Pelco EA2000 User Manual

®

EA2000

Half-Duplex Equalizing Amplifier

Installation/Operation Manual

C632M (2/88)

Pelco • 3500 Pelco Way, Clovis, CA 93612-5699 • USA • [phone] or (1-559) 292-1981

FAX [phone] or (1-559) 292-3827

International customers call (1-559) 292-1981 or FAX [phone]

TABLE OF CONTENTS

Section Page

1.0 WARNINGS ........................................................................................................................................1

2.0 SCOPE ............................................................................................................................................... 2

3.0 DESCRIPTION ................................................................................................................................... 2

3.1 OPTIONS..................................................................................................................................2

4.0 INSTALLATION .................................................................................................................................. 2

5.0 OPERATION ......................................................................................................................................2

6.0 MAINTENANCE ................................................................................................................................. 3

7.0 PARTS LIST .......................................................................................................................................4

8.0 EXPLODED ASSEMBLY DIAGRAM ..................................................................................................5

9.0 SCHEMATIC ......................................................................................................................................6

10.0 SPECIFICATIONS .............................................................................................................................. 7

11.0 WARRANTY AND RETURN INFORMATION.....................................................................................8

®Pelco and the Pelco logo are registered trademarks of Pelco.
©Copyright 1988, Pelco. All rights reserved.

ii Pelco Manual C632M (2/88)

LIST OF ILLUSTRATIONS

Figure Page

1 Typical Installation Configuration .................................................................................................... 3

2 EA2000 Cable Connections ............................................................................................................3

3 EA2000 Exploded Assembly Diagram ............................................................................................ 5

4 EA2000 Schematic (PCB9000104) ................................................................................................. 6

5 EA2000 Dimension Drawing ........................................................................................................... 7

Pelco Manual C632M (2/88) iii

(This page intentionally left blank.)

iv Pelco Manual C632M (2/88)

INSTALLATION/OPERATION MANUAL
MODEL EA2000
HALF-DUPLEX EQUALIZING AMPLIFIER

1.0 WARNINGS

Prior to installation and use of this product, the following
WARNINGS should be observed.

1. Installation and servicing should only be done by
Qualified Service Personnel and conform to all Lo­cal codes.

2. Unless the unit is specifically marked as a NEMA
Type 3, 3R, 35, 4, 4X, 6 or 6P enclosure, it is de­signed for Indoor use only and it must not be in­stalled 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.

4. Only use replacement parts recommended by
Pelco.

5. After replacement/repair of this unit’s electrical
components, conduct a resistance measurement
between line and exposed parts to verify the ex­posed parts have not been connected to line cir­cuitry.

This symbol indicates that there are important
operating and maintenance instructions in the

literature accompanying this unit.

CAUTION:

TO REDUCE THE RISK OF ELECTRICAL
SHOCK, DO NOT REMOVE COVER. NO
USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.

RISK OF ELECTRIC SHOCK.

CAUTION:

DO NOT OPEN.

Please thoroughly familiarize yourself with the information in this manual

prior to installation and operation.

Pelco Manual C632M (2/88) 1

2.0 SCOPE

4.0 INSTALLATION

The information contained within this manual covers
the installation and operation of the EA2000 Half-duplex
Equalizing Amplifier.

3.0 DESCRIPTION

The EA2000 is a prioritized, half-duplex equalizing
amplifier intended for, but not restricted to, use with
Pelco’s Coaxitron

®

System 2000 control.

In the absence of a Coaxitron control signal, the ampli­fier 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.

In the presence of a control signal, the “forward” equal­izing function is temporarily suspended while the con­trol signal is regenerated, pre-equalized and transmitted
in the “reverse” direction.

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.

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.

Through panel controls provide for adjustable ampli­fier flat gain of 1-8 dB plus adjustable high frequency
boost of from 0 to greater than 18 dB at 12 MHz.

Applications of the EA2000 should be for post­equalization only (located near the Coaxitron trans­mitter); use as a pre-equalizer is not allowed.

This desk top unit can be rack mounted using the R300
Rack Mount Kit.

3.1 OPTIONS

R300 Rack mount kit (up to 3 units can be

racked horizontally)

The EA2000 is designed to be used for post equaliza­tion only (located near the Coaxitron transmitter); use
as a pre-equalizer is not allowed.

Figure 1 illustrates a typical system installation.

For installation, perform the following steps:

1. Connect the video cable from the Coaxitron re­ceiver to the connector marked “INPUT” on the
rear panel.

2. Connect a video cable from the connector marked
“OUTPUT” to the Coaxitron transmitter (see Fig­ure 2).

The EA2000 is supplied with a U.L. listed wall trans­former which plugs into a 120 VAC outlet and supplies
the 12 VAC to operate the unit.

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.

If the use of a resolution chart is precluded, the H.F.
BOOST control should be adjusted for maximum sharp­ness of sync pulse edges — without overshoot.

In the absence of an oscilloscope, a less precise (but often
equally satisfactory) adjustment can be made as follows:

1. Set the GAIN and BOOST controls approximately
1/3 turn from fully counterclockwise.

2. Adjust GAIN control for satisfactory overall pic­ture contrast.

3. Adjust L.F. BOOST control for optimum detail.
Too much boost (clockwise) can cause picture in­stability and/or smearing (trail).

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 pic­ture detail is present in the camera signal output.
An excessive setting of this control (clockwise) can,
however, increase picture noise.

2 Pelco Manual C632M (2/88)

6.0 MAINTENANCE

Under normal operating conditions and usage, mainte­nance 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 fac­tory for repair.

TERMINATE
MONITOR

COAXIAL CABLE

COAXIAL CABLE

AC INPUT

F1 .2 ASB

MPT9000CZ TRANSMITTER

VIDEO

J8 J7 J6

COAXIAL
CABLE

OUTPUT INPUT

12 VAC

COAXIAL CABLE

AC INPUT

IN OUT

EA2000

COAXITRON® RECEIVER

Figure 1. Typical Installation Configuration

TO TRANSMITTER FROM RECEIVER

OUTPUT INPUT

MULTI­CONDUCTOR
CABLE

12 VAC

Figure 2. EA2000 Cable Connections

Pelco Manual C632M (2/88) 3

7.0 PARTS LIST

The following list corresponds to the exploded assembly diagram in Figure 3.

Item Qty Description Part Number

1 1 Connector, DC power jack #16 PJ221 CON16PJ421
2 2 Connector MTA 2-position cable w/socket CON640428-2
3 1 Connector MTA 3-position cable w/socket CON640428-3
4 2 Connector, BNC CP1094ULNSD CAM00 CONUG1094/U
5 1 Chassis, univ M1CA M1CA4001COMP
6 1 Chassis cover, univ M1CA M1CA4001COMP
7 1 Panel front, EA2000 PANEA4004COMP
8 1 PCB assembly, half-duplex equalizer PCB9000104ASSY

9 1 Panel, rear EA2000 RPEA4000COMP
10 4 Spacer, 1/4" hex x .375 4-40 tap SPA8402
11 Not used
12 1 Lug, BNC ground ZH1497
13 2 Screw, 2-56 x 3/16" pan slot SS ZH2-56X.187SPS
14 8 Screw, 4-40 x 1/4" pan Philips SS ZH4-40X.250SPP15
15 8 Screw, 4-40 x 3/8" pan Philips Blk ZH4-40X.375BPP
16 4 Screw, 4-40 x 3/8" pan Philips SS ZH4-40X.375SPP
17 12 Washer, internal star #4 SS ZH4LWSIS

4 Pelco Manual C632M (2/88)

8.0 EXPLODED ASSEMBLY DIAGRAM

Figure 3. EA2000 Exploded Assembly Diagram

Pelco Manual C632M (2/88) 5

9.0 SCHEMATIC

J2

+10

Q7

3638

1K

R34

R13

5.6K

C20

22Pf

Q8

330

R38

R36

33K

R37

R54

3.3K

+

C19

R52

3.3K

510

R39

47K

R40

GAIN

2

J3

OUTPUT
2

C17

+

R21

CR5

R32

6516

100

100/25V

CR8

C24

CW

R56

1

1

R26

75

22K

Q9

+

1000

470

R31

C25

+

3565

500

+

16V

C23

33

100

34

U2

3.3

R51

R46

R24

R23

Q6

3.3

R41

6.8K

25V

510

R2B

2.2K

2.2K

3565

35V

LO

27K

R55

R45

Q3

2.2K

Q1

R22

5.6K

10K

R10

C

Q4

CR7

CW

BOOST

220

100

3640

Q2

3565

R33

5

6516

R42

R43

100

R35

Q12

R44

R8

1.2K

R12

R11

1K

3565

C21

10K

560

5K

R27

3565

10K

680K

R53

.01

C

1K

R25

+

2.7K

.002

R20

HI

4.7K

C12

100/25V

C18

0.1/35V

.01

C14

C16

500

BOOST

+

220Pf

CW

Q11

C22

R49

CR6

2

U2

6516

+10

U4

C8

2

1/35V

C

4

R4

47K

C9

R5

18K

5

10

15

U4

+

14

C

1/35V

12

R19

10K

Q5

6516

R18

10K

1K

R16

14 538

14 538

11

R15

C11

C15

470K

9

.001

.001

Q

N/C

Q

R17

3

CR6

CR5

13

1K

UNLESS

7

1

NOTE: ALL DIODES IN914

R1

10K

10K

11

C

U2

10

R3

10K

12

Q

10

U3

C

4013

11

8

6

C

U2

9

C7

4 0 66

.001

OUT

VR1

IN

R6

+10

7810

47K

CR4

J1

R7

CR3

IN 4005

680

C13

+

C3

+

IN 4005

1

12 VAC

33

470

LEDI

25V

35V

CR1

IN 4005

CR2

IN 4005

C2

.01

C1

.01

2

3

13

1

22K

R14

12

R2

13

Q

Q

8

4

S

D

9

4

.002

75

R50

75

Q10

R47

6516

2

1

Q

6

S

U3

D

C

4013

3

5

R30

4.7K

R48

75

3.9K

R29

R29

75K

U1

10K

3

U1

4 0 11U14 0 11

4 0 11

U1

4 0 11

INPUT

Figure 4. EA2000 Schematic (PCB9000104)

6 Pelco Manual C632M (2/88)

10.0 SPECIFICATIONS
MODEL

EA2000 Half-duplex Equalizing Video/Control

Amplifier. (UL)

EA2000/220 Same as EA2000 except 230 VAC

operation. (CE)

ELECTRICAL

Input: Single (BNC) internally terminated

in 75 ohms

Cable Lengths:

Cable Type Maximum Effective Distance

RG59 3,000 feet (914.4 m)
RG6 4,500 feet (1371.6 m)
RG11 6,000 feet (1828.8 m)
RG15 8,000 feet (2438.4 m)

GENERAL

Environment: 32° to 122°F (0 to 48.89°C)

0-90% relative humidity

Dimensions: see Figure 5

Output: Single (BNC) source terminated

Frequency
Response: Adjustable from flat (±1 dB) at 12

MHz to greater than 18 dB of boost at
12 MHz

Gain: Adjustable from 1–8 dB

Output
Dynamic Range: Up to 2 volts p-p at 50% APL

Up to 1.5 volts p-p at 90% APL

Tilt: Less than 2%

Power Requirements
for Transformer: 1.5 vA (.125 amp) at 12 ±15% volts

RMS 50-60 Hz from a dedicated, iso­lated source

Weight: 3 lbs (1.35 kg)

Shipping
Weight: 4 lbs (1.81 kg)

Construction:

Chassis Steel, zinc plated

Cover Aluminum, black polyester powder

coat

Panel Aluminum, black polyester powder

coat with white silk screening

Rating: NEMA 1

Figure 5. EA2000 Dimension Drawing

Pelco Manual C632M (2/88) 7

11.0 WARRANTY AND RETURN
INFORMATION

WARRANTY

Pelco will repair or replace, without charge, any merchandise proved
defective in material or workmanship for a period of one year after the date
of shipment.

Exceptions to this warranty are as noted below:

• Five years on FT/FR8000 Series fiber optic products.

• Three years on Genex

keyboard).

• Three years on Camclosure

CC3701H-2, CC3701H-2X, CC3751H-2, CC3651H-2X, MC3651H-2,

®

Series products (multiplexers, server, and

®

and fixed camera models, except the

and MC3651H-2X camera models, which have a five-year warranty.

• Two years on standard motorized or fixed focal length lenses.

• Two years on Legacy

DF5/DF8 Series fixed dome products.

• Two years on Spectra

ing when used in continuous motion applications.

• Two years on Esprit

wiper blades).

•

Eighteen months on DX Series digital video recorders, NVR300
Series network video recorders, and Endura

®

, CM6700/CM6800/CM9700 Series matrix, and

®

, Esprit®, ExSite™, and PS20 scanners, includ-

®

and WW5700 Series window wiper (excluding

™

Series distributed

network-based video products.

• One year (except video heads) on video cassette recorders (VCRs).

Video heads will be covered for a period of six months.

• Six months on all pan and tilts, scanners or preset lenses used in

continuous motion applications (that is, preset scan, tour and auto scan
modes).

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.

If a warranty repair is required, the Dealer must contact Pelco at (800)289­9100 or [phone] 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.

RETURNS

In order to expedite parts returned to the factory for repair or credit, please
call the factory at [phone] or [phone] to obtain an
authorization number (CA number if returned for credit, and RA number
if returned for repair).

All merchandise returned for credit may be subject to a 20% restocking
and refurbishing charge.

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:

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:

If the goods are to be sent by a FREIGHT FORWARDER, send the goods
to:

Service Department
Pelco
3500 Pelco Way
Clovis, CA 93612-5699

Pelco
3500 Pelco Way
Clovis, CA 93612-5699 USA

Pelco c/o Expeditors
473 Eccles Avenue
South San Francisco, CA 94080 USA
Phone: [phone]
Fax: [phone]

8 Pelco Manual C632M (2/88)