Chapter 2, Making Measurements

Average Power

Steps

1

Connect the equipment as shown in figure 6.

 

 

 

 

 

 

2

In the main menu, enter the Base Station Channel number for the transmitter

 

 

being tested.

 

 

 

 

 

 

3

Set up the base station to transmit on the channel number entered in step 2.

 

4

From the main menu, choose Perform Average Power Measurements.

 

5

The resulting screen (see figure 7) will display average power (in Watts). The average

 

 

power displayed is corrected for the loss value entered in the Configuration

 

 

Information Menu under TX Measurement Path Loss.

 

6

You can change the measurement’s units to milliwatts or dBm using USER keys k3 and

 

 

k4, respectively.

 

 

 

 

 

 

7

USER key k1 will re-zero the power meter. It is not necessary to remove power from

 

 

the RF IN/OUT port of the PCS Interface to zero the power meter.

 

8

If you want to measure average power at another frequency, return to step 2.

 

9

Press the Main Menu (k5) key to return to the main menu.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Zero

Pow

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Watts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mW

 

 

 

 

 

 

 

 

 

 

1.28

 

 

 

 

 

 

 

 

 

 

dBm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In this example, loss through a 20 dB attenuator was added to an additional 1 dB of cable loss.

Main Menu

Figure 7

 

Notes

To minimize measurement errors due to temperature drift, occasional zeroing of

 

the power meter is recommended. An initial zeroing is performed when you enter

 

the Average Power measurement screen. It is not necessary to remove the

 

signal from the RF IN/OUT port of the PCS Interface for zeroing.

27