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