Tracking Generator
R&S
®
ESR
481
User Manual 1175.7068.02 ─ 12
Remote command:
Source Config
Opens the "Tracking Generator Configuration" dialog, see
8.2
Connecting External Tracking Generators
The external tracking generator is controlled either via a LAN connection or via the –
optional – second GPIB interface of the R&S
ESR (= IEC2, supplied with the option).
Using GPIB, with some Rohde & Schwarz generators, additionally the TTL synchroni-
zation interface included in the AUX interface of the R&S
ESR can be used.
Using the TTL interface allows for considerably higher measurement rates than pure
GPIB control, because the frequency stepping of the R&S
ESR is directly coupled with
the frequency stepping of the generator.
Therefore, the frequency sweep differs according to the capabilities of the employed
generator:
●
For generators without a TTL interface, the generator frequency is set for each fre-
quency point via GPIB first, then the setting procedure has to be completed before
recording of measured values is possible.
●
For generators with a TTL interface, a list of the frequencies to be set is entered
into the generator before the beginning of the first sweep. Then the sweep is star-
ted and the next frequency point is selected using the TTL handshake line TRIG-
GER. Recording measured values is only enabled when the generator signals the
end of the setting procedure via the BLANK signal. This method is considerably
faster than pure GPIB control.
The "Tracking Generator Configuration" dialog provides a list of the supported genera-
tors with the frequency and level range, as well as the capabilities used. The interface
settings are defined using the
on page 481 softkey. For details see
Chapter 8.3.2, "External Tracking Generator"
In order to use the functions of the external tracking generator, an appropriate genera-
tor must be connected and configured correctly. If no external generator is selected, if
the GPIB or TCP/IP address is not correct, or the generator is not ready for operation,
an error message is displayed ("Ext. Generator GPIB Handshake Error!" or "Ext. Gen-
erator TCPIP Handshake Error!".
illustrates the TTL connection using an SMU generator, for example.
Connecting External Tracking Generators
