Download E1 Pseudo-Random Test Pattern Common Module

ADCP-61-133
Issue 2, January 1998
E1 Pseudo-Random Test Pattern
Common Module and Output Module
User Manual
Q20
48-
20
10466-A
Content
Page
INTRODUCTION ........................................................................... 1
Revision History ....................................................................... 2
Admonishments ....................................................................... 2
1. GENERAL ............................................................................ 2
2. FUNCTIONAL DESCRIPTION ............................................................. 2
A.
PRTP Common Module .............................................................. 3
B.
PRTP Output Module ................................................................ 4
3. PHYSICAL DESCRIPTION................................................................ 5
4. TECHNICAL DESCRIPTION .............................................................. 5
5. INSTALLATION ........................................................................ 7
6. OPERATION .......................................................................... 8
7. SYSTEM INTEGRATION SERVICES ........................................................ 8
8.
CUSTOMER SUPPORT SERVICES ........................................................ 9
INTRODUCTION
This manual provides the description, installation and operating instructions for ADC's Pseudo
Random Test Pattern (PRTP), Signal Source Common Module, Model Q2048-20, and Output
Module, Model Q2048-21. The modules operate at a bit rate of 2.048 Mb/s.
2-42932-2072
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© 1998, ADC Telecommunications, Inc.
ADCP-61-133
Issue 2, January 1998
Revision History
ISSUE
DATE
REASON FOR CHANGE
Issue 1
01//92
Original.
Issue 2
01/98
Reformatted to comply with current standards, photos converted to line art.
Admonishments
Important safety admonishments are used throughout this manual to warn of possible hazards to
persons or equipment. An admonishment identifies a possible hazard and then explains what may
happen if the hazard is not avoided. The admonishments — in the form of Dangers, Warnings,
and Cautions — must be followed at all times. These warnings are flagged by use of the
triangular alert icon (seen below), and are listed in descending order of severity of injury or
damage and likelihood of occurrence.
Danger: Danger is used to indicate the presence of a hazard that will cause severe
personal injury, death, or substantial property damage if the hazard is not avoided.
Warning: Warning is used to indicate the presence of a hazard that can cause severe
personal injury, death, or substantial property damage if the hazard is not avoided.
Caution: Caution is used to indicate the presence of a hazard that will or can cause
minor personal injury or property damage if the hazard is not avoided.
1. GENERAL
The Common Module provides 10 PRTP outputs and the future optional Output Module
1.01
provides 20 PRTP outputs. A Common Module may control either one Output Module (30
outputs) or two Output Modules (50 outputs).
2. FUNCTIONAL DESCRIPTION
2.01
The E1 (2.048 Mb/s) PRTP performs the following functions:
•
Provides a controlled error-free test signal used during troubleshooting.
•
Provides a far-end office with a standard signal source for bit error-rate measurements.
•
Provides testing signals for spans thought to be marginal.
•
Drives unassigned lines.
•
Drives idle lines during system turn-up or span line rearrangements.
•
Drives maintenance and backbone lines.
Two PRTP Common Modules and four Output Modules can be mounted in ADC's
2.02
Model M1544-100 QRSS/Bridging Repeater Mounting Shelf. Altogether, they provide a total of
100 PRTP outputs. The QRSS/Bridging Repeater Mounting Shelf also provides eight (8)
mounting slots for Bridging Repeaters.
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 1998, ADC Telecommunications, Inc.
ADCP-61-133
Issue 2, January 1998
A. PRTP Common Module
The PRTP Common Module, (block diagram shown in Figure 1) generates a signal
2.03
32767 bits in length and is limited to three zeros with HDB3 or 14 zeros without. A full range of
mark/space combinations is used to simulate the energy spectrum of an E1 line.
The Common Module provides ten (10) outputs via wire-wrapped terminals at the rear of
2.04
the mounting shelf. It also provides the signal bit data to the first optional Output Module.
The 48 Volt dc office battery power is fed through a Amp. GMT alarm type fuse, on the
2.05
Common Module, into a 48 to 5 Volt dc to dc converter. Most of the Common Module circuitry
is powered from the 5 Vdc supply. The analog portion of the alarm circuitry for both modules is
powered from the 48 Vdc office battery. The two optional Output Modules associated with the
Common Module are also powered from the Common Module. The 48 Vdc office battery input
is connected to a terminal block on the rear of the mounting shelf.
The Common Module LED and its alarm relay contacts provide the essential alarm
2.06
functions. The LED is illuminated and the alarm relay releases under the following conditions:
•
Front panel fuse operates.
•
Loss of internal 5 Vdc supply.
•
Faulty PCM bit stream.
The Common Module alarm relay only (LED is not illuminated) releases under the following
conditions:
•
Input (48 Vdc) office battery fails.
•
Alarm signal from either optional Output Module.
•
Bridging Repeater alarm.
Note: The ADC M1544-100 also provides mounting slots for eight ADC Bridging
Repeaters.
The alarm relay, in the normal position (operated), furnishes a dry contact alarm
2.07
interface with Normally Open" (NO) or Normally Closed" (NC) contacts for alarm leads. These
alarm lead terminals appear on a terminal block, at the rear of the mounting shelf, for connection
to a local alarm system.
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 1998, ADC Telecommunications, Inc.
ADCP-61-133
Issue 2, January 1998
RAIL 2
E1 CLOCK
CLOCK
CIRCUITRY
DOUBLE RAIL
CONVERTER
FAST
CLOCK
3 ZERO
DETECTOR
15 BIT SHIFT
REGISTER
FEEDBACK
LOGIC
15 ZERO
DETECTOR
PATTERN
LOGIC
RAIL 1
TO
OUTPUT
MODULE
QRW
OUTPUT SHIFTING
RAIL 1
BIPOLAR
OUTPUT
DRIVERS
E1
OUTPUTS
OUTPUT SHIFTING
RAIL 2
RAIL 1 TO OUTPUT MODULE
RAIL 2 TO OUTPUT MODULE
ALARM
CIRCUITRY
–48V IN
GND IN
RELAY CONTACTS
–5V
OUTPUT MODULE 1 ALARM
POWER
CONVERTER
GND
OUTPUT MODULE 2 ALARM
BOR ALARMS
TO ALARM
FAIL
LAMP
10467-A
Figure 1. Common Module Block Diagram
B. PRTP Output Module
One of the two optional Output Modules is depicted in Figure 2. Each Output Module
2.08
provides 20 PRTP outputs. A Common Module can control one or two Output Modules.
Altogether a total of 50 PRTP outputs are provided via wire-wrapped terminals at the rear of the
mounting shelf, per common module group.
The first Output Module receives its signal bit data from the output of the Common
2.09
Module and the second Output Module receives its signal bit data from the first Output Module.
The Output Modules are powered by the 5 Vdc supply from the Common Module and
2.10
the alarm circuit is powered from 48 Volt battery.
The alarm circuitry is the same as in the Common Module except that the Output
2.11
Module alarm signal is sent back to the Common Module alarm relay. The Output module LED
is illuminated and an alarm signal occurs under the following conditions:
•
Loss of the 5 Vdc.
•
Faulty PCM bit stream.
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 1998, ADC Telecommunications, Inc.
ADCP-61-133
Issue 2, January 1998
FAST CLOCK
RAIL 1 INPUT
RAIL 2 INPUT
OUTPUT SHIFTING
RAIL 1
E1
OUTPUTS
BIPOLAR
OUTPUT
DRIVERS
OUTPUT SHIFTING
RAIL 2
RAIL 1 (BIT FOLLOWING 20TH OUTPUT)
RAIL 1 (BIT FOLLOWING 20TH OUTPUT)
TO COMMON
MODULE ALARM/RELAY
ALARM
CIRCUITRY
GND IN
–5V IN
–48V IN
FAIL
LAMP
TO ALARM
10468-A
Figure 2. Output Module Block Diagram
3. PHYSICAL DESCRIPTION
The PRTP Common Module and optional Output Module are plug-in printed circuit
3.01
cards, attached to a front panel, that mount in an ADC QRSS/Bridging Repeater Mounting Shelf,
Model M1544-100. The front panel also has a pull-out handle.
ADC equipment is identified by a model and part number on the front panel or located
3.02
elsewhere on the equipment.
3.03
The overall dimensions of the module are:
Common Module: 25.7 9.4 1.5 cm
(10.1 3.7 0.6 inches)
Output Module: 25.7 9.4 1.5 cm
(10.0 3.7 0.6 inches)
4. TECHNICAL DESCRIPTION
4.01
The Common and Output Modules specifications are listed in Table 1.
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 1998, ADC Telecommunications, Inc.
ADCP-61-133
Issue 2, January 1998
Table 1. Specifications
PARAMETER
SPECIFICATION
REMARKS
Outputs
Output Signal:
PRTP Format
Meets CCITT G.703
32767 bit sequence
E1 Pulse Format:
Rate of 2.048 Mbps ± 80 bps
Pulse Width:
244 nsec ± 25 nsec
Pulse Width Unbalance:
Positive and negative pulse
width ratio between 0.95 to 1.05.
45 nsec maximum.
3 Volts ± .3 Volts Mid pulse
Positive and negative pulse
amplitude ratio between 0.95 to
1.05.
67.05 m (0 to 220 feet)
Rise/Fall Times:
Pulse Amplitude:
Pulse Amplitude Unbalance:
Driving Distance
Generated by a 15 bit shift
register with bits 14 and 15 fed
back. 14 zeros max. with AMI, 3
zeros max. with HDB3.
Bipolar alternate mark inversion:
50% duty cycle.
Note: Output parameters apply
to E1 outputs with a nominal
load of 120 ohms.
Measured from 50% crossing of
rising edge to 50% crossing of
falling edge of pulse.
22 AWG shielded twisted pair
cable.
Environmental
Power Requirements
Supply Voltage:
Supply Current:
Common Module Alone:
Common Module +1
Output Module:
Common Module 2
Output Modules:
Fuse:
Ambient Temperature
Operating:
Storage:
Relative Humidity:
Operating:
Storage:
–42 to –56 Vdc.
100 mA.
135 mA.
170 mA.
/ Ampere.
1 2
0° C to +50° C
(+32° F to +122° F)
–40° C to +70° C
(–40° F to +158° F)
20 to 80% (no condensation)
5 to 95% (no condensation)
Physical Description
Dimensions:
Common Module:
Output Module:
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 1998, ADC Telecommunications, Inc.
25.7 × 9.4 × 1.5 cm
(10.1 × 3.7 × 0.6 inches)
25.7 × 9.4 × 1.5 cm
(10.1 × 3.7 × 0.6 inches)
1/2 A fuse required for the onboard DC/DC converter used.
ADCP-61-133
Issue 2, January 1998
5. INSTALLATION
Warning: Never install telephone equipment in a wet location or during a lightning
storm. When installing or modifying telephone lines, disconnect lines at the network
interface before working with uninsulated lines or terminals.
The PRTP Common Module mounts in position nine (9) and/or position twelve (12) of
5.01
thePRTP/Bridging Repeater Mounting Shelf.
The optional PRTP Output Modules mount in positions ten (10), eleven (11), thirteen
5.02
(13), and fourteen (14). The Output Modules in positions 10 and 13 are driven by the Common
Modules in positions 9 and 12 respectively. The Output Modules in positions 11 and 14 are
driven by the Output Modules in positions 10 and 13 respectively.
5.03
PRTP applications only require a common module (10 outputs).
The PRTP is factory shipped optioned for HDB3 operation. Figure 3 shows jumper
5.04
option position for HDB3 or AMI operation.
To install the Common Module, proceed as follows: Slide the keyed card into place in
5.05
the mounting position and make sure it is firmly firmly seated. Electrical, circuit and alarm
connections are established by plug-in contacts at the rear of the printed circuit card. Channel
guides assure proper alignment of the card and positive connections of the contacts. If there is
excessive resistance, remove the module and check for improper alignment or obstructions.
Terminate all unused PRTP outputs with 100 or 120 ohm watt resistors. This may be
5.06
accomplished by wiring 100 or 120 ohm resistors to the PRPT output jacks using ADC's Resistor
Panel Assembly, Part Number 4-26232-0010, (see Figure 4 for the wiring diagram). The Resistor
Panel Assembly provides fifty watt 100 ohm resistors secured to wire-wrap terminal block pins
and mounted on a 19-inch panel suitable for relay rack installation. Another method of terminating
the unused PRTP output jacks is by inserting 120 ohm resistor plugs in the output jacks.
AMI
HDB3
10469-A
Figure 3. HDB3/AMI Jumper Option
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 1998, ADC Telecommunications, Inc.
ADCP-61-133
Issue 2, January 1998
RESISTANCE
PANEL
A
T
B
T
R
R
PRTP
OUTPUT
DSX-1
MISC. JACKFIELD
100/120 Ω
S
10470-A
Figure 4. Resistance Panel Wiring Diagram
6. OPERATION
There are no operating instructions to initiate the operation of the Common and Output
6.01
Modules. The modules are operational as soon as they are installed in the mounting shelf and
power is applied.
7. SYSTEM INTEGRATION SERVICES
ADC offers the following system integration services. For calls originating in the U.S.A.
7.01
or Canada, dial 1-800-366-3891, extension 3000. For calls originating outside the U.S.A. or
Canada, dial 612-946-3000.
Technical Assistance Center
•
•
•
•
•
•
•
•
•
•
•
Technical Training
• Product Technology
• Custom Designed Training
Technical Operations
• Detail Engineering
• End-to-End Installation
• Drafting Services
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 1998, ADC Telecommunications, Inc.
Product Management
Project Engineering
Project Administration
Network Design
Broadband Design (RF Design and Strand Mapping)
Integration Network Testing
Network Monitoring (Upstream or Downstream)
Power Monitoring
Remote Surveillance
System Turn-Up and Test
Service/Maintenance Agreements
ADCP-61-133
Issue 2, January 1998
8. CUSTOMER SUPPORT SERVICES
8.01
ADC offers the following customer support services. For calls originating in the U.S.A.
or Canada, dial 1-800-366-3891, then request the extension listed. For calls originating outside
the U.S.A. or Canada, dial 612-946-3475 or 612-946-3000.
BCG Technical Assistance Center
Extension 3475
E-Mail: [email protected]
•
•
•
•
•
•
•
•
Technical Information
System/Network Configuration
Product Specification
Product Application
Training
Installation and Operation Assistance
Troubleshooting and Repair
Field Assistance
Sales Administration
Extension 3000
•
•
•
•
Quotation Proposals
Ordering
Delivery
General Product Information
Product Return Department
Extension 3000
E-Mail: repair&[email protected]
• ADC Return Authorization number and instructions
must be obtained before returning products.
8.02
Product information and service can also be obtained by writing ADC Telecommunications,
Inc., P.O. Box 1101, Minneapolis, Minnesota 55440-1101, U.S.A.
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior
notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits
and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar
damages. This disclaimer of liability applies to all products, publications and services during and after the
warranty period.
This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891,
extension 3223 (in U.S.A. or Canada) or 612-946-3223 (outside U.S.A. and Canada), or by writing to ADC Telecommunications,
Inc., Attn: Technical Assistance Center, Mail Station #77, P.O. Box 1101, Minneapolis, MN 55440-1101, U.S.A.
© 1998, ADC Telecommunications, Inc.
All Rights Reserved
Printed in U.S.A.
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