Rohde & Schwarz ZNL Series, User Manual

Page: 58 / 240

Configuration
R&S
®
ZNL
58 User Manual 1178.5989.02 ─ 06
Adjusting settings automatically during triggered measurements
When you select an auto adjust function a measurement is performed to determine the
optimal settings. If you select an auto adjust function for a triggered measurement, you
are asked how the R&S
ZNL should behave:
●
(default:) The measurement for adjustment waits for the next trigger
●
The measurement for adjustment is performed without waiting for a trigger.
The trigger source is temporarily set to "Free Run". After the measurement is com-
pleted, the original trigger source is restored. The trigger level is adjusted as fol-
lows:
–
For IF Power and RF Power triggers:
Trigger Level = Reference Level - 15 dB
– For Video trigger:
Trigger Level = 85 %
Remote command:
[SENSe:]ADJust:CONFigure:TRIGger
on page 142
Adjusting all Determinable Settings Automatically ( Auto All ) ...................................... 58
Adjusting the Center Frequency Automatically ( Auto Frequency ) .............................. 58
Setting the Reference Level Automatically ( Auto Level ) ............................................. 58
Resetting the Automatic Measurement Time ( MeastimeAuto ) ....................................59
Changing the Automatic Measurement Time ( MeastimeManual ) ............................... 59
Upper Level Hysteresis ................................................................................................ 59
Lower Level Hysteresis ................................................................................................ 59
Adjusting all Determinable Settings Automatically ( Auto All )
Activates all automatic adjustment functions for the current measurement settings.
This includes:
●
Auto Frequency
●
Auto Level
Remote command:
[SENSe:]ADJust:ALL
on page 140
Adjusting the Center Frequency Automatically ( Auto Frequency )
The R&S ZNL adjusts the center frequency automatically.
The optimum center frequency is the frequency with the highest S/N ratio in the fre-
quency span. As this function uses the signal counter, it is intended for use with sinus-
oidal signals.
Remote command:
[SENSe:]ADJust:FREQuency
on page 142
Setting the Reference Level Automatically ( Auto Level )
Automatically determines a reference level which ensures that no overload occurs at
the R&S
ZNL for the current input data. At the same time, the internal attenuators are
adjusted so the signal-to-noise ratio is optimized, while signal compression and clip-
ping are minimized.
Adjusting Settings Automatically