Ronde & Schwarz 1304.0004K03, Руководство пользователя

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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
347 User Manual 1178.3370.02 ─ 11
Adjusting all Determinable Settings Automatically (Auto All) ...................................... 347
Adjusting the Center Frequency Automatically (Auto Frequency) .............................. 347
Setting the Reference Level Automatically (Auto Level) ............................................. 347
Resetting the Automatic Measurement Time (Meastime Auto) ...................................348
Changing the Automatic Measurement Time (Meastime Manual) .............................. 348
Upper Level Hysteresis ............................................................................................... 348
Lower Level Hysteresis ............................................................................................... 348
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 753
Adjusting the Center Frequency Automatically (Auto Frequency)
The R&S FPL1000 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.
The auto frequency function is not available if the tracking generator is active (see
"Tracking Generator Settings" on page 294).
This function is not available during signal tracking (see Chapter 6.4.3, "Keeping the
Center Frequency Stable - Signal Tracking" , on page 308).
To set the optimal reference level, see "Setting the Reference Level Automatically
(Auto Level)" on page 315).
Remote command:
[SENSe:]ADJust:FREQuency
on page 756
Setting the Reference Level Automatically (Auto Level)
Automatically determines a reference level which ensures that no overload occurs at
the R&S
FPL1000 for the current input data. At the same time, the internal attenuators
are adjusted. As a result, the signal-to-noise ratio is optimized, while signal compres-
sion and clipping are minimized.
To determine the required reference level, a level measurement is performed on the
R&S
FPL1000.
If necessary, you can optimize the reference level further. Decrease the attenuation
level manually to the lowest possible value before an overload occurs, then decrease
the reference level in the same way.
You can change the measurement time for the level measurement if necessary (see
"Changing the Automatic Measurement Time (Meastime Manual)" on page 348).
Remote command:
[SENSe:]ADJust:LEVel
on page 756
Adjusting Settings Automatically