Wandel & Goltermann PCM-3 Communications Test Set
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Modello:
PCM-3
Data:
1979
Categoria:
Gruppo:
Descrizione:
Tipo di manuale:
Manuale d'uso
Pagine:
117
Dimensione:
87.31 Mbytes (91555429 Bytes)
Lingua:
english
Revisione:
ID del manuale:
0.2.1 .80 2650 GN V . 2596
Data:
1979 01 01
Qualità:
Documento scansionato, la lettura in parte male, non in parte leggibile.
Data caricamento:
2017 01 21
MD5:
c0c0abcae08eb6e92fc2688fda6c88a1
Scaricamenti:
778
Informazioni
Description and Operating Manual
INTRODUCTION
1.
SPECIFICATIONS ... 1-1
1.1. Operating
function ... 1-1
1.2. Test object
matching ... 1-1
1.3. Send
signals ... 1-2
1 .4. Summary of measurement modes, level ranges and
frequency ranges 1-4
1.5. Use as level Generator or as level
meter ... 1-5
1 .6. Measurement modes and their error limits in the preferred
range of relative level and for Generator terminated by Z
and receiver fed by Z source =
0 ... 1-5
1.7. Attenuation characteristic of the
filters ... 1-10
1.8. Additional inputs and outputs (rear
side) ... 1-13
1.9. Measuring
sequence ... 1-13
1.10. Additional
devices ... 1-16
1.11. General
data ... 1-18
1.12. Ordering
information ... 1-20
2.
OPERATION ... 2-5
2.1. Setting-up and putting into
service ... 2-5
2.1.1. Setting-up the
instrument ... 2-5
2.1.2. Operating
controls ... 2-5
2.1.3. A.C. line
connection ... 2-5
2.2. Prel iminary
settings ... 2-6
2.2.1. Operating
functions ... 2-6
2^2.2. Matching to the object under
test ... 2-7
2.2.2. 1. Setting relative
level ... 2-7
2.2.2.2. Generator output; output
impedance ... 2-7
2.2.2.3. Receiver input/ input
impedance ... 2-8
2.3. Test set-up and connection of objects under
test ... 2-8
2.3.1. Loop
measurements ... 2-8
2.3.2. End-to-end
measurements ... 2-9
2.3.3. Separate measurement of the send or receive part of a
PCM multiplex
equipment ... 2-10
2.3.4. Measurements on a test object with digital interfaces
. . . 2-11
2.3.5. Connection through the Test Point Scanner MU-3 ... 2-11
2.4. Measurement modes of the
PCM-3 ... 2-12
2.4.1. Summary of measurement
modes ... 2-13
2.4.2. Explanation of particular measurement
modes ... 2-15
2.4.2.1. Overall
loss ... 2-15
2.4.2.2. Attenuation/frequency
distortion ... 2-16
2.4.2.3. Variation of gain with input
level ...
2-16
2.4.2.4.
Crosstalk ... 2-16
2.4.2.5. Impedance balance
ratio ... 2-16
2.4.3. Measurement mode
number ... 2-17
2.4.4. Single measurement and incremental step measurement .
. . 2-17
2.4.5. Block measurement and measuring
program ... 2-18
2.5. Data
entry ... 2-18
2.5.1. Entry of a single measurement
... 2-19
2.5.1.1. Selection of measurement
mode ... 2-19
2.5.1.2. Entry of send
parameters ... 2-22
2.5.1.3. Run of single
measurements ... 2-23
2.5.1.4. Measurement by incremental
step ... 2-23
2.5.2. Entry of a block
measurement ... 2-24
2.5.2.1. Selection of measurement
mode ... 2-24
2.5.2.2. Indication of the send parameters and tolerance
limits . . .2-25
2.5.2.3. Run of block
measurements ... 2-25
2.5.3. Entry of a measuring
program ... 2-26
2.5.3.1. Assembly of the
program ... 2-26
2.5.3.2. Change of
program,clear ... 2-27
2.5.3.3. Program configuration and
execution ... 2-27
2.6. Measurement sequence
conditions ... 2-31
2.6.1. Measurement run
switch ... 2-31
2.6.2. Halt
switch ... 2-31
2.6.3. Print
release ... 2-32
2.7. Indicator
area ... 2-33
2.7.1. Measurement run
information ... 2-33
2.7.2. Measurement mode
display ... 2-34
2.7.3. Send parameter
display ... 2-34
2.7.3.1. Send level
indicator ... 2-34
2.7.3.2. Send frequency
indicator ... 2-35
2.7.3.3. Additional
symbols ... 2-35
2.7.4. Measured result
display ... 2-36
2.8. Rear
connections ... 2-37
2.8.1. A.C. voltage
output ... 2-37
2.8.2. Receiver
input ... 2-37
2.9. Additional devices (Plug-in
subassemblies) ... 2-38
2.9.1. Printer
interface ... 2-38
2.9.2.
lEC-Bus-interface ... 2-40
2.9.3. End-to-end and signal ling distortion measuring
device . . .2-41
2.9.3.1. End-to-end measuring
device ... 2-41
2.9.3.2. Signalling distortion measuring
device ... .2-41
2.9.4. Interface for PDA-3, PDG-3,
MU-3 ... 2-44
TECHNICAL
INSTRUCTIONS ... 3-1
3.1 . Extension to the Automatic Measuring System PA-3 ... 3-1
3.1.1. Setting-up instruments and connecting
cables ... 3-1
3.1.2. Instrument
adjustments ... 3-1
3.1 .3. Measurement run and indication of
results ... 3-5
3.1.4. Computer
control ... 3-5
3.2. Characteristics of the Digital Signal Instruments PDA-3
and
PDG-3 ... 3-5
3.2.1. PCM DigitaI SignaI Analyzer
PDA-3 ... 3-6
3.2.2. PCM Digital Signal Generator
PDG-3 ... 3-6
3.3. Consideration of CC ITT Recommendation G.712
as affecting
PCM-3/PA-3 ... 3-7
3.3.1. Attenuation/frequency
distortion ... 3-8
3.3.2. Variation of gain with input
level ... 3-8
3.3.3. Measurement of idle channel
noise ... 3-9
3.3.4. Total distortion, including quantizing
distortion ... 3-10
3.3.5. Interchannel
crosstalk ... 3-11
3.3.6. Go-to-return crosstalk or level in own
channel ... 3-13
3.3.7. Impedance of audio input and output
parts ... 3-14
3.3.8. Out-of-band signals at the channel
input ... 3-14
3.3.9. Spurious out-of-band signals at the channel output
... 3-15
4. FUNCTION AND
CHARACTERISTICS ... 4-3
4.1. Send
section ... 4-3
4.2. Receive
section ... 4-4
4.3. Digital
section ... 4-7
4.4. End-to-end and signa I ling distortion measuring device
. . . 4-10
5. FUNCTION CHECKING, MAINTENANCE AND
GENERAL
INFORMATION ... 5-1
5.1. Function
checking ... 5-1
5.1.1. Short test of digital
section ... 5-1
5.1.2. Short test of measuring
section ... 5-1
5.1 .3. Further checks on measuring
sections ... 5-2
5.1 .4. Operation of PCM-3 as level Generator
only ... 5-3
5.1.5. Operation of PCM-3 as Level Meter
only ... 5-4
5.1.6. Additional test
modes ... 5-4
5.2. Maintenance and general
information ... 5-5
5.2.1. Mechanical
assembly ... 5-5
5.2.2. Insertion of Plug-In
subassemblies ... 5-6
5.2.3. Changing the customer program
memory ... 5-6
5.2.4. Conversion from dBm to dB
calibration ... 5-6
5.2.5. Changing
fuses ... 5-8
5.2.6. Modification of the measuring signal for signalling
distortion . 5-8
5.2.7. Use in 19-inch
racks ... 5-8
5.2.8. Shipping
instructions ... 5-10
5.2.9. Matching to the V.24 Printer
Interface ... 5-11
5.2.9.1 . Baud
rate ... 5-12
5.2.9.2. Acknowledgements from the
printer ... 5-12
5.2.9.3. Waiting (Standby) Time during "CR" and
"LF" ... 5-12
5.2.9.4. Interface
testing ... 5-13
5.2.9.5. Matching to special properties of a
printer ... 5-13