Manual

20
PoE/PoE++ Test (according to IEEE802.3af/at/bt)
(Ethernet cable only)
Connect the KE7200 to the network. Start the test with the SEL key. The KE7200 activates the
PoE port and outputs the corresponding information in the display regarding whether PoE/PoE+/
PoE++ is present or not.
The PoE standards are displayed according
to the expected nominal voltages.
Higher voltages (fault conditions) can dam-
age the instrument and pose a potential
safety hazard.
If PoE can be activated, this will happen. To begin with, the
max. load is applied to remove the cable charge. The max-
imum available power is then measured according to the
IEEE802.3af/at/bt standard. This regulates which voltage
must be present on the line when a certain current is owing.
If this voltage is below the standard value, the KE7200 will switch the load back until the voltage
is within the normal range again.
This power is calculated and then displayed. This information is important in any network with
PoE subscribers, as disturbances will occur again and again due to the load on the power supply
in the switch being at the limit. If a small additional load is now added, such as due to changed
operating conditions like the switching on of infrared illumination, the network will collapse and
the switch will only supply the emergency power. This cannot be detected without appropriate
test equipment. Some PoE switches also provide 30 W per port. These then work outside the
specication.
The test will need to be restarted for each measurement.
IP Test, Including Network Speed and Ping Test
(Ethernet cable only)
During the network test, the KE7200 can search the network
for IP addresses and thus subscribers. This can be done in
DHCP mode or with a xed IP address. If the network also
monitors MAC addresses, the MAC address of the KE7200
can be adapted (see page 12).
The DHCP mode is rst activated by selecting IP Test >
DHCP Request. As soon as a network connection is estab-
lished, it is displayed in the status line, and the IP address
assigned to the KE7200 by DHCP is displayed. The request
for occupied IP addresses in the assigned address space
starts immediately. The number found is also displayed.
The KE7200 now queries all addresses for information and lists it. If names are available, they
are displayed – if not, only the IP address.
This process can take some time, especially if there are many subscribers in the network. You
can see the progress by the change in the IP addresses found. At the top of the screen, Net-
work is displayed. Selection with SEL shows general network information such as Connection
Speed, own IP Address, and Network Mask. The ▼ key scrolls to the next page. This will
display the following:
• Domain name of the network
• IP of the DNS server
Ethernet performance tester
KE7200
PoE/PoE++ Test
ESC
end
Alternative A+B
Line voltage:
57.9V
Max power
90 Watt
Ethernet performance tester
KE7200
Ethernet: 100Mbit at 1GBit Port
Number of resources:
77
Determining names
ESC
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