Table 12-14 W-Cdma: Power Meter Presets - Keysight N1911A Programming Manual

12 SYSTem Subsystem
W-CDMA
The W-CDMA set-up provides:
– Average power in a W-CDMA signal (bandwidth <=5 MHz)
– Peak power and peak-to-average ratio of the signal over a defined, statistically
The measurement is a continuously gated measurement on a 3GPP W-CDMA
signal. Its aim is to measure the peak and average power corresponding to a
<0.01 % probability that there are no peaks above the returned peak reading. Time
gating is set to 10 ms, corresponding to 200000 samples. Triggering is set to
occur continuously internally to the meter. The internal trigger is set to AutoLevel.
A reading over the 10 ms period is returned then re-initiated for the next 10 ms
period. In this way the reading always relates to a position beyond 0.01 % on the
CCDF curve and will refresh to track any signal or DUT changes.
The following table shows the power meter presets when <character_data> is set
to WCDMA. Commands not listed are preset according to their DEFault values (for
further information refer to
Table 12-14 W-CDMA: Power Meter Presets
Command
Frequency
[SENS[1]]|SENS2:FREQ[:CW|:FIX]
Sensor measurement mode
[SENS[1]]|SENS2:DET:FUNC
Sensor video bandwidth setup
[SENS[1]]|SENS2:BAND|BWID:VID
Gate Setup
[SENS[1]]|SENS2:SWE[1]|2|3|4
:OFF:TIME
[SENS[1]]|SENS2:SWE[1]|2|3|4
:TIME
550
valid number of samples. The reading is continuously refreshed. This indicates
how W-CDMA channel loading affects peak power and power distribution.
N1911A/1912A P-Series Power Meters Programming Guide
Table 12-1):
Setting
+1900.000 MHz
NORM
E9321A/25A: DEF
E9322A/26A: DEF
E9323A/27A: OFF
N1921/2A: OFF
Gate 1: 0 s
Gates 2 - 4: 0
Gate 1: 10 ms
Gates 2 - 4: 0
Comments
Frequency setting
Measurement mode
Sensor video bandwidth
Delay between trigger point and time
gated period.
Length of time gated period for time gated
measurements.