Technical data

SYSTem Subsystem 12

N1911A/1912A P-Series Power Meters Programming Guide 577

NADC

The NADC set- up provides:

• Average power measurement of both active timeslots in NADC or

IS- 136 “full rate” transmission. This assumes that there are two

timeslots to be measured in each frame as for example with timeslots 0

in the following diagram:

Figure 12-22A Trace Display Of The Active Timeslots

• A trace display of the active timeslots.

The measurement is started by detecting the RF burst—for example the

burst emitted by a mobile—using the internal RF level trigger. The internal

level trigger is set to –20 dBm. Time- gating is used to measure the average

power in two active timeslots which are separated by two inactive

timeslots

The following table shows the power meter presets when <character_data>

is set to NADC. Commands not listed are preset according to their DEFault

values (for further information refer to Table 12- 26):

Tab le 12 - 66 NADC: Power Meter Presets

0120

IS-136 full rate frame

Command Setting Comments

Frequency

[SENS[1]]|SENS2:FREQ[:CW|:FIX] +800.000 MHz Frequency setting

Sensor measurement mode

[SENS[1]]|SENS2:DET:FUNC NORM Measurement mode

Sensor video bandwidth setup