When the MULTIPLE SOURCE menu is selected, the Multiple Source Tableau Dialog appears at the bottom of the main display area.

Select toggles multiple source capability to off or on and sets the Rcvr Config to Multiple Source.

Present Simple or Complete Multiple Source menu.

Select adds a frequency band to the multiple source tableau at the bottom of the display.

Select a row in the frequency band tableau at the bottom of the display. Click the Delete Band button to permanently delete it.

Select deletes all band entries in the tableau.

If no changes have been made to the frequency band settings, this button is unavailable.

Once changes are made, the button becomes available.

When all changes are complete, select the Done Editing button to apply the frequency band changes (additions, edits, and deletions) to the current running measurement and its attached test sets and modules.

After the change have been applied, the button again becomes unavailable.

If the button is not selected, the changes are not applied to the instrument.

Select displays the EXT. SRC CONTROL menu.

Select displays the INT. SRC CONTROL menu. This menu is not available when any of the TMS modes are active. When TMS mode is active, the internal sources are controlled by the TMS mode settings. Refer to DifferentialView™ (True Mode Stimulus) for information on TMS configuration.

Select displays the EXT SRC FAST TRIGGER dialog box where the trigger mode can be enabled or disabled. The button shows the current fast trigger mode.

The button displays the current broadband setting as either OFF, mmWave [3738], mmWave [3739], Broadband to 125 GHz, Broadband to 145 GHz, E-Band 56 GHz to 96 GHz, or W-Band 65 GHz to 110 GHz.

Select displays the EXTERNAL MODULE CTRL dialog box. The dialog box allows the module type to be set as OFF, mmWave [3738], mmWave [3739], Broadband to 125 GHz, Broadband to 145 GHz, E-Band 56 GHz to 96 GHz, or W-Band 65 GHz to 110 GHz which also depends on the connected equipment and installed options. If any configuration other than OFF is selected, additional configuration parameters are available for each defined band. The dialog box content depends on the broadband mode and the number of bands selected. Sample dialogs for some configurations are shown below:

Select toggles the phase inversion function off and on.

Select toggles the Power Cal Reference Plane between System Frequency and Source Equation.

For a given multiple source setup, there are a number of different physical configurations that exist and the user may desire to perform power calibrations at different frequency reference planes.

For example, if Source 1=(1/4)*(f) and the DUT is a multiplier, one would want to power calibrate the source at the (1/4)*(f) plane. With the same equation but with the VNA source driving a mmWave module used for amplifier measurements, one may instead want to power calibrate the source at the f plane.

Thus some flexibility in what plane the user power calibration routine uses (in terms of what power meters the system looks for and what frequency is programed into the power meter) is desirable. This switch defines that reference plane.

The multiple source tableau is available at the bottom of the screen when the MULTIPLE SOURCE menu is selected. Typical Complete and Simple examples are shown below.

Bands are added by selecting the Add Band button on the MULTIPLE SOURCE menu. Up to 50 Bands can be added. Each band can be defined for any combination of the following sources:

Bands are added by selecting the Add Band button on the MULTIPLE SOURCE menu. Up to 50 Bands can be added. Each band can be defined for any combination of the following sources:

The following general operation notes and requirements apply:

Where:

Where:

Band management is done by using the Add Band, Delete Band, and Clear All Bands button. After all bands are configured, select Done Editing button to apply the setting to the instrument and its attached equipment.

A multiple source band configuration can be saved by using MENU BAR | File | Save Setup. On the SAVE SETUP dialog box, the setup can be saved as a:

Recall previously saved setups by using MENU BAR | File | Recall Setup.

File operations are duplicated on the FILE menu at MAIN | File | FILE.

External Source Control

The RF of External Sources is not automatically turned on. See the installation and configuration procedure below this figure.

When IMDView is active, any external source which is being used for a tone in IMDView is disabled.

For External Source 1, opens the EXT. SRC1 STATE menu, which toggles the State from active to inactive.

See the procedure section below this figure a more detailed description.

If in Modular BB mode, each external source is turned on/off manually from this menu.

If in BB/mmWave mode, and external source is set to ON, Source 1 and Source 2 are automatically set to Active.

For External Source 2, select opens the EXT. SRC STATE menu.

For External Source 3, select opens the EXT. SRC STATE menu.

For External Source 4, select opens the EXT. SRC STATE menu.

This description applies to the EXT. SRC1 STATE menu described in Figure: EXT. SRC CONTROL (EXTERNAL SOURCE CONTROL) Menus:

In this section, these buttons are referred to as the External Source State buttons.

If the External Source State buttons are Inactive and Unavailable (grayed out), either no external sources are connected to the instrument, or the external sources have different GPIB addresses from those set on the VNA instrument. Once one or more external sources are connected with matching GPIB addresses, the buttons change to Inactive and Available (not grayed out).

Connect from one (1) to four (4) external sources via the rear panel Dedicated GPIB Port D-24 (f) Connector.

This GPIB port is used when the VNA instrument controls external instruments such as power meters, frequency counters, and in this case, external sources. Up to four (4) external sources can be connected to the instrument.

Note that each external instrument and the VNA must have a unique GPIB address with no duplicates. The factory-default GPIB addresses for the four external sources and other likely external instruments are:

The default addresses for external sources can be changed at the EXT. SRC. ADDR. (EXTERNAL SOURCE ADDRESS) menu

The default addresses for the instrument itself, the external power meter, and the external frequency counter can be changed at the REMOTE INTER. menu.

The GPIB addresses set on the VNA instrument must match those set on each external source.

If the GPIB addresses set on the VNA match those on the external source, the appropriate External Source State button should change from unavailable (grayed out) to available. Once an External Source State button is available, it can be used to toggle the external source between Inactive and Active.

Note that the EXT. SRC. CONTROL menu does not refresh itself if address changes are made in any of the external sources. If in doubt about the state of connected external sources, click the Back button at the bottom of the display, and then re-enter the menu.

This menu can be accessed from multiple locations.

Internal Source Control

Initiates the dual source drive at both ports. As shown, the setup includes identification of two internal sources that can be set to “Auto” or “Manual” mode. In “Manual” mode, they are either “Active” (always on) or “Inactive” (always off). The setting of the internal sources is controlled via the Multiple Source Tableau Dialog.

When IMDView is active, any internal source which is being used for a tone in IMDView is disabled.

For Internal Source 1, opens the INT. SRC1 STATE menu, which allow setting the state as auto, active, or inactive.

For Internal Source 2, opens the INT. SRC2 STATE menu, which allow setting the state as auto, active, or inactive.

When Common Offset Mode is ON, both the LO and Source signals are referenced to a common oscillator. When Common Offset Mode is OFF, the LO and Source signals are referenced to independent oscillators. The factory phase calibration is performed with Common Offset Mode ON.

Requires Internal Sources to be ~ < 15 MHz from the receiver.

Spur Avoidance uses a modified frequency algorithm to offset known system spurs outside of the measurement. The factory phase calibration is performed with Spur Avoidance OFF.

Toggles the phase synchronization state from OFF to ON. When ON, the two internal sources can be programmed phase coherently (same phase relationship sweep to sweep) at the expense of a small increase in trace noise. The phase synchronization only has effect if both internal sources are set to Active.