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
Pa
g
e 1 of 30TX50e e-Manual D07-00-009 REVA00

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
Pa
g
e 2 of 30TX50e e-Manual D07-00-009 REVA00

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
Pa
g
e 3 of 30TX50e e-Manual D07-00-009 REVA00

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
Pa
g
e 4 of 30TX50e e-Manual D07-00-009 REVA00

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
O.151
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
Pa
g
e 5 of 30TX50e e-Manual D07-00-009 REVA00

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
O.151
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
Pa
g
e 6 of 30TX50e e-Manual D07-00-009 REVA00

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
Pa
g
e 7 of 30TX50e e-Manual D07-00-009 REVA00

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
Pa
g
e 8 of 30TX50e e-Manual D07-00-009 REVA00

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
Pa
g
e 9 of 30TX50e e-Manual D07-00-009 REVA00

{“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.
A
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:
Pa
g
e 10 of 30TX50e e-Manual D07-00-009 REVA00