LTE PRACH Measurement
R&S
®
CMW-KM5xx/-KS5xx
770
User Manual 1173.9628.02 ─ 16
This setting has no influence on "Free Run" measurements.
Remote command:
Min Trigger Gap
Defines a minimum duration of the power-down periods (gaps) between two triggered
power pulses. This setting is valid for an "(IF) Power" trigger source.
The trigger system is controlled by means of a timer which is reset to zero in the follow-
ing instances:
●
At the IF power-down ramp of each triggered or untriggered pulse, even though the
previous counter may not have elapsed yet. A power-down ramp is detected when
the signal power falls below the trigger threshold.
●
At the beginning of each measurement: The minimum gap defines the minimum
time between the start of the measurement and the first trigger event.
The trigger system is re-armed as soon as the timer has reached the specified mini-
mum gap.
This parameter can be used to prevent unwanted trigger events due to fast power var-
iations within a preamble. The default value is usually big enough to ensure that the
measurement is not re-triggered within a preamble and small enough to ensure that
the trigger system is re-armed before the next preamble starts.
Remote command:
4.3.2.6
Limit Settings
The "Limits" in the "LTE PRACH Configuration" dialog define upper limits for the modu-
lation and power results.
For details see
chapter 4.2.8, "Limit Settings and Conformance Requirements"
Fig. 4-19: Limit settings
GUI Reference
深圳德标仪器
135-1095-0799
