Rohde & Schwarz R&S UPP, Руководство пользователя

Страница: 215 / 938

Instrument Functions
R&S
®
UPP
199 User Manual 1411.1055.32 ─ 10
"Fix" The analog hardware is permanently set to the specified maximum
voltage. The actual output voltage is obtained by controlling the level
of the D/A converter; the analog hardware settings remain
unchanged.
Advantage:
Faster level changes and better settling characteristics. Voltage dips
when switching over the attenuator are avoided as no relays are con-
nected.
Note: If the Volt Range = Fix setting is chosen for the signal to noise
measurement, the generator level does indeed oscillate more rapidly,
but in certain cases the lowest possible noise level may not be
obtained. This restricts the dynamic range of the signal to noise mea-
surement.
Remote command:
SOURce:VOLTage:RANGe
on page 690
Max Voltage
Maximum value for the output voltage; prevents excessively high voltage values from
being entered inadvertently in the Generator Function panel.
It is not possible to configure a higher voltage in the Generator Function panel than the
one specified here.
The RMS value for sinusoidal signals is entered, i.e. the maximum peak value is higher
by a factor of .
Remote command:
SOURce:VOLTage:MAXimum
on page 690
Ref Voltage
Reference value for the relative voltage units.
If the reference level is changed, all voltage settings linked to the reference value also
change.
The relative voltage of the generator signal remains unchanged.
By varying the reference voltage, a level sweep defined with relative start and stop lev-
els, for example, can be shifted by a constant "gain factor".
Remote command:
SOURce:VOLTage:REFerence
on page 689
Ref Frequency
Reference value for the relative frequency units.
If the reference frequency is changed, all frequency settings linked to the reference
value also change.
Configuring Analog Generator