User Guide

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 48 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Table 14 gives the description and values for the test points as shown in Figure 38.
GPS RF Test Points
Use the following steps for RF testing:
1. Open the Troubleshooting menu, and click GPS Control.
The GPS Control dialog box appears.
Figure 39: GPS Control dialog box
2. Select Simple Rx Actions in the Function area.
3. Select On in the Options area, and click Execute.
4. Inject a -50 dBm tone at 1575.52 MHz into the GPS connector (X6250) with a
signal generator or call box.
5. Measure the test points with either a voltmeter or an AAS-10B probe with a
spectrum analyzer set at a center frequency of 1575.25 MHz and a span of
500hh kHz. (All points are 1575.52 MHz, except for TCXO, which is at
16.368 MHz.)
Table 14: GPS Test and DC Test Point Values
Test
Point
Description Value (V)
1 VDD_IO_GPS 1.8
2 TCXO Vcc 2.8
3LNA Vcc 1.5
4LNA_Base 0.8
5 VRF_GPS 2.8