VeEX TX50e Guide

TX50e e-Manual

Table of Contents

1 About the analyzer

2 Technical specifications

2.1 Output Line interface

2.3 Input Line interface

2.4 Transmitter

2.5 Receiver

2.6 Results

2.7 LED indication

2.8 Software Features

2.9 Hardware platform

3 General Description

3.1 Main Parts

3.1.1 Front panel

3.1.2 LED indicators description

3.1.3 Keyboard description

3.2 Specifications of the analyzer's components

3.2.1 Power supply unit

3.2.2 USB cable

4 Preliminary steps

5 Operation

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5.1 Main menu

5.2 Line interface

5.2.1 Mode

5.2.2 Frame structure

5.2.3 CRC-4

5.2.4 Line code

5.2.5 Transmitter synchronization

5.2.6 Long haul

5.2.7 Deviation

5.2.8 Test speed

5.2.9 Protective resistors

5.3 Test pattern

5.3.1 Send pattern

5.3.2 Type

5.3.3 Byte 1, Byte 2, Byte 3

5.3.4 Invert RX

5.3.5 Invert ТХ

5.4 Voice functions

5.4.1 Voice functions measurements

5.4.2 Voice function settings

5.5 Measurements

5.5.1 G821/G826/M2100

5.5.2 Propagation delay

5.6 View data

5.6.1 FAS/NFAS/Sa/Si

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5.6.2 CAS/MFAS

5.6.3 Frame monitoring

5.7 Insert errors

5.7.1 Error type

5.7.2 Speed

5.7.3 Count

5.7.4 Start/stop errors insertion

5.7.5 Alarm type

5.7.6 Time

5.7.7 Start/stop alarms generating

5.8 Pulse shape

5.8.1 Operation

5.8.2 Pulse shape monitoring

5.8.3 Oscilloscope

5.9 Jitter

5.9.1 Jitter measurements

5.9.2 Maximum Tolerable Jitter

5.9.3 Jitter Transfer Function

5.9.4 Jitter generation

5.10 Configuration

5.10.1 Basic settings

5.10.2 Line interface

5.10.3 Calibration mode

6 Warranty and software

7 About VeEX

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About the analyzer

TX50e is an advanced compact handheld analyzer/generator for E1 communications. It can be use for

installation, serve, and maintenance of 2Mbps transmission paths which contain voice, data service at 2.048

Mbps rate.

The test set is connected to the primary data transfer interface (ITU-T Recommendation G.703). It can be operate

as a generator/supervisor for different types of test signal in AMI and HDB-3 coding or as a monitor/signal

analyzer for PCM systems (ITU-T Recommendation 0.162)

Technical specifications

Output Line interface

Input Line interface

Transmitter

Transmitter Clock

Interface G.703

Connector RJ-45, banana or BNC

Rate 2.048 Mbit/s

Impedance 120 Ωbalance or 75 Ωunbalance

Pulse masks G.703

Line code AMI, HDB-3

Maximum peak to peak

jitter 0.015 UIpp (Conforms to G.823)

Interface G.703

Connector RJ-45, banana or BNC

Rate 2.048 Mbit/s

Impedance 120 Ωbalance or 75 Ωunbalance

Pulse masks G.703

Line code AMI, HDB-3

Maximum input jitter Conforms to G.823

Clock source From received signal

Internal: 2.048 Mbps ± 3ppm

External: 2.408 MHz or 2,048 Mbps

Internal clock stability 5 ppm

Frequency offset ± 6 KHz in 1 Hz resolution

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Frame structure

Test Pattern

Alarm and Errors

2048 kbit/s G704 PCM 30, PCM31 with/without CRC-4

Pattern types Fixed: All 1, All 0, 1010

PRBS: 2n-1 where n = 6, 9, 11, 15, 23

Pattern Standard O.153

O.152, O.153

O.151

Fixed word length 24 bit

Polarity Normal, inverted

Generation modes Single, continuous, user defined

Errors/Slips insertion Continuous or single

Errors rate 1 x 10-n, where n= 2 to 7

Alarm type LOS - Loss of Signal

AIS - Alarm indication signal

LOF - Loss of Frame alignment

RDI - Remote Alarm Indicator

LOM - Loss of CAS Multiframe Alignment

RMA - Multiframe Remote Alarm Indicator

LSS - Loss of Test Sequence Synchronization

ARTF: Unstructured alternating 1s and 0s.

Error type CODE - Code error

FAS - Frame alignment error

CRC - CRC-4 block error

REBE - CRC block error in remote end

BIT - Bit error in PRBS and fixed word

+SLP - Positive bit slip

-SLP - Negative bit slip

E-bit - Transmitted E-bit errors

MFAS - Multiframe Alignment Synchronization

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Receiver

Receiver Clock

Frame structure

Test Pattern

Detected events

Clock source Recovered form received data stream

2048 kbit/s G704 PCM 30, PCM31 with/without CRC-4

Pattern types Fixed: All 1, All 0, 1010

PRBS: 2n-1 where n = 6, 9, 11, 15, 23

Pattern Standard O.153

O.152, O.153

O.151

Fixed word length 24 bit

Polarity Normal, inverted

Alarm LOS - Loss of Signal

AIS - Alarm indication signal

LFA - Loss of Frame alignment

RDI - Remote Alarm Indicator

LOM - Loss of CAS Multiframe Alignment (SW-CAS)

RMA - Multiframe Remote Alarm Indicator (SW-CAS)

LSS - Loss of Test Sequence Synchronization

Errors and Slips CODE- Code error

FASE - Frame alignment error

CRC - CRC-4 block error

REBE - CRC block error in remote end

BIT - Bit error in PRBS and fixed word

+SLP - Positive bit slip (SW-ES)

-SLP - Negative bit slip (SW-ES)

MFSE – Multiframe Synchronization Error

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Jitter Measurements

Results

LED indication

LEDs on TX50e’s front panel display following receiver conditions:

Software Features

Oscilloscope Line signal

Interface 2.048 Mbit/s

Jitter measuring circuit

and filters Conforms to ITU 0.171

Frequency reference internal

Range 0.05 to 10 UIpp

Error Jitter measuring 0.025% ± 5% UIpp

Events Alarm counters

Errors counters

Bit Error Rate

Bit monitoring Timeslot 0 (FAS, NFAS)

Timeslot 16 (MFAS)

abcd signaling bits of all 30 channels

All timeslots (frame)

SIG Signal Presence

AIS Alarm Indication Signal (G.703)

FRM Frame Alignment Detected

MFR Multiframe Alignment Detected

RDI Remote Alarm Indicator

SES Severely Errored Seconds

If the BER value is more than 10ˉ³ in BER test mode or if

more than 30% CRC blocks are Errored in case of CRC

synchronization.

RMA Multiframe Remote Alarm Indicator

PAT Pattern Synchronization and Loss

GUI language English

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Hardware platform

General Description

Main Parts

Front panel

Front panel is made up of color LCD display, keyboard, and a row of three-color LEDs indications (see

Figure 3.1).

Software update USB

External power Input 100-240V AC, 50/60 Hz

Output 9V @ 0.8 A

Battery power rated voltage 4.8V

from interface USB

Dissipation 8 Watt

Autonomy mode 6 hours

Interface USB

Dimensions

(H x W x D) 85x155x40mm (6.1 x 3.34 x 1.57 in)

Weight 0.4 kg (0.88 lbs)

Display Backlight color LED

240x320 pixels

Input keyboard

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1. LEDs

Three-color LED indicators provide visual control for power supply, measurements and data receiving

conditions. The color of any LED would denote the following:

Green: Correct operation since LED reset.

Red: Alarm present.

Yellow: Since LED reset, at least one error has been registered.

2. Display

320 x 240 pixels, backlight color LCD.

3. Keyboard

15 button keyboard.

4. Power button (On/Off)

To switch the instrument on/off press the power button and hold it for 1-2 seconds.

5. Status bar shows following parameters (left to right):

{Internal battery voltage (in Volts) or an “USB/9V” sign in case of external power supply or USB-

interface is connected.

Figure 3.1: Front panel

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{“M”, “P” or “–“ symbols show state of measuring mode: “M” – measurements, “P” – pause, “–“ – no

measurements at the moment.

{“S” or “–“ symbols show state of the test pattern transmission mode: ”S” – transmission, “–“ – no test

pattern transmission.

{“A”, “Е” or “–“ symbols show the errors insertion mode state: “Е”– errors insertion, ”А” – alarms

generation, “–“ – normal operation.

{“V” or “–“ symbols show the voice function mode: “V” – VF insertion from the microphone, “– “ –

normal operation.

{Signal level at the Rx port (in dB).

{Current time.

LED indicators description

Power External power supply:

•No indication – no external power supply connected.

•Green – external power supply is connected.

•Green/Yellow (blinking) – internal battery is charging.

SIG Signal Presence:

•Green – signal detected.

•Red – loss of signal at the moment.

•Yellow – since reset, loss of signal has been registered at least once.

IS Alarm Indication Signal (all 1):

•Green – no AIS alarm has been registered since reset.

•Red – AIS alarm at the moment.

•Yellow – since reset, AIS alarm has been registered at least once.

FRM Frame Alignment Detected:

•Green – frame is synchronized.

•Red – loss of frame synchronization at the moment.

•Yellow – since reset, loss of frame synchronization has been registered.

MFR Multiframe Alignment Detected:

•Green – multiframe is synchronized.

•Red – loss of multiframe synchronization at the moment.

•Yellow – since reset, loss of multiframe synchronization has been registered.

RDI Remote Defect Indication:

•Green – no RDI detected.

•Red – RDI detected at the moment (bit A=1 in NFAS).

•Yellow – normal operation, but since reset, RDI has been registered.

SES

Severely Errored Seconds. If the BER value is more than 10ˉ³ in BER test mode or if more than 30%

CRC blocks are Errored in case of CRC synchronization:

•Green– normal operation since reset.

•Red– SES at the moment.

•Yellow– since reset, at least one severely errored second has been registered.

RMA Multiframe Remote Alarm Indicator:

•Green– no RMA detected.

•Red– RMA alarm at the moment.

•Yellow– normal operation, but since reset, RMA has been registered.

PAT Pattern Synchronization and Loss:

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