Agilent Technologies 85330A service manual Fast Source Control, Source settings

Programming

Fast Source Control

Description

To Use this Configuration

Fast Source Control

Fast source control speeds up frequency switching speed in multiple-frequency measurements. It is only available in 85309A-based systems. This mode uses TTL signals to increment RF and LO source frequency, providing faster frequency switching speeds than are possible under 8530A control.

Refer to the programming “Example 3” on page 6-29.

In the fast source control configuration, the system’s computer must set up the sources with appropriate frequency settings, triggering mode, and so on. When automatic run-time measurement mode is engaged, the 85330A automatically increments the RF and LO source frequencies using TTL lines. When being controlled by a computer, the SCPI language mode must be selected. This is shown in Figure 1-3 on page 1-5.

Fast Data Acquisition can be used in this configuration. Use the 8530A Fast Autoranging Data Mode (GPIB command: FASAD), as explained in Chapter 8 of the Agilent 8530A User’s Guide.

8530A settings

In the 8530A Local menu, the addresses for Source 1 and Source 2 must be set to 31. This tells the 8530A that it cannot communicate with the sources.

85330A settings

Since the 8530A does not control the sources, set the multiple channel controller to TTL triggering mode:

RUNT:SOUR:SOURCE1:TRIG TTL;

RUNT:SOUR:SOURCE2:TRIG TTL;

Source settings

•Use Frequency List or Step mode.

•Sweep Point Trigger must be set to EXT:

SWE:TRIG:SOUR EXT;

•Start Sweep Trigger must be set to AUTO:

TRIG:SOUR IMM;

The Sweep Point Trigger and Start Sweep Trigger settings allow external triggers from the 85330A to trigger the sources.

6-8 85330A Multiple Channel Controller