Cell Transmitter Path - Nokia RH-57 Series Troubleshooting Manual

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12. Ensure that all of the pins have a value of H in the State column. (Click the L
values to change them to H values.)
13. Adjust the following PDM field values on the RF PDM dialog box:
Tx IF AGC = -280
•
Tx RF AGC = -280
•
14. Ensure that the Phone Tx Pout = +25dBm and the current = 770-860mA.

Cell Transmitter Path

Table 1 indicates the test points (see Figure 8) to probe when troubleshooting the cell
transmitter path. It is recommended that you follow the steps in order. An HP high
frequency probe was used to make the frequency and output power measurements
Test
Part*
Point
T1 Z601 pin1
T2 Z601 pin 3
T3 N803 pin 8
T4 Z803T
T5 C603L
Issue 1 07/2004
Figure 7: RF PDM dialog box for Tx troubleshooting
Table 1: Cell Transmitter Test Points
Typical
Value/
Function
Frequency
HP85024A
Jedi-Out -43dBm/
836.52MHz
PA-In -25dBm/
836.52MHz
PA-Out 5.0dBm/
836.52MHz
Iso-Out 2.2dBm/
836.52MHz
IF-Out -29dBm/
228.6MHz
©2004 Nokia Corporation
Troubleshooting - RF
Typical
Value
Comments
Frequency
Prod Probe
-13.2dBm/ Output of Jedi Driver, Input to Tx
836.52MHz SAW Filter
-15.4dBm/ Output of Tx SAW, Input to PA
836.52MHz
18.3dBm/ Output of PA, Input to Isolator
836.52MHz
10.3dBm/ Output of Isolator, Input to
836.52MHz Duplexer
-24dBm/ Tx IF Probing Point at IF Filter
228.6MHz
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