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ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance
2-231
© 2000, ADC Telecommunications, Inc.
DLP-572
Page 1 of 1
VERSION D (OR LATER) HLXC VOLTAGE TO HLXR TEST
Summary:
This procedure provides instructions for measuring DC voltage and DC current being
supplied by the Version D (or later) HLXC to the Version D (or later) HLXR. The V+, V–, I+,
and I– jacks provide monitor access to the voltage and current supplied to the HDSL Repeater
(HRX) (if present) and HLXR through the HDSL span. Current measurements are taken as the
voltage drop across a 10 ohm resistor.
Measure DC Voltage
1. Select –VDC on the VOM and, if so equipped, select a voltage scale of 300 volts or higher.
2. Refer to Figure 572-1. Insert the black test probe into the V– test jack, and insert the red
test probe into the V+ test jack. A typical meter reading should be approximately 130 VDC
(with no HRX present), or approximately 260 VDC (with HRX present).
Measure DC Current
Note:
The current test is not available on the Version G module.
3. Select –VDC on the VOM and, if so equipped, select the millivolt scale.
4. Insert the black test probe into the I– test jack, and insert the red test probe into the I+ test
jack. The millivolt reading divided by 10 is the DC current in milliamps.
Stop! You have completed this procedure.
LPBK
STAT
H
L
X
V -
I-
I+
V+
L1
L2
HDSL
RMT/
HSKP
LOSW
BER
LOSW
BER
DS1
LOS
BER
CONT
SNR
6770-A
11395-A
LPBK
STAT
H
L
X
V-I-
I+ V+
L1
L2
HDSL
RMT/
HSKP
LOSW
BER
LOSW
BER
DS1
LOS
BER
CONT
SNR
2X
STAT
H
L
X
LPBK
LOS
BER
DS1
H
D
S
L
L1
L2
V–
V+
CONT
SNR
LOSW
BER
LOSW
BER
RMT/
HSKP
12391-A
2X
Version D HLXC Version E HLXC Version G HLXC
Figure 572-1. HLXC Module Front Panels