Agilent Technologies 8935 Series Bedienungsanleitung PDF herunterladen (Seite 23)

Chapter 1 23

Using HP-IB

Overview of the Test Set

Manual Control Mode

The Test Set’s primary instruments are shown on the left side of Figure

1-1 on page 28. There are two classes of instruments in the Test Set:

signal analyzers (RF Analyzer, AF Analyzer, Oscilloscope, Spectrum

Analyzer) and signal sources (RF Generator, AF Generator #1, AF

Generator #2).

Since so many instruments are integrated into the Test Set, it is not

feasible to have an actual “front panel” for each instrument. Therefore,

each instrument’s front panel is maintained in firmware and is

displayed on the display whenever the instrument is selected. Only one

instrument front panel can be displayed at any given time (up to four

measurement results can be displayed simultaneously if desired). Just

as with stand alone instruments, instrument front panels in the Test

Set can contain instrument setting information, measurement result(s),

or data input from the DUT (Device Under Test).

Using the Test Set in Manual Control mode is analogous to using a set

of bench or rack-mounted test equipment. To obtain a measurement

result with a bench or racked system, the desired measurement must be

“active.” For example, if an RF power meter is in the bench or racked

system and the user wishes to measure the power of an RF carrier they

must turn the power meter on, and look at the front panel to see the

measurement result. Other instruments in the system may be turned

off but this would not prevent the operator from measuring the RF

power.

Conceptually, the same is true for the Test Set. In order to make a

measurement or input data from a DUT, the desired measurement field

or data field must be “active.” This is done by using the front panel

keypad/rotary knob to select the instrument whose front panel contains

the desired measurement or data field and making sure that the

desired measurement or data field is turned ON.

Figure 1-1 on page 28 shows that instrument selection is handled by

the screen control hardware which routes the selected instrument’s

front panel to the display. Once an instrument’s front panel is displayed

on the display, the user can manipulate the instrument settings, such

as turning a specific measurement or data field on or off, using the

keypad/rotary knob. Figure 1-1 also shows that instrument setup is

handled by the Instrument Control hardware which routes setup

information from the front panel to the individual instruments.

An HP-IB/RS-232/Parallel Printer interface is located in the Test Set.

In Manual Control mode this provides the capability of connecting an

external HP-IB, serial, or parallel printer to the Test Set so that display

screens can be printed.

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