Boonton 52000 Series USB CW Power Sensor Manuel d'utilisateur télécharger pdf (Page 32)

32 Using the Software

8 1

3 4

6 7 8

Data

Training

8.25

1 TDMA frame (4.615 ms)

1 timeslot (0.577 ms)

TB = Tail Bits

f = Flag

GB = Guard Band

Figure 27 GSM TDMA structure and normal burst

In some cases, when the modulation is GPRS, multiple time slots are

used. The correct duty cycle can be found by multiplying 11.6% by

the number of active time-slots.

Making a measurement

Follow this procedure:

1. Start the application.

2. zero the sensor.

Refer to “Zero your sensor” on page 26.

3. Open the measurement control panel. Select the control panel icon

or select Measurement > Control Panel.

4. Enable the duty cycle option and set the duty cycle percentage to

11.6%.

5. Select Apply.

The sensor will read the GSM phone power in the active part of the

time slot with reasonable accuracy.

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Boonton 52000 Series USB CW Power Sensor Manuel d'utilisateur Page 32