Agilent Technologies 75000 SERIES B, E1301B, E1300B user manual Using the Mainframe, Using the Pacer

Chapter 4

Using the Mainframe

Using this Chapter

This chapter shows how to use the mainframe’s Pacer function, how to change the primary GPIB address, and how to synchronize internal and external instruments using the mainframe’s Event In and Trigger Out ports. This chapter also discusses how mainframe memory is used by installed instruments. Where possible, examples show only the command string sent to the instrument (no information about a computer language or interface is shown). Examples that require showing a computer language are written for HP 9000 Series 200/300 Computers using BASIC language and the GPIB interface. This chapter contains the following sections:

• Using the Pacer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

• Changing the Primary GPIB Address . . . . . . . . . . . . . . . . . . . . . 4-3

• Synchronizing Internal and External Instruments . . . . . . . . . . . 4-3

• Mainframe Data Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Using the Pacer

The Pacer generates a square wave signal on the mainframe’s rear panel Pacer Out connecter. The signal levels are standard TTL levels (0V to 5V). The Pacer signal can be used to trigger or pace external equipment such as scanners or voltmeters. Figure 4-1 shows a single cycle of the Pacer output with a specified period of 1 second.

The following SCPI commands control the Pacer:

Figure 4-1. Pacer Out Square Wave

Using the Mainframe 4-1