TW-2B PCM Channel Analyzer
 
1、Features
·Portable design;
·Built-in test template, and graphic display;
·Built-in DC loop feeding circuit and DC loop holding circuit;
·Human engineering design, intelligent English operation interface;
·Large-screen LCD, 320×240 lattice, EL backlight; 
·With mini printer and external printer interface
2、Functions
·English menu, Large-screen, simple operation;
·Multi-task operation (test and browse former records simultaneously);
·Test signal level, frequency gain, level gain, quantizing distortion, idle channel noise, crosstalk, Return loss and longitudinal balance loss;
·End to end and loop-back test;
·Single-channel or 30-channel automatic test, and print it as report form.
·Full-automatic mode, manual mode, full-automatic mode can select one item, several items or all of measure parameters, and the step can be programmable;
·It can save over 60 groups of measure results; the test setup memory can be up to 9; it can also operate non-volatile memory;
·Built-in generator and receiver, the output interface and input interface are respectively with direct current loop feeding circuit and direct current loop holding circuit, not only it can measure E&M 2/4-wire interface, but also it can measure LGE、FXO，LGS、FXS interfaces;
·Test result graphic display, compare with built-in ITU-T rec.;
·Measurement result can upload to PC, and take it for analyzing, filing and printing;
·Online updating for embedded software.
 
3、Technical parameters
3.1Generator        
Signal frequency
100Hz～4000Hz，step: 10Hz
Output level
+6～-61dBm0，step: 1dB
Relative level
+1～-17dB，step: 0.1dB
Distortion degree
1020Hz/0dBm0，≧50dB
Frequency response
±0.1dB
Output impedance and return loss
600Ω within 200～3600HZ, return loss≥36dB
Output balance degree
≥60dB within 200～3600Hz
3.2 Receiver
Level
Frequency
200Hz～3600Hz
Level range
+13dB～-78dB，in which dBm0:+6～-61dB,
dBr: +7～-17dB
Measurement error
0dBm0 is ±0.2dB，others are ±0.3dB
Ref. signal
1020Hz/-10dBm0
Frequency gain
Ref. signal
1020Hz/-10dBm0
Frequency range
200Hz～3600Hz
Measurement range
-60dB～+60dB
Measurement error
±0.2dB
Level gain
Ref. signal
1020Hz/-10dBm0
Level range
+5dBm0～-60dBm0
Measurement range
-60dB～+60dB
Measurement error
±0.2dB
Idle channel noise
Assistant signal
closed
Measurement range
-90dBm0 p～+5dBm0 p, ITU-T weighted
Measurement error
-90 ~ -75dBm0p：±2.5dB
-75 ~ -70dBm0p：±1.5dB
-70 ~  +5dBm0p：±1dB
Crosstalk
Disturbing signal
1020Hz/0dBm0
Measurement range
-90dBm0～+5dBm0
Error range
±1 dB
Quantizing distortion
Ref. frequency
820Hz
Level range
+5dBm0～-60dBm0
Measurement range
0～60dB，ITU-T weighted
Measurement error
±0.8dB
Return loss
Signal frequency range
200Hz~3600Hz，level: 0dBm0
Measurement range
0dB~62dB
Measurement error
±1dB
Longitudinal balance loss
Signal frequency range
200Hz~3600Hz，level: 0dBm0
Measurement range
0dB~82dB
Measurement error
±1dB
Input impedance and return loss
input impedance is 600Ω within 200～3600HZ, and return loss ≥36dB
Input balance degree
≥60 dB within 200～3600Hz
Interface balance
600Ω，200Ω+560Ω//0.1UF ;  200Ω+680Ω//0.1UF；
Relative level
-17～+7dB，step: 0.1dB
Direct current loop
IGT dynamic impedance >100KΩ, maximum loop current is 60mA, and loop voltage drop is -15V;
OGT dynamic impedance >100KΩ, and constant current of feeding circuit is 22mA
Power supply
 
(1)With special power adapter
INPUT:AC220V 50Hz
OUTPUT:DC 9V 1A
(2) Internal rechargeable battery
   4000mAh 6V Ni-MH rechargeable battery
   Working time: 6 hours
Charge: 6 hours at turn-off; 10 hours at turn-on;
Printer
μP40-TS(CH) Standard serial Chinese/English mini-printer（Optional）
Dimensions
L×W×H=200×160×42mm
Weight
1kg
Operation temperature
0～40℃
Storage temperature
-20～+70℃
Humidity
5%～90% non-condensing
 
 
 
4. Packing List
 
No.
Item
 QTY
1
TW-2B PCM Channel Analyzer
1 PC
Documents
2
User’s manual
1 PC
3
Software disc
1 PC
4
Certificate/Warranty
1 PC
5
Packing list
1 PC
Attached accessories
6
Connecting line with three pole
2 PCS
7
RS232 serial communication line
1 PC
8
Adapter
1 PC
9
Handy-case
1 PC
10
Mini printer (optional)
1 PC
11
External printer interface (optional)
1 PC
Category
Contact
Contact