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Chapter 2, Making Measurements
Receiver Sensitivity
Steps 1 Connect the equipment as shown in figure 19.
2 In the main menu, enter the Base Station Channel number.
3 Scroll to and select Setup CDMA Generator.
4 Scroll to RF Level and enter the signal generator level for your sensitivity
measurement (in dBm).
5 Scroll to and set the Generator Mode to Data.
6 Scroll to and set the RX PN Offset, typically to 0.
7 Scroll to and set the Data Source to Random.
8 At this time, the CDMA generator is sending random data at the level you entered in
step 4.
9 You can now read the calculated FER from the PC or other means.
10 If desired, use the RF Level selection to change the signal strength and read the
resulting FER.
11 To return to the main menu, press the Main Menu (k5) key.
Figure 20
Notes The cable loss (including losses through splitters, couplers, and so forth) entered
into the Configuration Information Menu screen is taken into account
when signal generator RF level settings are made. The level at the PCS Interface
RF IN/OUT port is increased by the loss amount so the displayed RF level
indicates the true level delivered to the base station’s receiver test port(s).
The field
RX PN Offset is provided for you to change the offset for your
testing, if required. Normally, mobiles transmit on system time which
corresponds to an offset of 0 (the default value in the Software menu).