Agilent Technologies L4400 - Manual (Page 61)

Operating and Programming 3
L4400 User’s Guide 49
Table 3-1. L4400 LED Definitions and Instrument Status.
LED Color Condition
ATTN
LAN
PWR Off
Off
Off Instrument is not turned on, and may or may
not be connected to line power.
ATTN
LAN
PWR flashing
flashing
Green Power-on/boot-up. ATTN and LAN will flash
red and then green during the power-on
self-test.
ATTN
LAN
PWR Off
Green
Green
LAN connection
- instrument has an IP address
ATTN
LAN
PWR Off
Green (flashing)
Green Instrument identification. Activated from
instrument Web interface:
ON: Turn on Front Panel Interface Indicator
OFF: Turn off Front Panel Interface Indicator
ATTN
LAN
PWR Off
Red
Green
No LAN connection due to:
- disconnected LAN cable
- failure to acquire an IP address
- waiting for DHCP-assigned address
ATTN
LAN
PWR Red (flashing)
Green
Green Instrument programming error or self-test
error. Error queue is read using

SYSTem:ERRor?
ATTN
LAN
PWR Green (flashing)
Green
Green
Instrument Busy State

- firmware download
- lengthy instrument operation in progress