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). |
41
