PCM-40 [JDSU]
PCS-40 PCM Channel Selector; PCS- 40 PCM通道选择
| 型号： | PCM-40 |
| 厂家： | 
JDSU |
| 描述： | PCS-40 PCM Channel Selector |
| 文件： | 总6页 (文件大小：636K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
COMMUNICATIONS TEST & MEASUREMENT SOLUTIONS
PCM-40 PCM Channel Analyzer
PCS-40 PCM Channel Selector
• Ideal for installation, line-up, commissioning, fault localization, and repairs
• Handy, modern concept for field applications based on a lightweight analyzer module
and IBM-compatible PC or notebook
• Menu operation with color (or monochrome) VGA display
• Graphical presentation of all results with flexible zooming and scaling
• User definable:
– variable test parameters
– automatic test sequences
– graphical tolerance masks
• Large memory for instrument settings and test results on PC and hard disk
• Numerical and graphical result printout on PC printers with selectable conditions
• Complete digital and analog tests to ITU-T Recs. G.712 and O.133/O.162
• Complex impedances
• PCM-30 and PCM-31 frame structures including CRC error detection mode
• Comprehensive codec, frame and CAS measurement capabilities incl. G.821 BERT
• High accuracy and reproducibility of test results
• Selective measurement capability with 30 Hz filter
• Monitoring of signaling status for all 30 VF channels (CAS)
• Loop, MUX/DEMUX, and drop & insert modes for analog and 64 kb/s interface
• Optional 64 kb/s interface with co and contradirectional clock to ITU-T Rec. G.703 for
D&I and BERT modes
• Control of PCS-40 channel selector
ForcodecandlinecardtestsonPCMmultiplexersanddigitalexchanges
Determininglong-termstability(aging)
Communicationssystemsandnetworkelementsaresubjectedtoawidevarietyofenvironmental
influenceswhichadverselyaffectcomponentperformancetoagreaterorlesserdegree.Iftheeffect
of such influences on, say, system gain are to be recorded, the PCM-40 provides support for this
application. Duringsystemline-up, theresultsandinstrumentconfigurationarestoredsothatthey
caneasilyberecalled.Inthesubsequentmeasurement,theresultsaredisplayedwithinthetolerance
mask and the new result trace is superimposed. The instrument then determines the difference
betweenthetwomeasurementssothatthedeviationcanbeseendirectly.
Statusofconnectedtestsignal
The PCM-40 continuously monitors the connected test signal during the measurement and dis-
plays the result on the front panel and in detail on the screen. This keeps you informed of the status
andpreventsincorrectinterpretationofthemeasurementresults.
Storageofmeasurementconfigurations
The test equipment settings required for routine or specialized manually-performed measure-
ments, along with explanatory comments, can simply be stored by the PCM-40. The number of
setupswhichcanbestoredislimitedonlybythesystemresourcesofthecomputeryouareusing.
WEBSITE: www.jdsu.com
PCM-40 PCM Channel Analyzer
2
Automatictestsequences
Qualitymonitoringinanidlechannel
You can produce automatic test sequences by
combiningseveraltestconfigurationstogether
fromtherangeofsetupswhichyouhavestored.
All of the measurement functions included in
the PCM-40 along with any variations in test
variables, parameters and tolerance limits,
can be used for this in any order required. The
sequence can be programmed to stop if an
incorrect result is obtained or before each dif-
ferentmeasurementtask.
Facilities for monitoring the quality of PCM
systems which do not use CRC frames are lim-
itedtomonitoringtheframealignmentsignals.
The PCM-40 can, however, perform a loop-
back or end-to-end measurement to ITU-T
G.821 in an idle channel. The instrument
transmits a test pattern which it then evalu-
ates.Theresultscanbeshownasatableorasan
errorhistogram.
PCM-40 as an automated measuring
system
e fall-off in gain can be clearly seen. e blue trace
was recorded on commissioning the system, the red
trace at a later date. e “DIFF RESLT” function de-
termines the difference between the two traces. e
zoom function and cursors allow every detail to be
examined.
Monitoringdigitalpathsinthroughmode
orviahigh-impedancetaps
When testing PCM multiplexers, the PCS-40
channel selector connects up to 30 analog TX
and RX channels sequentially to the PCM-40
analogtestports.ThePCS-40channelselector
allowsreturnlossandlongitudinalconversion
loss measurements on individual VF channels
using the built-in bridges. Also test needing
D.C. loop holding circuit or feeding bridge are
possible. The result is a flexible and powerful
test system well suited to production, installa-
tionandmaintenanceof2Mb/smultiplexers.
Forlong-termmonitoringof2Mb/spaths,the
circuit can be looped-through the PCM-40
transparently or tapped via a high impedance
monitor point. If the power supply fails during
loop-throughmeasurements,thesignalpathis
not interrupted. The following measurements
canbeperformed:
• Frame monitoring with FAS errors recorded
as histograms
• Level, frequency and coder level monitoring
including audio monitoring in a selected
channel
A test configuration (setup) includes all test and inter-
face parameters required to perform a measurement.
e setup name is used to relate the setup to a particu-
lar device under test.
• Recording of byte changes in the selected
frame or data channel
• Signaling status display for individual chan-
nels
Errors in the idle channel shown with their times of
occurrence. Sporadic faults can thus be easily seen and
matched in time to possible sources of interference.
Ch x
Ch x
Tx
PCS-40
Channel
Selector
Tx
PCM
MUX
Ch 1 to 30
Rx
PCM-40
Rx
Ch 1 to 30
Automatic sequential connection of up to 30 analog
Tx and Rx ports of a PCM MUX equipment to the
PCM-40 channel analyzer.
30 channel automatic sequential weighted noise mea-
surement
PCM-40 PCM Channel Analyzer
3
Testmodesandconfigurations
Test modes
Variable parameters
Channel
Test configuration
A-A
A-D
D-A
D-D
T-D
D-T
T-T
Gain or loss
Frequency tone, MTTS/level/tone,
noise/time
•
•
•
•
Frequency & channel
level & channel
1)
Transhybrid loss
Level
Frequency
•
Channel
Frequency, time
•
•
•
•
Received level
Peak code
Channel
Level
•
Channel
Level
•
Coder offset
Total distortion
Channel
Level
•
Channel level & channel
Level/tone, noise
•
•
•
•
Weighted noise
Far end crosstalk
Near end crosstalk
Channel
Time
•
•
•
•
•
•
•
Channel
Level
Channel
Level
•
Group delay/distortion
Frequency/MTTS
•
•
•
•
Dual tone intermodulation
Channel
Level
•
•
•
•
Return loss
Channel
Frequency
Frequency & channel
Longitudinal balance
Channel
Frequency
Frequency & channel
Frame monitor/O.162, G.821
Word test
Time (FAS, channel)
•
•
•
•
•
•
Time
Time
Time
•
•
•
•
•
•
•
•
•
Event counter
BERT/G.821
Channel associated signaling status Time
Signaling distortion
Drop & insert
•
•
•
•
A = 600 W, 900 W or complex, 4-wire or 2-wire analog interface
D = 2048 kb/s digital interface to ITU-T Rec.s. G.703, G.704
T = 64 kb/s digital interface to ITU-T Rec. G.703 (optional)
•
indicates available test configurations
available only with PCS-40
1) with external 2-wire termination
PCM-40 PCM Channel Analyzer
4
Specifications
Notch filter
at aux. signal frequency,
bandwidth 30 Hz
Repetitions
Freely selectable FAS sequence
1 to 9999 or continuous
Analogsignalgenerator
n × 7 bits,
n = 1 to 60
Sinewavesignal
Frequency range
Resolution
Frequency accuracy
Harmonic distortion
Level range
Level increments
Dual tone signal
Frequency range
Resolution
Levelmeasuringrange(minimum)
Signal level
Resolution
Noise, crosstalk
Resolution
Relative level range
Level increments
Group delay distortion
Resolution
200 to 3600 Hz
4 Hz
Freely selectable
MFAS sequence
-60 to +8 dBm0
n × 4 bits,
n = 1 to 60
± 50 × 10-6
0.01 dB
-80 to 0 dBm0
0.01 dB
>56 dB at 0 dBm0
-60 to +5 dBm0
0.1 dB
Error insertion
FAS, MFAS, MFW, channel,
signaling channel
-15 to +5 dBr
0.1 dB
Error ratio
Digital milliwatt signal
5 × 10-3 to 5 × 10-7
to ITU-T Rec. G.711
0 to 10 ms
0.1 ms
200 to 3600 Hz
4 Hz
-60 to -1 dBm0
Output
Bit rate
Interface parameters
Line code
Unbalanced impedance
Connector
2048 kb/s
to ITU-T Rec. G.703
HDB3 or AMI
75 W
coaxial, BNC
120 W
balanced, 3pole CF
Level range
Input
Impedance
Level
same for both spectral lines
600 W, 900 W,
>30 kW and complex1)
>36 dB (200 to 4000 Hz)
>50 dB (200 to 3600 Hz)
Pseudo-randomnoisesignaltoITU-T
Rec. O.131
Sequence repetition rate (period)
Bandwidth
Peak factor
Return loss
Balance
Balanced impedance
Connector
256 ms
350 to 550 Hz
10.5 dB
-60 to 0 dBm0
0.1 dB
Max. DC voltage 60 V (between a/b and ground)
Connector balanced, 3pole CF
Operatingmode
Loop-through (2 Mb/s)
Test pattern insertion into one time slot
Analysis of one time slot
Level range
Level increments
1) Complex impedance: 220 W in series with 820 W in parallel
with 115 nF; other values on request
MTTS(multitonetestsignal)
Frequency range
Level range
Digitalsignalgenerator
PCM frame structure
32 channel PCM frame containing
30 telephone channels, or
31 telephone channels
Encoding law
200 to 3860 Hz
-30 to 0 dBm0
Generatoroperation
from internal clock
or external clock
or clock derived from received signal
to ITU-T Rec. G.704
2048 kHz ± 50 × 10-6
2048 kHz ± 100 × 10-
Levels
same for all 37 spectral lines
Output
time slots 1 to 31
ITU-T Rec. G.711, A or µ law
Impedance
Return loss
Balance
600 W, 900 W, and complex1)
>36 dB (200 to 4000 Hz)
>50 dB (200 to 3600 Hz)
Digitalloops
2 Mb/s loop
Sinewavesignal
Frequency range
Resolution
Frequency accuracy
Harmonic distortion
Level range
all time slots
switched through
one selected time slot
generated internally,
remainder switched through
all time slots
200 to 3600 Hz
4 Hz
Relative levels/
increments
Max. DC voltage
2 Mb/s loop
2 Mb/s loop
-15 to +5 dBr/0.1 dB
60 V (between a/b
and ground)
± 50 × 10-6
as per A or µ law
-60 to +3.1 dBm0
0.1 dB
Connector
balanced, 3pole CF
switched through but
channels shifted by 15
Level increments
Auxiliarysignalgenerator
Dual-tonesignal
Sinewavesignal
Frequency range
Resolution
Frequency range
Resolution
Level range
200 to 3600 Hz
4 Hz
-60 to -5 dBm0
Digitalreceiver
PCM frame structure
200 to 3600 Hz
4 Hz
to ITU-T Rec. G.704
(see digital signal generator)
to ITU-T Rec. G.711, A or µ law
Level range
Level increments
Impedance
Connector
Output Impedance
Return loss
Balance
Max. DC voltage
-60 to -30 dBm0
0.1 dB
600 W
balanced, 3pole CF
600* W
Encoding law
Pseudo-randomnoisesignaltoITU-T
Rec. O.131
Sequence repetition rate (period)
Filters
Flat filter
Psophometric filter
256 ms
200 to 3600 Hz
to ITU-T Rec. O.41
up to 3960 Hz
between 200 and 3600 Hz,
Bandwidth
Peak factor
350 to 55 Hz
10.5 dB
>36 dB (300 to 3600 Hz)
>46 dB (200 to 3600 Hz)
60 V (between a/b
and ground)
Level range
Level increments
-60 to 0 dBm0
0.1 dB
Selective filter
center frequency can be set with
4 Hz increments, bandwidth 30 Hz
MTTS(multitonetestsignal)
Filter for distortion
measurement
Connector
balanced, 3pole CF
Frequency range
200 to 3860 Hz
850 to 3250 Hz
or 1380 to 3240 Hz
at aux. signal frequency,
bandwidth 30 Hz
Levels
Level range
Level increments
same for all 37 spectral lines
-30 to 0 dBm0
Analogreceiver
Notch filter
Filters
Flat filter
Psophometric filter
Selective filter
0.1 dB
Group delay measuring signal
Test patterns
MTTS
PRBS6, PRBS9,
PRBS11, PRBS15
200 to 3600 Hz
to ITU-T Rec. O.41
between 200 and 3600 Hz,
center frequency settable in
Alarm detection
no signal, frame loss,
multiframe loss, AIS, multiframe AIS,
remote alarm, remote multiframe alarm
Insertion in
voice channels 1 to 30
Freely selectable
n × 8 bit word sequence
Insertion in
4 Hz increments, bandwidth 30 Hz
Filter for distortion
measurement
n = 1 to 60
FAS, FAW, MFW,
850 to 3250 Hz
channel, signaling channel
or 1380 to 3240 Hz
PCM-40 PCM Channel Analyzer
5
Specifications
Evaluation
CommunicationinterfacesforPCM-40
Serial I
Longitudinalconversionloss(LCL)
measurement
Built-in bridge for LCL measurements accord-
Bit error count, event count,
recording of transients in
digital words
signaling channel, telephone channel
Telephone channel r.m.s. value
measurement
ITU-T G.821 evaluation
Error results displayed as histograms
(for computer control)
Serial II
(for modem connection)
GPIB/<IEC 625> 8.5/IEEE-488.1-1978
(for computer control)
RS232C/V.24
RS232C/V.24
FAS, FAW, MFW,
ing to ITU-T Rec. O.9 on a selectable VF channel
Measurement range
Frequency range
Accuracy
5 to 56 dB
200 Hz to 4 kHz
-80 to +6 dBm0
bit errors, FAS errors
5 to 46 dB
46 to 56 dB
Terminating impedance
Max. input level
1 dB
2 dB
600 W
-6 dBm
Powersupply
External adapter with AC line cord
Input
Bit rate
AC supply
Power consumption
100 to 240 V, 50 to 60 Hz
25 VA
2048 kb/s
Interface parameters
Line code
Unbalanced input impedance
to ITU-T Rec. G.703
HDB3 or AMI
75 W
DCcurrentloop
Two built-in current loops connected to each
test port
DC current
Voltage drop at 20 mA
(100 mA)
Output impedance
(200 Hz to 4 kHz)
Ambienttemperature
Nominal range of use
Limits range of use
(for 2 hours)
+5 to +45 °C
or >2 kW
<150 mA
0 to +55 °C
-40 to +70 °C
Connector
Balanced input impedance
Connector
Clock
Pulling range
coaxial, BNC
Storage and transport
120 W or >2 kW
balanced, 3pole CF
from received signal
± 100 × 10-6
<5.5 V (<12 V)
approx. 30 kW
Airhumidity
Nominal range of use
20 to 80 %,r.h.
(<20 g/m3 absolute)
DCfeedingbridge
Two built-in current loops connected to each
test port
Supply voltage (It = 0)
Supply current (Rt = 400 W)
Supply current (Rt = 0 W)
Output impedance
(200 Hz to 4 kHz)
LCL (200 Hz to 4 kHz)
Measurementinterval
Instrument set-up memory
60sto72h
depends on
PC resources available
Dimensions
(l × w × h in mm)
Weight
290 × 230 × 70
approx. 3.5 kg
appprox. 30 V
>20 mA
approx. 38 mA
Automaticmeasurementsequences
Individual measurements linked
to a sequence
Specifications for PCS-40 PCM
Channel Selector
Testports(Chx)
Maximum level
max. number depends
on PC resources available
approx. 50 kW
>45 dB
Resultdocumentation
Result output to external printer
Output in table or graph formats
Result output as ASCII file to disk
Linestatusindication(TXandRX)
Line feeding voltage on
Line looped
+20 dBm
Max. DC voltage 60 V (between a/b and ground)
Max. DC current
100 mA
Result in table format can be saved to disk with
printout using DOS “PRINT” command.
Result storage and test configuration storage
depends on PC resources available.
Impedance
600 W
Remotecontrol
Insertion loss between test port and
selected Tx/Rx port
(200 Hz to 4 kHz)
Control of all functions from PCM-40 Channel
Analyzer or personal computer via GPIB/
IEC625/IEEE488 interface
<0.02 dB
balanced, 3pole CF
Connector
Interface
IEEE 488 connector
Self-testandlevelcalibration
Triggered automatically by opening the measure-
ment menu
Accessports(Ch1toCh30)
Generalspecifications
Powersupply
External adapter with AC line cord
AC supply
Power consumption
(One adapter can supply both the PCM-40
and PCS-40)
Balanced through-switching of up to
30 VF channels in Tx and Rx directions
Connector DIN 41612 type socket, 64-way,
female
Codecinterface/handsetinterface
Input/output impedance
Connector
600 W
RJ11
100 to 240 V, 50 to 60 Hz
Switching time
<10 ms
10 VA
64kb/sinterface(optional)
Returnlossmeasurement
Built-in bridge for return loss measurements
on a selectable VF channel
Measurement range
Frequency range
Accuracy
0 to 30 dB
30 to 45 dB
Reference impedance
internal
external (connected to auxiliary
input)
Max. input level
200 Hz to 300 Hz
300 Hz to 4 kHz
Output/input
to ITU-T Rec. G.703
Modes
codirectional, contradirectional
120 W
Ambienttemperature
Balanced output
Connector
Clock output
Connector
0 to 45 dB
200 Hz to 4 kHz
Nominal range of use
Limits range of use
(for 2 hours)
+5 to +45 °C
balanced, 3pole CF
120 W
balanced, 3pole CF
0 to +55 °C
-40 to +70 °C
1 dB
2 dB
Storage and transport
Generalspecifications
Airhumidity
Nominal range of use
600 W
20 to 80 %,r.h.
ControlcomputerforPCM-40
PC AT 486
WIN 3.1, WIN 95, 98, NT
min. 600 kB free conventional memory
min. 256 kB free EMS memory
min. 40 MB free HD space
(<20 g/m3 absolute)
600 to 900 W
Dimensions
(l × w × h in mm)
Weight
290 × 230 × 70
approx. 2 kg
-6 dBm
0 dBm
VGA monitor (color or monochrome)
serial or GPIB (National Instruments) interface
PCM-40 PCM Channel Analyzer
Orderinginformation
EL 3039/01
PCM-40 Channel Analyzer
Including AC adapter, RS232C/V.24 cable and operation manual (in English)
A separate PC is required for operation
EL 3039/60
Calibration report for PCM-40
EL 3039/20
PCS-40 Channel Selector
Including return loss and longitudinal conversion loss (LCL) measuring bridge, DC current loop and
DC feeding bridge, cables for interconnection of PCM-40 and PCS-40, 64-way female connector set
for accessing PCM MUX and operation manual (in English)
Options
EL 3039/01
64 kb/s interface
(for codirectional/contradirectional clock) for BERT and D&I
EL 3039/02
Impedance modification
(replaces complex impedance)
Accessories
EL3043/01
EL 2237/01
GH-1 DC Loop Holding/Line Feeding, OC Loop Holding ELH-2
Nylon carrying case
(for PCM-40, Notebook PC and accessories)
EL 3039/203
EL 3039/201
EL 3039/202
Documentation
EL 3039/83
64-way female connector set for PCS-40
IEEE interface cable for PCS-40
AC adapter for PCS-40
Service manual for PCM/PCS-40 (in English)
All statements, technical information and recommendations related to the products herein are based upon infor-
mation believed to be reliable or accurate. However, the accuracy or completeness thereof is not guaranteed, and
no responsibility is assumed for any inaccuracies. e user assumes all risks and liability whatsoever in connec-
tion with the use of a product or its applications. JDSU reserves the right to change at any time without notice
the design, specifications, function, fit or form of its products described herein, including withdrawal at any
time of a product offered for sale herein. JDSU makes no representations that the products herein are free from
any intellectual property claims of others. Please contact JDSU for more information. JDSU and the JDSU logo
are trademarks of JDS Uniphase Corporation. Other trademarks are the property of their respective holders.
© 2006 JDS Uniphase Corporation. All rights reserved. 30137187 501 0707 PCM-PCS40.DS.CPO.TM.AE
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