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AV5283 SDH PDH Digital Transmission Analyzer
it is mainly used for comprehensive transmission test of SDH/PDH network and equipment and widely applied in the R&D, manufacture, acceptance inspection, performance monitoring, maintenance and measuring of networks and equipment. The instrument can insert and measure varieties of errors and alarms

 Specifications

AV5283 SDH/PDH Digital Transmission Analyzer

it is mainly used for comprehensive transmission test of SDH/PDH network and equipment and widely applied in the R&D, manufacture, acceptance inspection, performance monitoring, maintenance and measuring of networks and equipment. The instrument can insert and measure varieties of errors and alarms in PDH and SDH systems (including on-line and off-line test), perform performance analysis on various errors as well as modulate and test jitter signals at a max. test rate of 2488MHz (STM16). It also has many function-test capabilites, such as: automatic protection convert test, generation and analysis of pointer adjustment and frequency test.

Main Technical Specifications:
1 PDH Test
1.1 PDH clock frequency and frequency offset
    Clock Frequency: 2.048MHz, 8.448MHz, 34.368MHz, 139.264MHz
    Accuracy:7ppm.
    Frequency Offset:-100ppm+100ppm,step 1ppm.
1.2 Pattern
    PRBS:2 9 -1, 2 11 -1, 2 15 -1, 2 20 -1, 2 23 -1
    Word:16 bit programmable, all"0", all "1", 1010, 1000
1.3 Error Add and Performance Analysis
    Adding of BIT, FRAME, CODE, CRC-4 and CRC-4 REI
    Error Insert:10 -3, 10 -4, 10 -5, 10 -6, 10 -7, single
    Performance Analysis:agreeing with ITU-T G.821(1996), ITU-T G.826 (1996), ITU-T M.2100 (1995), ITU-T M.2110 (1997) and ITU-T M.2120 (1997)
1.4 PDH Alarm Generation and Test
    Alarm Generation: LOS, all "1", LOF, LMF, Frame Report , Multi-frame Report
    Alarm Detection: besides all the generated alarms, pattern synchronous loss and error are also added.
1.5 I/O interface
    Agrees with ITU-T G.703(1998)
    Output Line Code: 2Mb/s:AMI, HDB3 (75 unbalanced, 120 balanced)
    8Mb/s:HDB3(75unbalanced)
    34Mb/s:HDB3(75unbalanced)
    139Mb/s:CMI(75unbalanced)
    Input Interface: balanced at 1/2 signal rate(as shown in Table 1)
1.6 PDH Frequency Test
    Resolution:1Hz
    Accuracy:15ppm
Table 1 Input signal balanced
Signal Rate( f) Balanced at f/2
2.048Mb/s 6dBm
8.448Mb/s 6dBm
34.368Mb/s 12dBm
139.264Mb/s 12dBm

2 SDH Test
2.1 SDH Clock Frequency and Frequency Offset
    Clock Frequency: 155.520MHz, 622.080MHz, 2488.320MHz
    Accuracy:4.5ppm.
    Frequency Offset: 999.9ppm, step: 0.1ppm
2.2 SDH Error Add and Error Performance Analysis
    Error Add:(as shown in Table 2)
Table 2 Error add
Error Type Single Ratio 10 -N
Frame  
B 1 59
B 2 39
B 3 49
MS-REI 49
HP-REI 49
HP-IEC 49
TU-BIP(block) All Errors  
LP-REI All Errors  
    Error Performance Analysis:Conforms to requirements in ITU-T G.826(1996)
2.3 SDH Alarm Generation and Detection
    Alarm Generation: LOS, LOF, OOF, MS-AIS, MS all "1", AU-LOP, AU all "1", HP-RDI, HP-unloaded, TU all "1", LP-RDI, LP-unloaded, H4 LOM
    Alarm Detection: besides all the above alarms, there are K1 K2 Change, TUG3 TU-LOP, Synchronous Loss of Pattern. Clock Loss, Pointer Adjustment
2.4 Mapping and Demapping
    The mapping and demapping conforms to ITU-T G.707(2000) Mapping Structure and relative rules in YD/T 966-1998. The structure is as shown in figure 1.

Figure 1 SDH Mapping Structure

2.5 Overhead Set and Monitor, Overhead Set and Capture
    Overhead Set and Monitor:
    SOH: set all SOH but B 1, B 2, H 1, H 2, H 3, monitor all SOH
    POH: set all POH but B3, monitor all POH
    Overhead Set and Capture:
    Regeneration Section: A1A2, J0, E1, F1, D1-D3
    Multiplexing Section:K1K2, D4-D12, S1, Z1, Z2, E2
    You can set 5 sequences and every sequence can send max. 64,000 frames.
2.6 Overhead Error Test
    RSOH: D1-D3 (single bit), J0, E1, F1
    MSOH: D4-D12 (single bit), K1, K2, S1, E2
    HPOH: J1, C2, G1, F2, F3, K3, N1
2.7 Pointer Set and Test
    Pointer Set: Burst Pointer, Offset, New Pointer, Pointer Sequence (G.783)
    Pointer Test: Pointer Value, Times of Positive/Negative Adjust, Adjust Second, NDF Second, NDF Loss Second, VC Offset
2.8 I/O Interface
    STM-1 Electrical Output:CMI(BNC,75 unbalanced)
    STM-1 Electrical Input:CMI(BNC,75 unbalanced), f Gain
    STM-1/4 Optical Output:1550nm, -1dBm2.0dBm, PC/FC connector
    1310nm, -10dBm2.5dBm, PC/FC connector
    STM-1/4 Optical Input:1550nm/1310nm, max. -8dBm
    Sensitivity -28dBmPC/FC connector
    STM-16 Optical Output: 1550nm, -2dBm +3.0dBm, PC/FC connector
    1310nm, -2dBm +3.0dBm, PC/FC connector
    STM-16 Optical Output:1550nm/1310nm, max. -8dBm
    Sensitivity -18dBm, PC/FC connector
2.9 SDH Frequency Measurement
    Below 622.080MHz: Frequency Resolution:1Hz,Accuracy:15ppm
    2488.320MHz:Frequency Resolution:100Hz,Accuracy:60ppm
2.10 Jitter Measurement
    Conforms to rules about relationship between jitter output amplitude and modulate frequency in ITU-T O.171(1992), ITU-T O.172(1999)
    Jitter Range of Transmission:
    PDH: 1UI, pace span 0.01UI; 10UI, pace span 0.1UI
    STM1: 1UI,pace span 0.01UI; 10UI, pace span 0.1UI; 50UI, pace span 0.1UI
    STM4: 1UI,pace span 0.01UI; 10UI, pace span 0.1UI; 200UI,pace span 0.1UI
    STM16:20UI,pace span 0.01UI; 400UI,pace span 0.1UI
Table 3 Jitter Transmission of W
Signal Type Transmission Range W(UI)
PDH signal 1UI 0.07
10UI 0.26
SDH signal 1UI 0.15
10UI 0.34
20UI 0.68
50UI 1.4
200UI 6.0
400UI 12.5

Table 4 Jitter Transmission of Q
Signal Rate Modulation Frequency Q
2.048MHz 20Hz-100kHz 8
8.448MHz 20Hz-400kHz 8
34.368MHz 100Hz-500kHz 8
  500kHz-800kHz 12
139.264MHz 200Hz-500kHz 8
  500kHz-2MHz 12
  2MHz-3.5MHz 15
155.520MHz 500Hz-500kHz 8
  500kHz-1.3MHz 12
622.080MHz 1kHz-500kHz 8
  500kHz-2MHz 12
  2MHz-5MHz 15
2488.320MHz 5kHz-500kHz 8
  500kHz-2MHz 12
  2MHz-20MHz 15

Jitter Measurement Range:
    1.6UI display resolution:0.001UI
    16UI display resolution:0.01UI
    32UI display resolution:0.01UI
    Jitter Measurement Accuracy (peak-to-peak): R%W (HP1-LP within the bandwith of filter wave)
    The W and R values are as shown in Table 5 and 6
Table 5 Transmission measurement of W
Signal Rate Measurement Range W(UI)
2.048MHz 1.6UI 0.08
16UI 0.28
8.448MHz 1.6UI 0.08
16UI 0.28
34.368MHz 1.6UI 0.08
16UI 0.28
139.264MHz 1.6UI 0.08
16UI 0.36
STM-1 1.6UI 0.08
16UI 0.36
STM-4 1.6UI 0.12
16UI 0.50
STM-16 1.6UI 0.24
32UI 4.8

Table 6 Transmission measurement of R
Signal Rate Jitter Modulation Frequency R
2.048MHz 20Hz100kHz 7
8.448MHz 20Hz300kHz 7
300kHz400kHz 8
34.368MHz 100Hz300kHz 7
300kHz800kHz 8
139.264MHz 200Hz300kHz 7
300kHz1MHz 8
1MHz3MHz 10
3MHz3.5MHz 15
STM-1 500Hz300kHz 7
300kHz1MHz 8
1MHz1.3MHz 10
STM-4 1kHz300kHz 7
300kHz1MHz 8
1MHz3MHz 10
3MHz5MHz 15
STM-16 5kHz300kHz 7
300kHz1MHz 8
1MHz3MHz 10
3MHz10MHz 15
10MHz20MHz 20

3 Remote Control
    The instrument accomplishes remote control through RS-232.
4 Self-test
    The instrument can implent self-test functions.
5 Print
    The instrument can print measurement results.
System Configuration
    The instrument takes a modular design, so the users can choose different test modules according to their own needs.There are 9 modules available now, as shown in the following:
(1) STM-16 Optical Interface Module:for transmission and reception of STM-16 light signals
(2) STM-4/1 Optical Interface Module:for transmission and reception of STM-4/1light signals
(3) SDH Electrical Inter face Module:STM-1electrical test, overhead and function test
(4) PDH Transmission Module:transmits PDH framed and unframed signals
(5) PDH Reception Module:receive and measure PDH framed and unframed signals
(6) Jitter Transmission Module:generates PDH, SDH data jitters
(7) Jitter Test Module:Jitter amplitude measurement
(8) Control Module:used to control the whole instrument
(9) Power Module:provides power for the whole instrument

 
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