Kurth Electronic KE3600, Руководство по эксплуатации

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Help
Help
Help
Date / Time
Date / Time
Date / Time
Return Loss
Balance
NEXT Measurement
Frequency 9,99 kHz
Frequency 9,99 kHz
Frequency 9,99 kHz
a/b: 0,0 V
a/b: 0,0 V
a/b: 0,0 V
59,6
88,3
133
32,4
75,6
116
5,2
63,0
98,1
5,00 kHz
5,00 kHz
5,00 kHz
Attenuation -0,27 dB
Balance 877 dB
Crosstalk 1,12 dB
dB
dB
dB
8,33 kHz
8,33 kHz
8,33 kHz
11,7 kHz
11,7 kHz
11,7 kHz
15,0 kHz
15,0 kHz
15,0 kHz
100 W
Impedan.
100 W
Impedan.
100 W
Impedan.
Operating Manual KE3600 xDSL M
ULTI
T
EST
Return Loss
The line attenuation is the reduction of the energy of a signal
transmitted over a transmission path and thus is a key value for
DSL. The longer the cable, the lower the achievable data rates
of DSL technologies.
Measurement method
Select the mode Attenuation and press SEL. The signal can be
transmitted with different impedance values, these can be
selected under F2 Impedance. Min, the lower value and with
Max the upper value of the graphic are pre-defined.
Measurement results
The measurement results are both graphic and numeric
available and are displayed simultaneously. Indicated is the
frequency in Hz and the attenuation in dB.
Transmit Signal will show you how to generate test
signals for attenuation measurements.
Balance
Longitudinal currents can cause noise on the line, if the
symmetry is imperfect.The line balance is the ability of the line
to suppress the effect of longitudinal currents.
The KECT3 performs the measurement with the help of the
ITU-T recommended test circuit.
Measurement method
Select the mode Balance and press SEL. The signal can be
transmitted with different impedance values, these can be
selected under F2 Impedance. Min, the lower value and with
Max the upper value of the graphic are pre-defined.
Measurement results
The measurement results are available both graphically and
numerically and are displayed simultaneously. Indicated is the
frequency in Hz and the attenuation in dB.
NEXT Measurement
The transmission quality and thus the transmission capacity of
a DSL system is strongly affected by the near-end crosstalk
(NEXT). The KECT3 sends a known signal on Line 1 and
measures the received signal on line 2. If the NEXT value is out
of range, there may be a wire twist problem (split pairs). These
can be located with the TDR. (See TDR measurements)
30
KURTH ELECTRONIC www.kurthelectronic.de info@kurthelectronic.de
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