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DIGITAL LINK MEASURING INSTRUMENTS

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PPP packet transmission and real time count

Transmits the three types of packets (can be set separately) by op-

tional sequence (the idle length between each packet can be set si-

multaneously.). Displays the number of Tx packets and Rx ppp pack-

ets at real time.

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PPP packet capture and display

Samples PPP packet from the capture memory, and displays IP

header. Detects FCS error and displays it in red.

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Various wander generation functions (option)

Various wander generations for evaluation are available: such as

TDEV wander tolerance measurement and TDEV wander transfer

characteristics measurement that were regulated by ITU-T, ANSI,

Bellcore, and ETSI.

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Tandem connection

The N1/Z5 and N2/Z6 bytes can be set and measured.

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Various analysis functions

The internal optical power meter and frequency counter allows the

user to measure optical power and frequency during error and alarm

measurement without changing the connections of the signal cables.

The MP1570A can capture any SOH/TOH or POH (1 byte), K1/ K2

byte, or H1/H2 byte in 1023 frames to analyze errors and alarms, and

check APS operation.

Measured errors and alarms can be displayed as a graph with a time

scale in 1 second, 1 minute, 15 minutes, or 60 minutes.

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Pointer value monitoring

Changes in pointer value can be displayed as a graph with values

updated in real time.

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MUX/DEMUX function (option)

When the MUX/DEMUX option is added, the multiplexing structure

including the frame alignment signal can be generated, and multi-

plexer/demultiplexer measurement can be performed.

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Non frame pattern/CID pattern

Frames can be set on/off at all bit rates. CID pattern can generate or

analysis at SONET/SDH measurements.

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Through modes

One of the three through modes can be selected: (1) Transparent, (2)

Overhead/Overwrite, and (3) Payload/Overwrite. The external

DS1/DS3/PDH signal can be added/dropped to/from payload at pay-

load overwrite.

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Enhanced error/alarm simulation

The MP1570A can generate normal and abnormal frames alternate-

ly to test the frame synchronization function of terminal equipment.

(This is an SDH/SONET FAS error addition function.)

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Easily operated pointer sequence test (combined jitter mea-

surement)

Able to generate the justification pattern conforming to ITU-T G.783

from the transmission equipment side, and simultaneously make the

tributary signal offset variable. This makes the combined jitter test

possible.

Jitter, wander measurements (1.5 Mbit/s to 2.5 Gbit/s)

The jitter/wander measurement conforming to ITU-T O.171/O.172

exceeds these standards in performance evaluation. Automatic mea-

surements, such as jitter tolerance, jitter transfer, and jitter vs. fre-

quency offset are performed in a short time. Various automatic mea-

surements can be achieved with just one unit.

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Wander measurement (option)

Subdivides the bandwidth of the wander measurement into three

ranges, and can analyze the wander factor caused by temperature

change, pointer, etc. It can also perform measurements conforming

to ITU-T O.172.

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Through jitter function (only SONET/SDH)

Able to generate the jitter by through, while monitoring the input jitter

quality.

ATM

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Supports ATM from 1.5M to 622M rates

TC layer mappings of 622M, 156M, 52M, 139M, 45M, 34M, 2M and

1.5M are supported along with ATM mappings of O.191, AAL1,

AAL2, AAL3/4, and AAL5, which makes the MP1570A ideal for vari-

ous combinations of layers. The VPI/VCI for 1023 channels can be

detected automatically, and the presence/absence of alarms, cell

count, and non-conforming cell count can be displayed graphically,

for easy comparison of line channel traffic.

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1- and 2-point CDV in conformance with I.356

When measuring delay in cell traffic, either 1-point CDV or 2-point

CDV conforming to ITU-T Rec. I.356 can be selected according to

the conditions.

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Simultaneous display of error cells, inserted error cells and

lost cells

The error/alarm generation conditions can be displayed both numerical-

ly and graphically to give a visual impression of the traffic conditions.

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Traffic monitoring

The constantly changing traffic can be displayed as a graph for the

selected-one-channel VPI/VCI.

IP-over-SONET/SDH, IP-over-ATM (option)

Programs IP/PPP at will transmits it, picks PPP packet from capture

memory (option), displays it and supports high-speed POS router

evaluation. And programs IP in the AAL5 payload at will transmits it,

picks the IP packet from the cell capture memory, and displays it.

And supports ATM router evaluation.

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IP/PPP header setting

Able to set the value of each header optionally when selecting IPv4

or IPv6. Calculates FCS or header checksum automatically.

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