®
EA2000
Half-Duplex Equalizing Amplifier
Installation/Operation Manual
C632M (2/88)
Pelco • 3500 Pelco Way, Clovis, CA 93612-5699 • USA • (800) 289-9100 or (1-559) 292-1981
FAX (800) 289-9150 or (1-559) 292-3827
International customers call (1-559) 292-1981 or FAX (1-559) 348-1120
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LIST OF ILLUSTRATIONS
Figure
Page
1
2
3
4
5
Typical Installation Configuration ....................................................................................................3
EA2000 Cable Connections ............................................................................................................3
EA2000 Exploded Assembly Diagram ............................................................................................5
EA2000 Schematic (PCB9000104).................................................................................................6
EA2000 Dimension Drawing ...........................................................................................................7
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INSTALLATION/OPERATION MANUAL
MODEL EA2000
HALF-DUPLEX EQUALIZING AMPLIFIER
1.0 WARNINGS
Priortoinstallationanduseofthisproduct,thefollowing
WARNINGS should be observed.
4. Only use replacement parts recommended by
Pelco.
1. Installation and servicing should only be done by
Qualified Service Personnel and conform to all Lo-
cal codes.
5. After replacement/repair of this unit’s electrical
components, conduct a resistance measurement
between line and exposed parts to verify the ex-
posed parts have not been connected to line cir-
cuitry.
2. Unless the unit is specifically marked as a NEMA
Type 3, 3R, 35, 4, 4X, 6 or 6P enclosure, it is de-
signed for Indoor use only and it must not be in-
stalled where exposed to rain and moisture.
3. The product may bear the following marks:
This symbol indicates that dangerous voltage
constituting a risk of electric shock is present
within this unit.
This symbol indicates that there are important
operating and maintenance instructions in the
literature accompanying this unit.
CAUTION:
RISK OF ELECTRIC SHOCK.
DO NOT OPEN.
CAUTION:
TOREDUCETHERISKOFELECTRICAL
SHOCK, DO NOT REMOVE COVER. NO
USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
Please thoroughly familiarize yourself with the information in this manual
prior to installation and operation.
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2.0 SCOPE
4.0 INSTALLATION
The information contained within this manual covers
the installation and operation of the EA2000 Half-duplex
Equalizing Amplifier.
The EA2000 is designed to be used for post equaliza-
tion only (located near the Coaxitron transmitter); use
as a pre-equalizer is not allowed.
3.0 DESCRIPTION
Figure 1 illustrates a typical system installation.
For installation, perform the following steps:
The EA2000 is a prioritized, half-duplex equalizing
amplifier intended for, but not restricted to, use with
Pelco’s Coaxitron® System 2000 control.
1. Connect the video cable from the Coaxitron re-
ceiver to the connector marked “INPUT” on the
rear panel.
In the absence of a Coaxitron control signal, the ampli-
fier functions identically to an ordinary unidirectional
equalizer, providing up tp 8 dB of flat gain and high
frequency boost of up to 18 dB at 12 MHz.
2. Connect a video cable from the connector marked
“OUTPUT” to the Coaxitron transmitter (see Fig-
ure 2).
In the presence of a control signal, the “forward” equal-
izing function is temporarily suspended while the con-
trol signal is regenerated, pre-equalized and transmitted
in the “reverse” direction.
The EA2000 is supplied with a U.L. listed wall trans-
former which plugs into a 120 VAC outlet and supplies
the 12 VAC to operate the unit.
Note that the control direction has priority over the video
direction, but that this “interruption” occupies less than
one TV line period (excluding sync pulses) and that
precautions are taken to insure that the synthetically
generated video signal during this interruption does not
contain deleterious anomolies.
5.0 OPERATION
Optimum performance is achieved if an oscilloscope
and a standard EIA resolution chart are used in making
gain and boost adjustments. The GAIN control should
be adjusted for an output level to 1 volt p-p and the L.F.
BOOST control should be adjusted for minimum tilt
during sync pulses. The H.F. BOOST control is then
adjusted for optimum resolution wedge reproduction.
The EA2000 provides a low cost, highly effective means
of maintaining CCTV picture quality in runs of up to
3,000 feet (914 m) of RG59 cable.
If the use of a resolution chart is precluded, the H.F.
BOOST control should be adjusted for maximum sharp-
ness of sync pulse edges — without overshoot.
Through panel controls provide for adjustable ampli-
fier flat gain of 1-8 dB plus adjustable high frequency
boost of from 0 to greater than 18 dB at 12 MHz.
In the absence of an oscilloscope, a less precise (but often
equally satisfactory) adjustment can be made as follows:
Applications of the EA2000 should be for post-
equalization only (located near the Coaxitron trans-
mitter); use as a pre-equalizer is not allowed.
1. Set the GAIN and BOOST controls approximately
1/3 turn from fully counterclockwise.
This desk top unit can be rack mounted using the R300
Rack Mount Kit.
2. Adjust GAIN control for satisfactory overall pic-
ture contrast.
3.1 OPTIONS
3. Adjust L.F. BOOST control for optimum detail.
Too much boost (clockwise) can cause picture in-
stability and/or smearing (trail).
R300
Rack mount kit (up to 3 units can be
racked horizontally)
4. Adjust the H.F. BOOST control to further optimize
picture detail. Note that the effectiveness of this
control is hardly perceptible unless very fine pic-
ture detail is present in the camera signal output.
An excessive setting of this control (clockwise) can,
however, increase picture noise.
2
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6.0 MAINTENANCE
Under normal operating conditions and usage, mainte-
nance of this equipment is not necessary. The EA2000
has no operator serviceable components and should be
serviced by a trained technician or returned to the fac-
tory for repair.
TERMINATE
MONITOR
COAXIAL CABLE
COAXIAL CABLE
AC INPUT
MULTI-
CONDUCTOR
CABLE
VIDEO
F1 .2 ASB
J8
J7
J6
MPT9000CZ TRANSMITTER
COAXIAL
CABLE
COAXIAL CABLE
IN
OUT
AC INPUT
OUTPUT
INPUT
12 VAC
EA2000
COAXITRON® RECEIVER
Figure 1. Typical Installation Configuration
TO TRANSMITTER
FROM RECEIVER
OUTPUT
INPUT
12VAC
Figure 2. EA2000 Cable Connections
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7.0 PARTS LIST
The following list corresponds to the exploded assembly diagram in Figure 3.
Item
Qty
Description
Part Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
2
1
2
1
1
1
1
1
4
Connector, DC power jack #16 PJ221
Connector MTA 2-position cable w/socket
Connector MTA 3-position cable w/socket
Connector, BNC CP1094ULNSD CAM00
Chassis, univ M1CA
Chassis cover, univ M1CA
Panel front, EA2000
PCB assembly, half-duplex equalizer
Panel, rear EA2000
Spacer, 1/4" hex x .375 4-40 tap
Not used
CON16PJ421
CON640428-2
CON640428-3
CONUG1094/U
M1CA4001COMP
M1CA4001COMP
PANEA4004COMP
PCB9000104ASSY
RPEA4000COMP
SPA8402
1
2
8
8
4
Lug, BNC ground
ZH1497
Screw, 2-56 x 3/16" pan slot SS
Screw, 4-40 x 1/4" pan Philips SS
Screw, 4-40 x 3/8" pan Philips Blk
Screw, 4-40 x 3/8" pan Philips SS
Washer, internal star #4 SS
ZH2-56X.187SPS
ZH4-40X.250SPP15
ZH4-40X.375BPP
ZH4-40X.375SPP
ZH4LWSIS
12
4
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8.0 EXPLODED ASSEMBLY DIAGRAM
Figure 3. EA2000 Exploded Assembly Diagram
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9.0 SCHEMATIC
Figure 4. EA2000 Schematic (PCB9000104)
6
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10.0 SPECIFICATIONS
MODEL
Cable Lengths:
Cable Type
RG59
Maximum Effective Distance
3,000 feet (914.4 m)
4,500 feet (1371.6 m)
6,000 feet (1828.8 m)
8,000 feet (2438.4 m)
EA2000
Half-duplexEqualizingVideo/Control
RG6
RG11
RG15
Amplifier. (UL)
EA2000/220
Same as EA2000 except 230 VAC
operation. (CE)
GENERAL
Environment:
32° to 122°F (0 to 48.89°C)
0-90% relative humidity
ELECTRICAL
Input:
Single (BNC) internally terminated
in 75 ohms
Dimensions:
Weight:
see Figure 5
Output:
Single (BNC) source terminated
3 lbs (1.35 kg)
Frequency
Response:
Shipping
Weight:
Adjustable from flat (±1 dB) at 12
MHz to greater than 18 dB of boost at
12 MHz
4 lbs (1.81 kg)
Construction:
Chassis
Steel, zinc plated
Gain:
Adjustable from 1–8 dB
Cover
Panel
Aluminum, black polyester powder
coat
Output
Dynamic Range: Up to 2 volts p-p at 50% APL
Up to 1.5 volts p-p at 90% APL
Aluminum, black polyester powder
coat with white silk screening
Tilt:
Less than 2%
Rating:
NEMA 1
Power Requirements
for Transformer: 1.5 vA (.125 amp) at 12 ±15% volts
RMS 50-60 Hz from a dedicated, iso-
lated source
Figure 5. EA2000 Dimension Drawing
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11.0 WARRANTY AND RETURN
INFORMATION
RETURNS
WARRANTY
In order to expedite parts returned to the factory for repair or credit, please
call the factory at (800) 289-9100 or (559) 292-1981 to obtain an
authorization number (CA number if returned for credit, and RA number
if returned for repair).
Pelco will repair or replace, without charge, any merchandise proved
defectiveinmaterialorworkmanshipforaperiodofoneyearafterthedate
of shipment.
Exceptions to this warranty are as noted below:
All merchandise returned for credit may be subject to a 20% restocking
and refurbishing charge.
•
•
Five years on FT/FR8000 Series fiber optic products.
Three years on Genex® Series products (multiplexers, server, and
keyboard).
Three years on Camclosure® and fixed camera models, except the
CC3701H-2, CC3701H-2X, CC3751H-2, CC3651H-2X, MC3651H-2,
and MC3651H-2X camera models, which have a five-year warranty.
Goods returned for repair or credit should be clearly identified with the
assigned CA or RA number and freight should be prepaid. Ship to the
appropriate address below.
•
If you are located within the continental U.S., Alaska, Hawaii or Puerto
Rico, send goods to:
Service Department
Pelco
•
•
Two years on standard motorized or fixed focal length lenses.
Two years on Legacy®, CM6700/CM6800/CM9700 Series matrix, and
DF5/DF8 Series fixed dome products.
Two years on Spectra®, Esprit®, ExSite™, and PS20 scanners, includ-
ing when used in continuous motion applications.
Two years on Esprit® and WW5700 Series window wiper (excluding
wiper blades).
3500 Pelco Way
Clovis, CA 93612-5699
•
•
•
If you are located outside the continental U.S., Alaska, Hawaii or Puerto
Rico and are instructed to return goods to the USA, you may do one of the
following:
If the goods are to be sent by a COURIER SERVICE, send the goods to:
Eighteen months on DX Series digital video recorders, NVR300
Series network video recorders, and Endura™ Series distributed
network-based video products.
Pelco
3500 Pelco Way
Clovis, CA 93612-5699 USA
•
•
One year (except video heads) on video cassette recorders (VCRs).
Video heads will be covered for a period of six months.
If the goods are to be sent by a FREIGHT FORWARDER, send the goods
to:
Six months on all pan and tilts, scanners or preset lenses used in
continuousmotionapplications(thatis,presetscan,tourandautoscan
modes).
Pelco c/o Expeditors
473 Eccles Avenue
South San Francisco, CA 94080 USA
Phone: 650-737-1700
Fax: 650-737-0933
Pelco will warrant all replacement parts and repairs for 90 days from the
date of Pelco shipment. All goods requiring warranty repair shall be sent
freight prepaid to Pelco, Clovis, California. Repairs made necessary by
reason of misuse, alteration, normal wear, or accident are not covered
under this warranty.
Pelco assumes no risk and shall be subject to no liability for damages or
loss resulting from the specific use or application made of the Products.
Pelco’s liability for any claim, whether based on breach of contract,
negligence, infringement of any rights of any party or product liability,
relating to the Products shall not exceed the price paid by the Dealer to
Pelco for such Products. In no event will Pelco be liable for any special,
incidental or consequential damages (including loss of use, loss of profit
and claims of third parties) however caused, whether by the negligence
of Pelco or otherwise.
The above warranty provides the Dealer with specific legal rights. The
Dealer may also have additional rights, which are subject to variation from
state to state.
Ifawarrantyrepairisrequired,theDealermustcontactPelcoat(800) 289-
9100 or (559) 292-1981 to obtain a Repair Authorization number (RA),
and provide the following information:
1. Model and serial number
2. Date of shipment, P.O. number, Sales Order number, or Pelco invoice
number
3. Details of the defect or problem
If there is a dispute regarding the warranty of a product which does not fall
under the warranty conditions stated above, please include a written
explanation with the product when returned.
Method of return shipment shall be the same or equal to the method by
which the item was received by Pelco.
8
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