Spirent DLS 6700, Operating Manual

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DLS 6700 Operating Manual
Page 2-2 7104000557 Spirent Communications
are greater than -140 dBm /Hz, they will limit the ADSL2++ performance and influ-
ence the test results. These devices should be placed at a distance from the test setup
or even switched off.
The interconnection wiring for the “Output” and “Input” Ports should be physically
separated as crosstalk can occur between cabling. Configure the cables so that they
are not touching and the cable connecting to the DSLAM and CPE are separated as
much as possible (at least 15 cm).
2.4 Front Panel Indicators
The DLS 6700 chassis has 2 LEDs which indicate the power and remote status.
The Power LED indicates when the unit is on, and doubles as an error status indica-
tor.
The Remote LED indicates when the DLS 6700 has received a command from the
control computer.
Figure 2.1 DLS 6700 Front Panel
2.4.1 Reading Remote and Power Status
The POWER LED turns green when the power is turned on. The power LED blinks red
if it fails its self-test, or solid red if it detects an internal error.
The REMOTE LED is off after a power-up or a reset. When the unit receives the first
remote message, the REMOTE LED turns green if the command is valid or turns red if
an error is detected. An invalid command or an out-of-range value will cause an error.
The REMOTE LED stays red until the error flags are cleared (see the command *ESR?
for more details). When the REMOTE LED is red, the unit can still communicate as
normal, but you should investigate why the error occurred. Chapter 4 "REMOTE CON-
TROL" shows examples on how to read the ESR register, clear the error flags and
make the REMOTE LED green once error conditions have been resolved.
2.5 Rear Panel Connections
All connectors for the DLS 6700 are located on the rear panel (see Figure 2.2 "DLS
6700 Back Panel")
S I T
.
DLS 6700
ADSL2++
Multiline Production Wireline Simulator
spirentcom.com
POWER REMOTE