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Megger BERT-20E1, Руководство пользователя

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TS/Channel Frequency & Level 
RX Level Measurements 
RX Frequency/Clock Slips 

PERF – PERFORMANCE RESULTS 

15

Unavailable Seconds/Available Seconds 
Degraded Minutes/Degraded Minutes Percent 
Severely Error Seconds/Severely Error Seconds Percent 
Error Seconds/Error Free Seconds 
RX Status LEDs 
TS/Channel Data Bits & Signaling Bits 

AUXILIARY MENU FUNCTIONS 

17

00 Monitor Jack Gain 
01 Test Length 
02 Error Inject Rates 
03 User Pattern [1] 
04 User Pattern [2] 
05 Time of Day 
06 Day and Date 

PRINTING RESULTS 

18

Printouts 

PRODUCT SPECIFICATIONS 

19

Symbols used on the instrument are:

F

Caution: risk of electric shock

G

Caution: refer to accompanying notes

c

Equipment complies with current EU directives.

CONTENTS

3

GETTING STARTED 

5

Software Revision 
Supplied Equipment 
Handling Precautions 
Front Panel Features 
Test Modes
Frame Structures 
Test Patterns 
Line Codes 
Auxiliary Functions 
Power 
Batteries 

CONNECTING TO THE NETWORK

10 

Connecting to a Protected Monitor Point 
Connecting to a Unprotected Monitor Point 

SELECTING OPERATING MODES 

12

NORM –Normal Mode 
AUTO – Automatic Detection Mode 
Fx56 – Fractional E1 (Nx56) Mode 
Fx64 – Fractional E1 (Nx64) Mode 
D/I – Half Duplex Drop and Insert 
TONE – Tone Insertion Mode 
LLB – Local Loop Back
TLB – Test Loop Back 
DLAY – Round Trip Loop Delay Measurement Mode 
CO64 – Co-directional Interface 64 kbps 

VIEWING TEST RESULTS 

14

NORM – Normal List of BER and Non-BER Results 
CRC Errors/CRC Error Rate 
FAS Bit Errors/E Bit Errors 
Bipolar Violation Errors & BPV Rate 
Bit Errors & Bit Error Rate 
Error Free Seconds & Percent Error Free Seconds 
Error Seconds & Severely Error Seconds 

BERT_20E1_6172-871_UG_V02  05/05/2004  8:24 am  Page 3

Содержание BERT-20E1

Страница 1: ...M BERT 20E1 2 048 Mbps Network Analyzer USER MANUAL BERT_20E1_6172 871_UG_V02 05 05 2004 8 24 am Page 1...

Страница 2: ...propriate surge and transient protection has been fitted The network and user terminals may be raised to hazardous voltages if this unit is connected to non SELV circuits This instrument should not be...

Страница 3: ...5 Software Revision Supplied Equipment Handling Precautions Front Panel Features Test Modes Frame Structures Test Patterns Line Codes Auxiliary Functions Power Batteries CONNECTING TO THE NETWORK 10 C...

Страница 4: ...cularly in environments where a convenient power supply may not be available Measurement Summary The BERT 20E1 combines BER test functions along with signal qualitymeasurement providing the ability to...

Страница 5: ...en the unit is initially powered up Supplied Equipment The BERT 20E1 is supplied with the following items A C power adapter User manual including CD ROM based E1 basics Carrying case Rubber boot Handl...

Страница 6: ...LUME controls BATTERY STAUS indicator TS CHANNEL SELECTION keys and display Stores test configuration Recalls test configuration Selects circuit termination Injects LOGIC BPV or FRAME CRC errors Power...

Страница 7: ...mode TONE Tone insert mode LLB Local loop back mode TLB Test loop back mode DLAY Round trip loop delay measurement CO64 Co directional 64kbps mode NONE No Framing P31 No multiframing P31C CRC multifr...

Страница 8: ...ITU T O 151 O 152 O 153 211 1 as per ITU T O 151 O 152 O 153 215 1 as per ITU T O 151 O 152 O 153 220 1 as per ITU T O 151 O 152 O 153 223 1 as per ITU T O 151 O 152 O 153 1 1 Alternating ones and ze...

Страница 9: ...BERT 20E1 batteries are not serviceable To recharge the batteries connect the 9 VDC power source to the DC jack located on the front panel The test set will charge during operation but it is recommen...

Страница 10: ...ction of 120 balanced data signals 120 TRANSMIT Transmitter output interface Provides 120 balanced data output EXT CLOCK IN Allows connection of a 75 timing reference as per ITU T G 811 The reference...

Страница 11: ...nuation Typically this gives a test signal 30 26 20dB down on the traffic signal Select MON monitor as your receive interface termination Next choose the appropriate MONITOR GAIN from the BERT 20E1 s...

Страница 12: ...4 Mode This mode allows the user to test in a fractional E1 environment The full 8 bits of data are available in each time slot The receiver and transmitter are manually configured for frame pattern a...

Страница 13: ...ing the logic error inject key the test set will insert a single logic error into the E1 payload At the same time a 1 millisecond counter is started and the receiver will start looking for the bit err...

Страница 14: ...E1 has achieved pattern synchronization by observing the green PATTERN SYNC LED under the RX STATUS heading on the front panel of the unit Each time the test set detects an error in the logic bit stre...

Страница 15: ...ed will be measured and the received level or amplitude will be displayed The BERT 20E1 demodulates the digitally encoded signal on the selected channel and drops the channel to the speaker The level...

Страница 16: ...rror seconds parameter is a one second interval of an available second where one or more bit errors have occurred The error free seconds parameter is a one second interval of an available second where...

Страница 17: ...to OFF The ERROR INJECT RATE menu can only be accessed when operating in the NORM AUTO F x 56 F x 64 D I LLB or TLB modes 03 User Pattern 1 The user pattern 1 is a user defined patterns that is 32 bi...

Страница 18: ...l Fx56 Fx64 LLB or TLB and the printer is correctly hooked up and configured correctly The following sample printout will be observed TEST RESULTS TIME CURRNET TIME DATE CURRENT DATE MODE NORM FRAME P...

Страница 19: ...ular DIN Custom EXT CLOCK IN 75 BNC Auxiliary Power DC power jack accepts 2 5 mm diameter female plug with center or tip and outside Receiver Modes NORM Tx follows Rx AUTO Auto Configure Rx Tx is inde...

Страница 20: ...G 706 G 823 G 732 and I 431 ETS 300 011 300 233 and 300 166 CTR12 and CTR4 Transmitter Line Code AMI or HDB3 Framing NONE PCM30 PCM30C PCM31 and PCM31C Frequency 2048000 Hz 2 5 ppm Line Coding AMI HDB...

Страница 21: ...ORM SUMMARY PERFORMANCE Clock Slips A positive number indicates that the reference clock is faster a negative number indicates that the reference clock is slower Errors Logic rrrors logic error rate B...

Страница 22: ...rsonnel The test set circuit contains static sensitive devices and care must be taken in handling the printed circuit board If the protection of a test set has been impaired it should not be used and...

Страница 23: ...23 BERT_20E1_6172 871_UG_V02 05 05 2004 8 24 am Page 23...

Страница 24: ...30 16 08 90 F 33 0 1 34 61 23 77 OTHER TECHNICAL SALES OFFICES Toronto CANADA Sydney AUSTRALIA Mumbai INDIA Madrid SPAIN and the Kingdom of BAHRAIN Megger products are distributed in 146 countries wo...

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