R&S ZVB - Int. Reference; Ext. Reference

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
System Menu
Operating Manual 1145.1084.12 – 30 569
Choose a typical measurement bandwidth and one of two typical source power values. A smaller
measurement bandwidth increases the dynamic range but slows down the measurement. A
smaller source power protects the input port of the analyzer from being overdriven if an active
DUT with high gain is measured.
The predefined bandwidths and source power levels have been selected according to the
following criteria:
 The large measurement bandwidth (Fast Sweep) ensures that the noise of a S
21
trace at
minimum (–40 dBm) source power and 0 dB attenuation is smaller than 0.1 dB.
 The default source power for a passive DUT ensures that the analyzer receiver is in its
linear range (no compression) if a passive DUT with 0 dB attenuation is measured. The
default source power for an active DUT ensures no compression if an active DUT with 20
dB gain is measured. If the actual gain of the DUT is more than 30 dB, then the default
source power of –20 dB is still too high and needs to be changed after finishing the
wizard.
6. Perform a calibration (optional)
Call up the calibration wizard and perform a calibration. The calibration type is a full n-port
calibration, where n is the number of analyzer ports selected in the first stage of the calibration
wizard. This calibration can be performed as well using automatic calibration (if accessory R&S
ZV-Z5x, Calibration Unit, is available).
You can skip the automatic calibration stage (select Finish now without calibration) if
 A valid calibration is already assigned to the active channel
 You want to apply a valid calibration stored in the cal pool
 You want to perform the calibration manually, e.g. because you wish to select another
calibration type.
 You don't want to use a calibration, e.g. because the factory calibration is accurate
enough for your measurement.
In order to obtain a predictable result the measurement wizard has to reset all settings except the
current calibration data. Store your setup if you don't want to lose the current configuration.
Int. Reference
Selects the internal reference clock for synchronization. The analyzer provides a 10 MHz internal
reference clock which can be tapped off at the 10 MHz REF connector at the rear of the instrument in
order to synchronize other devices, e.g. signal generators or a second network analyzer of the ZVAB
family. See also example for reference frequency settings for external generators.
Remote control:
[SENSe<Ch>:]ROSCillator[:SOURce] INTernal
Ext. Reference
Selects an external reference clock signal for synchronization. The external 10 MHz reference clock signal
must be applied to the 10 MHz REF connector at the rear of the instrument. The external reference signal
must meet the specifications of the data sheet. The internal reference signal is synchronized to the