Tektronix NetTek YBT250, Руководство пользователя

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Taking Measurements
YBT250 Field Transmitter & Interference Tester User Manual
3- 89
Table 3--17 describes the GSM/EDGE Power vs. Time measurement
fields.
Table 3- 17: GSM/EDGE Power vs. Time fields
Field Description
BCCH The slot 0 signal source. Valid signal sources are
None, On Meas Chan/Freq, On Channel xxx, and On
Freq xx.xxx, where xxx and xx.xxx are the numeric
values for a channel or frequency, respectively. See
page 3--78 for information on setting the BCCH signal
source (frame sync mode).
Slot The specified slot to measure.
Graph The specified slot signal and the mask limits against
which the signal is compared. The graph vertical units
are the measured slot power, in dB, relative to the
computed average power. The graph horizontal units
can be either symbols or time. See page 3--90 for
information on setting the graph units.
The mask used for testing is determined by the
GSM/EDGE standard and the detected
modulation type.
Avg Power, Max
Power, and Min Power The slot average, maximum, and minimum power
values, in dBm. The Avg, Max and Min power values
are computed only for the useful part of the burst.
Detected Mod Type The actual measured signal modulation type. The
YBT250 first searches for a valid signal for the
modulation type selected in the Modulation list. If that
modulation type is not detected, the YBT250 then
searches for the other modulation type. If neither
modulation type is detected, this field shows dashes
(--------).
Mask Test The pass or fail status of the mask test. The mask
used for testing is based on the GSM standard and
the detected modulation type. Figure 3--43 shows a
failed Power vs. Time mask test.