Description
Overview
GAOTek handheld and battery-operated Data Transmission Analyzer and E1/T1 BER Tester is a communication test set which can be used for E1 digital circuit, DDN and error bit test for data communication system with the transport fiber. This data transmission analyzer is designed for frame synchronization code monitoring, CRC monitoring, offline error testing, signal waveform analysis, IP PING testing, offline and online monitoring and ITU-T G.703 error analysis. This tester has testing functions for G.703, V.24/RS-232, V.35, V.36/RS-449, X.21, EIA-530 A/530 A, end-to-end testing, voice and frequency measurement, remote loopback testing, E1 pulse mask, and PING testing. It also supports RJ45 network interface and complete TCP/IP.
Key Features
- Simultaneous monitoring of dual-E1 or T1 circuit
- Opening and maintenance of 2M circuit
- Frame word, Signaling and time slot data viewing
- Color TFT LCD
- Various errors insertion and detection, such as bit, Code, FAS, CRC
- Use PC to perform the remote control of the test set through Ethernet
- Large capacity Li-ion battery guarantees 8 hours continuous operation
- Large data storage, 5000 records
Technical Specifications
Testing Interface Index | |
Internal Clock | 2048 KHz±5 PPM |
Signal Code | HDB3/AMI/B8ZS |
Signal Interface | ITU-T G.703 |
Test Pattern | PRBS 2n-1 (n=6,9,11,15,20,23) |
Tx | BNC 75Ω Unbalanced, RJ48
120 Ω Balanced |
Rx | BNC 75Ω Unbalanced
High impedance > 2k Ω, RJ-48 120 Ω Balanced High impedance > 2 kΩ |
General specifications | |
Interface | RJ-45, DC Power |
Data Storage | More than 5000 records |
Operation Mode | Keyboard |
Operation Time | 8 hours |
Display | 4” TFT LCD, 320 x 240 |
Weight | 3.3 lbs. (1.5 kg) |
Dimension | 7.48 in x 4.25 in x 1.97 in (190 mm x 108 mm x 50 mm) |
Humidity | 5 % to 95 % |
Operating Temperature | 14 ˚F to 122 ˚F (-10 ˚C to + 50 ˚C) |
Storage Temperature | -40 ˚F to 158 ˚F (-40 ˚C to + 70 ˚C) |
Configuration Options
Power Supply
GAOTek Data Transmission Analyzer and E1/T1 BER Tester supports two power supply modes, DC and battery, with a built-in large capacity rechargeable lithium battery for 8-hour long consecutive operation after being fully charged.
When using external power supply, the battery will charge automatically with the battery capacity shown on the right top corner of LCD at any moment. When using AC power, please use the AC charger accompanied, or the instrument will be damaged.
Self-Test
In order to guarantee a reliable test result, we suggest you to have a self-test according to the following steps each time before switching on for testing.
Step | Operation | Description |
1 | Power On | One slight click of “Pwr” key with Beep tone and after 10 odd seconds, enters the main menu. |
2 | Check Battery Capacity | If Battery Capacity shown on the first row of LCD indicates insufficiency, in this case you should use the AC Charger accompanied with the instrument to supply electricity. |
3 | Initialization Self-Check | In the main menu, enter the “System” menu, select “Self-Test” and after 10 odd seconds, self-Test result is displayed on LCD, with “OK!” as having been passed. |
Operation Keys
Abbreviation
All tests can be done according to the key-operation on the screen. All of the abbreviations used are listed as following for your reference.
Acronym | Meaning |
LOS | Loss of signal |
AIS | Alarm indication signal |
LOF | Loss of frame |
LOMF | Loss of Multi-frame |
LOP | Loss of Pattern |
RDI | Remote defect Indication |
FAS | Frame Alignment Signal |
CAS | Channel associated signaling |
CRC | Cyclic Redundancy Check |
EB | Error Block |
BBE | Background Block Error |
PCM30C | PCM30 CRC |
PCM31C | PCM31 CRC |
PRBS | Pseudo Random Bit Sequence |
TSE | Time Slot Error Bit |
ES | Error Second |
SES | Severely Error Second |
EFS | Error Free Seconds |
UAS | Unavailable Second |
DTE | Data Terminal Equipment |
DCE | Data Communication Equipment |
Interface Description
The above picture is the left interface diagram, in which BNC interfaces on both sides are G.703 E1 unbalanced interfaces with the impedance as 75Ω, L1-RX representing input of L1 and L1-TX representing output of L1; the middle interface is G.703 E1 balanced interface with the impedance as 120Ω(E1/G.703 64K) or 100Ω(T1) including input & output
The right interface, in which BNC interfaces on both sides are G.703 E1 unbalanced interfaces with the impedance as 75Ω, L2-RX representing input of L2 and L2-TX representing output of L2 the middle interface is a 10M/100M RJ45 network interface
The below diagram is the top interface diagram
Functions:
G.703 E1 testing
- Dual E1 in-service monitoring
- Alarm generation and error insertion
- E1 pulse mask
- Voice and frequency measurement
- Slip code testing
- Performance analysis according to ITU-T recommendation
G.703 64K testing
- 64K out of service testing
- Alarm generation and error insertion
- Performance analysis according to ITU-T recommendation
G.703 T1 test
- Alarm Event
- Error BIT Count/Rate
- RX-CLK/Frequency Test
- 821 (BIT) Test
- 826 (CRC) Test
- 826 (OOF) Test
- M2100 (CRC) Test
- M2101 (CRC) Test
- Error Injection Test
- Alarm Injection Test
- Delay Measurement
- APS Measurement
V series interfaces testing
- 24/RS-232, V.35, V.36/RS-449, EIA-530/530 A, X.21 interface BER testing
- Performance analysis according to ITU-T recommendation
PING testing
- IP address setting
- Ethernet connectivity testing
Typical Applications
- 2M Circuit Opening- Off-line loopback testing
- 2M Circuit Opening- offline end-to-end testing
- Network Maintenance- 2M online testing
- Network maintenance- 2M pass through test
- Circuit opening- 64K offline loopback testing
- Circuit- 64K offline end-to-end testing
- Network maintenance—V series interfaces testing
- Circuit opening–T1offline end-to-end testing
- Circuit–T1 offline loopback testing
- Signal quality testing—E1/T1 pulse template
- Test occupied channel—Voice Monitoring
- Test equipment A/D transfer ability—Audio Testing
- Verify Ethernet Connectivity—Ping testing
Data Management System
Through RJ-45 Network Interface, operation and data exchange can be available in the Data Management System.
Introduction
Data Management System can achieve all functions between Computer and BER communication.
Through Data Management System software, computer can extract all test data in the memorizer, and saved in the Hard Discs of computer. Standard interface for database is available, which help manage data.
It can emulate manual operation in the platform, control this instrument, and carry on all operation through Mouse.
Work Environment
A necessary Configuration is as follows,
CPU | Pentium III 733 or above, IBM PC or compatible computer |
Memory | 256 M or larger |
Hard Discs | Residual storage: more than 100 M |
Screen | At least 800 × 600 16 colors or more |
DVD Drive | 16x or above |
Network Interface | At least one network interface |
System | Windows 2000/XP |
Connection
Through RJ-45 network interface, Data Transmission Analyzer and E1/T1 BER Tester connects PC directly.
Record Operation
When data comes in memorizer, you can click “Read Records” to operate. The extracted records will display in the bars, to save it by click, or you can click “Exit” to exit the system.
EXCEL and TXT format are available for the storage.
Summary of Faults
Faults | Cause | Methods |
Fail to switch on | Battery electricity exhausted | Connect the external power to charge the battery for several minutes prior to startup |
Abnormal Keystroke Function | Shift key clicked | Click Shift key |
In the PCM30 of in-service monitoring, “LOF” alarm bright | System set as PCM31 | Set the test system as PCM31 for the tester
|
LOS alarm light bright | No Input signal | Check the input cable |
Alarm or error existing always | The instrument is in the state of error or alarm insertion. | Cancel the status of error or alarm insertion. |
Errors appear all the time in the in-service Monitoring. | Test mode selected as BER Mode
|
Select the test mode as “Live” mode in “Config”. |
When connected with network cable, Ping is not OK. | Not used cross-over network cable. Not set IP Address correctly |
Use the cross-over network cable allocated by the factory Set IP Address correctly |
There are faults with unknown causes | Possibly caused by the confusion of settings. | Switch off once and switch on again.
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