Instruction Manual

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4 COMPUTER INTERFACE

The 507 comes standard with an RS232 serial interface; a GPIB (IEEE-488) interface

is available as an option. All menu settings can be set and retrieved over the

computer interface using a simple command language.

Serial (RS232) Pinout

The serial port is located on the back of the 507, and uses a 9-pin D-type connector

with the following pinout (as viewed from the back of the 507):

1. No connection

2. Tx - Transmit (to computer)

3. Rx - Receive (from computer)

4. DTR - connected to pin 6

5. Ground

6. DSR - connected to pin 4

7. RTS - connected to pin 8

8. CTS - connected to pin 7

9. No connection

The voltage level of the Transmit signal is +/-10V, the Receive signal should be at

least +/-5V.

GPIB

An optional GPIB (also known as IEEE-488) computer interface is available for the

507. Before using this interface, the address must be set using the GPIB Address

menu item. The same command set is used for both the GPIB and RS-232 interfaces.

Both interfaces may be used at the same time. Responses will be made to the most

recently used interface.

Command Language

All menu items can be accessed and selected via the computer interface using a

simple command language. The command set is the same for both the RS232 and

GPIB interfaces.