CMP-300 technical manual
Broadcast Devices, Inc.
CMP-300 Composite Mixer/
Distribution
Amplifier
TECHNICAL REFERENCE MANUAL
Broadcast Devices, Inc.
5 Crestview Avenue
Cortlandt Manor, NY 10567
Tel. (914) 737-5032
Fax. (914) 736-6916
REV: A 08/04
Table of Contents
The CMP-300 Composite Mixer/Distribution Amplifier
I.
Introduction
A. Unpacking and Inspection
B. General Description
II. Specifications
III. Installation
A. Initial Configuration
B. Location and Hookup Considerations
C. Composite Connections and Adjustments
IV. Warranty
V. Schematic Diagram
Introduction
The CMP-300 Composite Mixer/Distribution System is intended to be used in conjunction with
suitable FM or TV stereo generators and/or composite STLS, SCA and SAP generators for the
purpose of distributing these signals to up to three locations and when desired, can be used to
combine up to three base band type signal for application to up to three exciters. This is done
with a high degree of isolation so that equipment can be interfaced easily. The typical
configuration for the CMP-300 is to distribute a composite stereo and SCA/RBDS signals to a
main and back up exciter.
A. Unpacking and Inspection
Carefully unpack the unit after receipt and inspect for damage that may have occurred during
shipping. If damage is noted, contact the shipper immediately and file a damage claim. The
contents of the package have been insured to cover total replacement cost. Make certain that the
package contents are the same as noted on the packing slip. If not, contact Broadcast Devices,
Inc. Check to make sure all mechanical parts are secure. Units are delivered from the factory
configured for 120 volts A.C. 60 Hz. Operation. Check to make sure that the power source is
correct for proper operation. Units are field configurable for 220 Volt operation. See initial
configuration section of part III, installation section for different power configuration.
B. General Description
Suitable composite stereo, S.C.A., R.B.D.S., or S.A.P. signals can be applied to the input jacks
of the CMP-300. As supplied from the factory, the unit is configured to provide a balanced
47Kohm bridging input. If it is desired to unbalance the input see initial configuration under part
III, installation instructions. All three rear panel outputs of the DA are configured to drive a 50ohm cable.
Adjustments for input gain and individual output level can be accomplished from the front panel.
Power indication is also provided on the front panel.
II. Specifications
Input Impedance:
Output Impedance:
Maximum Output level:
Gain:
Frequency Response:
Total Harmonic Distortion:
Inter - Modulation Distortion:
System Noise:
Input Connector:
Output Connector:
Power Requirements:
Operating Temperature Range:
Physical Dimensions:
47K ohm balanced/unbalanced selectable
50 ohms unbalanced
10 Volts Peak to Peak into 50 ohms
6 dB (variable)
Better than +/- 0.05 dB from 20 Hz to 100 kHz
Better than 0.05% into 50 ohms
Better than 0.05% S.M.P.T.E. 4:1
Better than 80 dB below 4 Volts Peak to Peak
Isolated B.N.C.’s (3)
B.N.C. (3 )
120/240 Volts A.C. 50 - 60 Hertz
0 - 60° Celsius
1.75 H X 19 W X 10 D (inches)
III. Installation
A. Initial Configuration
Before installing the unit it is a good idea to decide whether or not the unit will operate balanced
or unbalanced at its input. Generally, to avoid ground loops between equipment it is advisable to
operate the unit in the balanced configuration. If for some reason it is desired to operate the unit
unbalanced simply push down the appropriate rear panel unbalance switch. The up position of
these switches is for balanced operation and is the normal factory default.
The unit as configured from the factory is set to accept 120 Volts A.C. 60 Hertz electrical power.
To change the power setting first remove the power cord from the power entry connector. Slide
the plastic cover to the left and with a pair of long nosed pliers carefully remove the power select
p.c. board from the power entry module. Select the desired power configuration by placing the
power entry p.c. board back into the module so that the desired power setting can be read from
left to right.
B. Location and Hookup Considerations
Locate the CMP-300 in a 19-inch E.I.A. standard rack enclosure in close proximity to the
equipment that it is going to interface between. Allow sufficient airflow space between equipment
to allow for proper cooling. It is important that the cables being fed from composite sources such
as stereo generators and STL receivers be kept as short as is practical. The CMP-300 can drive
lines as long as 100 feet with no degradation of signals. It is advisable to keep all cable lengths
as short as possible to prevent stray R.F. pick up.
C. Composite Connections and Adjustments
Make all desired input and output connections to your external equipment. Make sure that the
CMP-300 is plugged in to a properly grounded A.C. receptacle. If possible, interrupt the audio
feeding the CMP-300 and measure the signal to noise ratio with a suitable voltmeter. If the noise
measurement obtained is acceptable you can proceed to the final adjustment of the unit. If the
noise is high there may be stray R.F. pick up or a ground loop. It is a good idea to listen to the
system with a suitable audio monitor to determine the source of the noise. Hum is a common
noise present. If hum is present, start by removing one cable at a time to determine the source of
the ground loop. If the hum disappears or changes level when a cable is disconnected, a loop
exists between the CMP-300 and the equipment at the other end of the cable removed. This will
generally not happen with an input unless the unit has been configured for unbalanced operation.
If this is the case, try the balanced input mode of operation. If a ground loop is present between
the CMP-300 and an exciter or STL, feed the CMP-300 to a balanced input. Most modern
exciters accommodate balanced cables.
The CMP-300 has provision to adjust input and output levels independently. There is enough
adjustment latitude to increase input gain or output level if required. The unit is adjusted at the
factory to produce unity gain. Adjustments can be made as necessary to provide the proper
amount of level to the loads connected to the outputs. Each input is adjusted to provide unity gain
output at the factory. If not all inputs are used, turn down the input level of unused inputs to
minimize noise and stray pickup.
IV. Warranty
Broadcast Devices, Inc. products are warranted against failure due to faulty materials or
workmanship for a period of one year from the date of shipment to the ultimate user. The
warranty covers repair or replacement of defective parts at the factory, provided the unit has
been returned prepaid by the user. All shipments to the factory shall have affixed to the outside of
the container an R. A. number obtained from the factory. The above warranty is void if the unit
has been modified by the user outside of any recommendations from the factory or if the unit has
been abused or operated outside of its electrical or environmental specifications. If customer
conducted field tests suggest that the unit may be faulty, whether or not the unit is in warranty, a
full report of the difficulty should be sent to Broadcast Devices, Inc. factory at Cortlandt Manor,
New York. The office may suggest further tests or authorize return for factory evaluation.
Units sent to the factory should be well packed and shipped to Broadcast Devices, Inc. 5
Crestview Avenue, Cortlandt Manor, NY 10567. Remember to affix the R.A. number to the
outside of the carton. Any packages received without such R.A. number will be refused. Note:
freight collect shipments will also be refused. When the unit has been received, inspected and
tested, the customer will receive a report of the findings along with a quotation for recommended
repairs, which are found falling outside of the standard warranty. Units returned for in-warranty
repairs which are found not to be defective will be subject to an evaluation and handling charge.
In-warranty units will be repaired at no charge and returned via prepaid freight.
Out-of-warranty units needing repair require a purchase order and will be invoiced for parts,
labor, and shipping charges.
When ordering replacement part, always specify A) Part number or Description, and Quantity;
B) Date of Purchase, Where Purchased; C) Any Special Shipping Instructions. Always specify a
street address, as shipping companies cannot deliver to a postal box.
Broadcast Devices, Inc. is not responsible for any other manufacturer’s warranty on original
equipment. Nor are we responsible for any failure, damage, or loss of property that may occur
due to the installation or operation of our equipment outside of recommended specifications.
V. Schematic Diagram
5
4
3
2
1
C1
+15V
CR1
.1 50V
P3
CR2
U8
LM337
-DC
3
2
4.7uF 50V
2
1N4007
C17
C21
4700uF 50V
1
7
3
+
2
-
D
R2
47K 1/4W
4
R1
47K 1/4W
C23
.1 50V
47K 1/4W
HDR3
1
8
6
5
.1 50V
.1 50V
R6
7
4
R5
47K 1/4W
4.7uF 50V
D
1
2
3
4
CR6
8
7
6
5
+DC
CR5
1N4007
C19
U9
LM317
3
R4
47K 1/4W
C27
3300uF 25V
.1 50V
S1
4.7uF 50V
47K 1/4W
C22
4700uF 50V
CR8
+15V
Vi
Vo
.1 50V
1
8
6
5
1N4007
2
C24
.1 50V
R21
120 1/2W
CR7
1N4007
C29
.1 50V
C30
3300uF 25V
1
-
C26
.1 50V
1N4007
C18
4.7uF 50V
C4
J2
BNC
+
CR3
1N4007
C25
1.3K 1/2W
VR1
10K
C3
-15V
C5
2
R19
120 1/2W
R18
.1 50V
C6
3
3
CR4
U1
AMP02
+15V
INPUT 2
-15V
Vo
1
R3
1N4007
Vi
ADJ
J1
BNC
ADJ
C2
INPUT 1
VR2
10K
U2
AMP02
1N4007
C20
C7
-15V
C28
R20
4.7uF 50V
1.3K 1/2W
.1 50V
4.7uF 50V
C8
C9
INPUT 3
C10
J3
BNC
.1 50V
.1 50V
+15V
4.7uF 50V
R9
7
+
2
-
R7
47K 1/4W
R8
47K 1/4W
4
3
C
1
8
6
5
47K 1/4W
C
VR3
10K
U3
AMP02
DS1
R21
-15V
C11
+15V
R22
1.3K 1/4W
-15V
4.7uF 50V
C12
1.3K 1/4W
CM5693
.1 50V
C31
-15V
4
C32
2
3
+
VR5
10K
-
C13
+15V
7
.1 50V
C14
R15
1K 1/4W
.1 50V
J4
BNC
4.7uF 50V
R22
5
6
8
1
49.9 1/4W
U5
BUF634
C34
C33
.1 50V
4.7uF 50V
R10
+15V
4.7uF 50V
10K 1/4W
B
B
C35
R11
R14
-15V
C36
2
-
R27
4
10K 1/4W
U4
NE5534
4
10K 1/4W
1
8
6
5
7
+
VR4
20K
C15
VR6
10K
2
3
+
3
R12
-
10K 1/4W
7
4.7K 1/4W
C16
.1 50V
4.7uF 50V
J5
BNC
R23
5
6
8
1
49.9 1/4W
U6
BUF634
C37
.1 50V
-15V
R16
1K 1/4W
C38
.1 50V
4.7uF 50V
+15V
4.7uF 50V
R13
C39
-15V
10K 1/4W
C40
.1 50V
4
C43
15pF 50V
3
+
7
2
-
VR7
10K
R17
1K 1/4W
A
J6
BNC
4.7uF 50V
R24
5
6
8
1
49.9 1/4W
U7
BUF634
C41
A
C42
.1 50V
+15V
4.7uF 50V
{}
Title
Size
C
Date:
5
4
3
2
Broadcast Devices, Inc.
CMP-300 MAIN BOARD
Document Number
Rev
B
Tuesday, September 28, 2004
1
Sheet
1
of
1
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement