideal choice to upgrade a
to meet the NRSC (National
t he
chain
Voluntary National Standard of January 10,
transmission standard defines specific pre-emphasis
filtering requirements which
of the technical concerns
emphasis curve was developed to allow receiver
to
wi deband
audio
Sys terns
19 7 .
and
many
pre 
manufacturers
character i st ic
response
cove rage
wi th AM
support
I imi ter
ove rIoaded .
WATER AND MOISTURE. Do not operate this equipment near water
in areas with wet floors. Do not operate this equipment
high humidity atmosphere where condensation
VENTILATION. This equipment should never be placed
over a heat register or other source of heated air.
equipment should not be placed in a built
rack unless proper ventilation is provided.
PARTS REPLACEMENT AND/OR MODIFICATION. The maintenance
instructions in this manual are for use by qualified
personnel only. To avoid electric shock do not perform any
servicing other than that contained in this manual,
components with the power cable connected,
danger of introducing additional hazards,
substitute parts or perform any
to this equ i pmen t .
near or
heated air. This
in installation or
are intended to help solve
in AM broadcasting. The
-NRSC Pre-Emphasis and Filtering Characteristic
-Gated Input Cain Reduction
-Patented Overshoot-Corrected Filtering Technique Removes
Out-of-band Components Without Loss of Peak Modulation
-Selectable Low-frequency Tilt Correction Circuit
the Modulation Capability of Many
Transmi tters
-Adjustable Stereo Enhance Circuitry
-10 Segment Input Peak Indicator with 2 dB Range
1 dB step Peak Limiting Control
Rack-mount Chassis With
- P r og r ammab 1 e
-Rugged 1 3/4*
Protect ion

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input
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i s
SMP-900A
I
aud i o
i s
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use
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SMP-900A (C) Copyright Circuit Research Labs,
Inc.
Page 1-3 19 7
An
i n c r ea ses
i nc r ease
To aid the user
unit,
input
over load
indicator,
activity of
adjustable
the
p r even t
higher
that
an
the
LED
r ed
the
the
limiting
dB. This
reduct ion
enhance
i n
1
with
na r r owe r and
specification, which
kHz , i s i n tended to
between stations by
'splatter'
f r equen cy
swi tch .
significant
not
to
i n
elimi nates
user to
capab i 1 i ty
the low
plate-modulated
increase
1 1
a
also
that
kHz
rear
yield
f i Iter
10
inter ference
cause
cu to f f
panel
a
does
selectable tilt
f r equency
transmi tters .
the over a I I
Audio interfacing is done through the use of
connector strip on the back panel. Inputs and
active - ba Ianced and fed through second-order RFI
filters.
Programmable 1 dB per
provided with a range
selects the amount of
applied to the
a barrier
outputs are
supp r es s ion
included
to provide
The SMP accepts either 115 or 230 volts AC (selectable by
programming the back panel power module), 4 -440 Hz. The unit
is housed in a steel enclosure for maximum RFI immunity and
conforms to a standard 1 3/4' rack height measurement. A
rack slide mount is available as an option.
An
v i a
can
in occupied bandwidth (this mode
stereo enhance circuit
gain in the L + R matrix
in apparent stereo separation.
pass clipping filter is used
harmonics which could result
Th i s patented filter
allowing the
I oudnes s
In addition,
correction
phase shift
This often
moduI a t i on
included which
det r imen ta I
into the
and other
A resonant low
excessive clipping
intermodulation artifacts,
these excessive clipping harmonics,
increase limiting to obtain maximum
without audible distortion.
A gated input gain reduction circuit is
provides >20 dB of input gain control to prevent
limiting effects by maintaining consistent levels
limiter circuits. This eliminates 'pumping'
processing artifacts caused by excessive peak limiting.
mediurn-bandwidth radios. The
limits transmitted audio bandwidth to
intended to greatly reduce much of the
stations by reducing the conditions
effects (see Figure 1-1).
option can also be selected
This option, in many cases,
reduct ion
conform to NRSC requirements).
circuitry is
circuitry
(limiting)
in properly setting the audio level into
each channel has a separate 10 segment peak-reading
level meter with a range from -20 to 4-2 dB. A
LED is also provided as one segment of
Additional indicators are included to monitor
filter overshoot - correction circuitry.
the SMP-900A includes a
circuit, which compensates for
common in many
results in an ability to
level by several percent.
step peak
f r om 0 to 4-4
i n s t an t aneou s gain
signal .

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FIGURE 1-1
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Page 1-4
j
t 9 9 9 .4
■■
H
TYPICAL TRANSMITTED SPECTRUM
(Laboratory transmitter, 15 minute eak-store
dis lay; V:10 dB/div., H: 10 kHz/div., 300 Hz
resolution, monaural rogram).
UH
____ __ HHI
MMEBIME MU
SMP-900A (C) Copyright Circuit Research Labs, Inc. 19 7

WARRANTY
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' ■?
g
CIRCUIT RESEARCH LABS, INC. warrants roducts to be free
of defects in materials and workmanshi for a eriod of
one year from the date of urchase. This warranty does not
a ly to roducts that have been damaged due to im ro er
handling during shi ing, or by negligence, im ro er use,
or alterations not authorized by Circuit Research Labs, Inc.
In no event shall Circuit Research Labs, Inc. be liable for
any loss of antici ated rofits, incidental or consequential
damages or any other losses incurred by the urchaser in
connection with the o eration of any CRL roduct.
Circuit Research Labs, Inc.
2522 \XZ Geneva Drive
Tem e, Az. 85282
PLACE
STAMP
HERE
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Siffl
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f - / w ■ loas ’ O' W -wtliw- W ifflfe : wtk.lt/ flK- W ii - a ir A, •
SH

SERIAL #
MODEL #
DATE OF PURCHASE
PURCHASED FROM
I
I Detach Here
I
MODEL #
SERIAL #
I
CUSTOMER NAME
COMPANY NAME
ADDRESS
I
CITY, STATE, ZIP
TELEPHONE # (
)
I
PURCHASE DATE
PURCHASE FROM
A return authorization number must be obtained before any equi ment
may be returned to the factory. Call 602-438-0888 for the number and
mark it on the outside of the shi ing carton. Otherwise, the equi ment
may not be acce ted.
CIRCUIT RESEARCH LABS, INC.
WARRANTY RECORD
CIRCUIT RESEARCH LABS, INC.
WARRANTY REGISTRATION

WARRANTY
1.3
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PRODUCT WARRANTY
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ALL
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o
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PRODUCT CHANGES
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SMP-900A (C) Copyright Circuit Research Labs,
Page 1-5
inc.
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19 7
THIS
INCLUDES ,
PROF ITS,
RESULTING
THIS
OPERATION
THE
DAMAGES ,
TO YOU) .
Labs' warranty does not apply
subjected
neg I i gence ,
author i zed
reserves
of equipment at any time,
i n accordance with
to
to
OTHER
LABS,
OR
This
date
the
to
Circuit Research Labs
pub I i s hed
furnish
Ci r cu i t
that
hand I i ng
imp roper
Research Labs,
the right to change
and
current
later
Inc.
liability
previously
its p roduc t s to
wo r kmanship.
from the
by field bulletins, Circuit Research
the right to do so without incurring any
to modify or update any equipment
Circuit Research Labs,
be free of defects
warranty shall
the product was
products
improper
accidents,
by Circuit
OR CONSEQUENTIAL
PROPERTY DAMAGES,
LOSSES OR
Inc.
spec i f i ca t i on s
merchandise
specifications. While many previously sold products are
upgraded by field bulletins, Circuit Research Labs
reserves
or obligations
sold.
THIS WARRANTY IS IN LIEU OF AND EXCLUDES
WARRANTIES, EXPRESSED OR IMPLIED. CIRCUIT RESEARCH
INCORPORATED WILL NOT BE LIABLE FOR ANY INCIDENTAL
CONSEQUENTIAL LOSS OR DAMAGE WHATSOEVER, WHETHER BASED UPON
ALLEGATIONS OF NEGLIGENCE, BREACH OF WARRANTY, OR OTHERWISE.
DISCLAIMER OF INCIDENTAL OR CONSEQUENTIAL DAMAGES
BUT IS NOT LIMITED TO, PROPERTY DAMAGES, LOSS OF
LOSS OF TIME OR OTHER LOSSES OR INCONVENIENCE
FROM ANY DEFECT IN THE MATERIAL OR WDRKMANSHIP OF
PRODUCT OR ANY OTHER CONNECTION WITH THE PURCHASE,
OR USE OF THIS PRODUCT. (SOME STATES DO NOT ALLOW
EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL
THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY
Incorporated warrants
in materials and/or
extend for a period of (1) year
originally shipped to the user.
WARRANTY IS IN LIEU OF AND
EXPRESSED OR IMPLIED.
WILL NOT BE LIABLE FOR
LOSS OR DAMAGE WHATSOEVER,
Research
have been damaged due to and/or
by shipping companies,
use, or alterations not
Incorporated.

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POSTAGE WILL BE PAID BY ADDRESSEE
I
I
II
National Radio Systems Committee
c/o NAB Science & Technology
1771 N Street, N.W.
Washington, D.C. 20077-6316
NO POSTAGE
NECESSARY
IF MAILED IN THE
UNITED STATES
....II.II..I..I.I
I i I | i |II. i .II...I h .II i ..I.II h ..
BUSINESS REPLY MAIL
FIRST-CLASS MAIL PERMIT NO. 10142 WASHINGTON, D.C.

AM Radio Station Call Letters:
From:
Address:
Zi :
City:
State:
I
Phone: (
1
Tomorrow ’ s
Wove
I
Authorized Station Re resentative Date
1 have im lemented the 75 microsecond reem hasis and 10 kHz audio
bandwidth s ecifications contained in the NRSC voluntary national
standard. Please count my station as being com atible with new NRSC
receivers.

NRSC VOLUNTARY STANDARD COMPLIANCE RECORD 1.4
I
return
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SMP-900A (C) Copyright Circuit Research Labs,
Page 1-6
Inc.
19 7
this card is missing notify Circuit Research Labs
National Radio Systems Committee
c/o NAB Science & Technology
1771 N Street, N .W.
Washington, D.C. 20077-6316
NRSC, so
receiver
info rmed as to the
standard.
Please return the enclosed post paid card to the
that broadcast equipment manufacturers,
manufacturers, and the trade press can be
progress of conversion to the voluntary national
Inc or:

1.5 SMP-900A SPECIFICATIONS
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ELECTRICAL
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Monaural output:
I
o r
at 400 Hz, +10 dBm input / output )
(0 dB ref.
50 Hz
I
I
kHz
dB
1 . 5
kHz 13.5
15 kHz; +0/-
dB
1 . 0
50 Hz Proof Mode:
to
I
kHz bandwidth)
20
level
Proof mode : <0 . 1%
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S+N/N:
Proof mo d e : >50 dB
Proof mode : >40 dB
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SMP-900A (C) Copyright Circuit Research Labs,
Inc. Page 1-7 19 7
>60 dB
>65 dB
>35 dB over selected operating BW,
>45 dB typical
in operate mode
in proof mode
10.5 kHz
11.0 kHz
standard using required
CROSSTALK
Operate mode:
STEREO SEPARATION
Operate mode:
<0.25% over
at or
to kHz; +0/-1.5 dB
-3 dB at 9.5 kHz
>30 dB atten.
>40 dB atten.
(+10 dBm input/output ,
selected operating bandwidth,
below 100% negative modulation
separate tilt
drive mon au r a I
to bypass
HARMONIC DISTORTION
9.5 or 11 kHz BW:
ref. to 0 dB indication
level me ter
OUTPUTS
Type:
Impeden ce :
Level (adjustable):
INPUTS
Type :
Impedence :
Termination:
Level (adjustable):
Provides summed limited signal with
correct provision to
standby t r ansmi 11e r
the stereo exciter
a t
a t
Conforms to NRSC
dynamic measurement method
11 kHz filter
bandwidth selected: 50 Hz to 10 kHz; +0/-
- 3 dB at 11 kHz
>30 dB atten. at
Active balanced (differential)
100 ohms (to drive 600 ohm load)
<-20 to +1 dBm; ref. to 100% negative
mod. level, as established internally
(Ref . 0 dBm=0 .775 VRMS )
Active balanced (differential)
>1 OK ohms bridging
Selectable 600 ohms
<-10 to +20 dBm;
on front panel
FREQUENCY RESPONSE
9.5 kHz filter
bandwidth selected:
L+R to L-R or L-R to L+R, >35 dB over
selected operating BW, >40 dB typical

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INPUT GAIN REDUCTION:
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LIMIT1NG:
SINGLE CHANNEL LIMITER:
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Adjustable 0
STEREO ENHANCE : to 4-3 dB
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PRE-EMPHASIS:
i s
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BASS PRE-EMPHASIS:
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ASYMMETRY:
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TlLT CORRECT:
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INDICATORS :
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2 .
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MODE SWITCH:
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Q
a
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SMP-900A (C) Copyright Circuit Research Labs,
inc. Page 1- 19 7
- R limit indicators monitor
patented overshoot - corrected
ci r cu i try
f rom OFF to -50%;
- 7 0% envelope
single channel
Internally selectable bass boost function
can be placed in circuit to improve apparent
low frequency response of many AM receivers
Selectable circuit allows correction of low
frequency phase shift found in some plate-
modulated transmitters
1. Dual 10-Segment LED-type input level
meters with a 22 dB (2 dB with OVLD)
dynamic range
L 4- R and L
activity of
fiIter
Input leveling AGC; selectable in 2 dB
increments to dB, >20 dB overall range;
Strapped for stereo operation
Selectable in 1 dB increments from
0 to 4-4 dB; dual band, crossover
f r equency ; 3.5 kHz
Adjustable threshold
used to prevent more than
modulation produced by a
(required by Motorola C-QUAM® system)
Follows NRSC standard pre-emphasis
characteristic, 20 Hz to 10 kHz, when
front panel PRB-EMPHASIS switch is in
STD position. Continuously variable via
front panel HI-FREQ EQUALIZATION con t r o I
when front panel PRE-EMPHASIS switch is
i n VAR . position
Adjustable threshold allows up to 4-150%
positive peak modulation
Selects operate, proof, Reverse, and Left
only for test and set up purposes

GENERAL
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OPERATING TEMP . RANGE :
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PCWER REQUIREMENTS:
OPERATING HUMIDITY: non conden sing
0-95% RH,
OPERATING ALTITUDE :
0-15,000 feet AMSL
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(including standard accessories)
SHIPP ING WEIGHT: lbs . 1
DIMENSIONS :
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registered trademark of Motorola,
Inc.
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Inc.
Page 1-9
SMP-900A (C) Copyright Circuit Research Labs,
19 7
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100- 1 30 or
20 VA max imum,
I EC connect o r
19*
16 *
controls and
Product specifications
because of technology updates and product improvements.
200-250 VAC, 4 -440 Hz,
EMI supp res sed ,
s tanda rd
are subject to change without notice
C-QUAM is a
(4 .3 cm) W, 1.75* (4.5 cm) H,
(40.6 cm) D, including protruding
connec tors.
32 to 122 degrees F (0 to 50 degrees C)

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INSTALLATION SECTION 2
GENERAL
2.1
ane 1
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o
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o
SMP-900A FRONT PANEL
FIGURE 2-1
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0
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SMP-900A BACK PANEL
FIGURE 2-2
BEFORE POWER-UP
2.2
Section 2.3
line moduIe
the ower Set
1 .
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as er
i ntended
for the
2 .
Section 2.6.
Connec t the unit
3 .
as per
settings
initial
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to the
4.
Page 2-1
SMP-900A (C) Copyright Circuit Research Labs,
Inc.
1987
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The
the
j um e r s as r equ i r ed
Section 2.4.
**********
WARNING
**********
front panel of
back
AM Stereo Matrix Processor
...... - O
sr.i°
SYS1EMS
Set the switches and controls
listed in Section 2.7.2.
the SMP-900A is pictured in Figure 2-1 and
is pictured in Figure 2-2.
7 j -
Set the internal
system a lication as er
DO NOT PLUG IN THIS UNIT UNTIL THE POWER
LINE SWITCH HAS BEEN CHECKED AND/OR SET FOR
THE CORRECT AC POWER LINE VOLTAGE AS PER
SECTION 2.3. IT IS IMPORTANT TO CAREFULLY
FOLLOW THE PROCEDURES LISTED BELOW IN
SECTION 2.2 BEFORE POWER-UP OF THIS UNIT.