R&S
®
ZVA/ZVB/ZVT System Menu
1145.1084.12 4.259 E-6
Add/Modify External Generator
S
elects and configures an external generator.
The following control elements select the generator type and its connection:
• Name is an optional, arbitrary name associated with the generator. Names appear in the
generator lists in the External Generators tab and in the selection dialogs for source signals
(measurements and power calibration). If no name is specified, the generators are listed as
Gen 1, Gen 2...
• Interface selects an interface type for the connection. In addition to the GPIB0 and VXI-11
interfaces (for devices connected to the IEC Bus or LAN1/2 connectors on the rear panel of the
analyzer, respectively), the analyzer supports any Other interface supported by the installed
VISA library.
• GPIB Address or Hostname or IP Address (depending on the Interface selection) contains the
address for the current interface type. GPIB addresses must be unique for all devices
connected to the GPIB bus (range: 0 to 30), IP addresses must be compatible with the entries
in the VISA library. For an Other interface type, the input field contains the Resource String
from the installed VISA library.
• Driver contains a list of all supported generator driver types. The names in the list are identical
with the name of the generator driver files (*.gen) stored in the resources\extdev subdirectory of
the analyzer's program directory.
• Identify Type sends an identification query (IDN?) to the specified device address in order to
identify the generator type and select an appropriate driver file. An error message is displayed if
the identification fails.
The following control elements provide hardware-related settings:
• Fast Sweep enables or disables the fast sweep mode for external generators that support a
frequency and level list mode.
• 10 MHz Ref switches the analyzer to either internal or external frequency reference.
Fast sweep mode and conditions
In the list mode the external generator steps through a predefined list of frequencies or signal powers.
This mode can be used to accelerate the measurements involving external power meters.
If Fast Sweep is activated, the analyzer compiles a list of the stimulus values (frequencies and powers)
in all channels and transfers it to the generator. The list is automatically updated and re-transferred
whenever the channel settings are changed.
The analyzer uses a trigger handshake mechanism in order to control the generator's list mode:
• The generator sends an EXT GEN BLANK signal to pin no. 22 of the USER CONTROL
connector on the rear panel of the analyzer to show that it is ready to step to the next frequency
or power value in the list.
• The analyzer transmits an EXT GEN TRG signal at pin no. 21 of the USER CONTROL
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