Operating and Programming

3

Table 3-1. L4400 LED Definitions and Instrument Status.

LED

 

Color

Condition

 

 

 

 

ATTN

Off

 

Instrument is not turned on, and may or may

LAN

Off

 

not be connected to line power.

PWR

Off

 

 

 

 

 

ATTN

flashing

Power-on/boot-up. ATTN and LAN will flash

LAN

flashing

red and then green during the power-on

PWR

Green

 

self-test.

 

 

 

 

ATTN

Off

 

LAN connection

LAN

Green

 

- instrument has an IP address

PWR

Green

 

 

 

 

 

 

 

ATTN

Off

 

Instrument identification. Activated from

LAN

Green

(flashing)

instrument Web interface:

PWR

Green

 

 

ON: Turn on Front Panel Interface Indicator

 

 

 

 

 

 

OFF: Turn off Front Panel Interface Indicator

 

 

 

 

ATTN

Off

 

No LAN connection due to:

LAN

Red

 

- disconnected LAN cable

PWR

Green

 

 

- failure to acquire an IP address

 

 

 

 

 

 

- waiting for DHCP-assigned address

 

 

 

ATTN

Red (flashing)

Instrument programming error or self-test

LAN

Green

 

error. Error queue is read using

PWR

Green

 

 

SYSTem:ERRor?

 

 

 

 

 

 

 

ATTN

Green

(flashing)

Instrument Busy State

LAN

Green

 

- firmware download

PWR

Green

 

 

- lengthy instrument operation in progress

 

 

 

 

 

 

 

L4400 User’s Guide

49

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Image 59
Agilent Technologies manual L4400 LED Definitions and Instrument Status, Color Condition