Agilent Technologies L4400 manual Ext Trig/Alarms/DIO Port, Gpib Connector, LAN Port, Alarm Usage

Operating and Programming 3

Ext Trig/Alarms/DIO Port

The external trigger, alarms, and DIO port enables you to synchronize scanning between a switching instrument such as the L4421A and an external DMM. The port also allows you to output alarm signals to an external device or control system. Figure 3- 4 shows the pin out and signal definitions for the port.

Channel advance input
(Trig In - pin 6)
1	5
6	9

External Trigger Usage

Input

5V

0V

> 1 µs

Output

3.3V

0 V

Channel closed output (Trig Out - pin 5)

1

6

Gnd (pin 9) Alarm Usage

Alarm 1 output (pin 1) Alarm 2 output (pin 2)

5

9

Gnd (pin 9)

or

Approx. 2 µs

Figure 3-4. External Trigger and Alarm Port Pin Definitions.

GPIB Connector

The GPIB interface is available on all L4400 series instruments as Option- GPIB. This option must be purchased with the product. Products not ordered with the GPIB interface cannot be reconfigured to add it later.

LAN Port

The LAN port on the L4400 series instruments supports 10 Mbps and 100 Mbps data transfer rates (10BaseT/100BaseTx). The port is Non Auto- MDIX which means that the LAN crossover cable supplied with the instrument

L4400 User’s Guide 51