ICS N4865A, Instruction Manual

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1.7 INDICATORS
The N4865A has eight front panel LEDs that normally display the following
conditions:
PWR - Indicates power on
LAN - Indicates the unit is connected to an active Ethernet
oscilloscope or to the network.
ACT - Indicates activity over the Ethernet connection.
RDY - Blinks at a 1 Hz rate while doing an AutoFind of the
oscilloscope. Blinks at a 2 Hz rate while looking for the
oscilloscope at a designated IP address. Solid on indi-
cates the unit has passed self test and is linked to a LAN
oscilloscope.
TALK - Indicates the unit is an active GPIB Talker.
LSTN - Indicates the unit is an active GPIB Listener.
SRQ - On when the N4865A has received a Service Request and
is asserting SRQ on the GPIB bus.
ERR - Solid on when the N4865A runs into a problem that
prevents it from continuing.
When the N4865A is turned on, it performs an internal selftest which takes
about 4 seconds. Only the PWR LED is on during self test. At the end of a
successful selftest, the N4865A blinks its GPIB address for 2 seconds. The
LED bit weights are:
RDY TALK LSTN SRQ ERR
16 8 4 2 1
If DHCP is selected, the N4865A will wait 15-20 seconds for a DHCP server
response before defaulting to its Auto IP address. It then starts looking for a
companion oscilloscope. If the N4865A is connected to a network or oscil-
loscope, the LAN LED turns on and the ACT LED displays the N4865A's
network activity.
If the N4865A fi nds a selftest error, it blinks the error code on its front panel
LEDs. Refer to paragraph 5.4 for a description of the selftest errors and their
possible causes.