Agilent Technologies Switch/Measure Manuel d'utilisateur télécharger pdf (Page 11)

Graphical view of limits/specifications

The ETSI and ANSI specifications define power limits both in terms of absolute

accuracy and relative accuracy (between power levels or ‘steps’).

The examples given in Figure 8 are for transmitters of a specific type and class.

Absolute limits depend on the type and class of the device under test.

No scale:

representation

only

Power

dBm

+43

+41

+39

+37

+35

Top level

absolute

limit is

±2 dB

Other power levels not shown

• Also ±3 dB from top measured level

• Interval between power, steps 2 dB ± 1.5 dB

Example: E-GSM900, Class 5 BTS with dynamic power control, normal conditions

Note: typical max power for a GSM BTS TRX = 43 dBm

Channels:

B, M, T. Single carrier

At least three slots on

Hopping:

Detection:

Measured over useful

part of burst (gated)

Log average

Notes: Absolutes

depend on power class

of BTS. The six or more

‘power settings’ for

radio planning are

neglected here.

Figure 8. Mean transmitted RF carrier power, BTS, limits

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 35 36

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Agilent Technologies Switch/Measure Manuel d'utilisateur Page 11