Test Procedures R&S SMB
1407.0806.82 1.10 E-5
Measurement
Settings on analyzer: - Set the analyzer to the stop frequency
Set the DUT to the start frequency f
start
Send the stop frequency f
stop
from the controller to the DUT.
The externally triggered analyzer displays the settling curve. The
setting time is defined as the time from which on the frequency
deviation from the stop frequency is less than the specified
deviation in the data sheet.
Repeat the measurement with ALC state Off:
RFAutomatic Level ControlStateOFF (Sample & Hold)
Measurements in List mode
Connect a trigger source (digital voltage levels: U1 < 0.8 V and U2
> 2 V) to the INSTR TRIG connector of DUT and analyzer. The
pulse generator can be used as trigger source for example.
Settings on DUT:
- In the List mode menu, generate a list containing the two test
frequencies f
start
and f
stop
with a level of 0 dBm each.
- Set operating mode to External Step.
Settings on spectrum analyzer:
– Set DEMOD BW to 200 kHz
– Set MEAS TIME to 2 ms
Toggle the output voltage of the trigger source.
(Settings on pulse generator: single shot)
With each rising edge from the trigger source the frequency
toggles between f
start
and f
stop
.
The externally triggered analyzer displays the settling curve.
The setting time is defined as the time when the frequency
deviation from the stop frequency is less than the specified
deviation in the data sheet.
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