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H. RX LNA Freq. Calibration
- Purpose
This item contains 15 adjustment values relative to the reference frequency for the
NV_WCDMA_LNA_RANGE_OFFSET item. These NV values should be considered as adjustments
for gain variation of the LNA gain step based on the frequency index. These values are represented by
an 8-bit signed number. The values are the change between the reference frequency LNA gain-step
and the LNA gain-step at the frequency index of interest.
- Procedure Proposal
1. Set phone in WCDMA mode.
2. Set LNA offset 1 to zero.
3. Set phone to a reference channel (a reference channel usually is in the middle of the band).
4. Set signal generator frequency to a reference channel plus an offset of 685 kHz.
5. Set Rx Power at phone antenna connector to the mid-point of LNA_RISE_1 and LNA_FALL _1
((LNA_ LNA_FALL_1)/2).
a. Load calibrated and frequency compensated DVGA for index [i]
b. Set LNA in state 0.
c. Read and store RSSI in (A[i])
d. Set LNA in state 1.
e. Read and store RSSI in (B[i])
f. Store NV_WCDMA_LNA_OFFSET_VS_FREQ[i] = (A[i]-B[i]) -
NV_WCDMA_LNA_RANGE_OFFSET
6. Repeat steps
a. through f. for all 15 frequencies and set reference frequency to a value of 0
Reference documents
QUALCOMM, MSM6200 WCDMA RF NV Items (80-V5216-3 Rev. C)
QUALCOMM, MSM6200 GSM RF NV Items (80-V5216-2 Rev. A)
QUALCOMM, MSM6250
TM
RF NV Items (80-V4690-25 Rev. C)
7. CALIBRATION
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Содержание U8210
Страница 22: ...3 TECHNICAL BRIEF 23 Figure 3 2 1 1 RTR6250 IC Functional Block Diagram ...
Страница 37: ...3 TECHNICAL BRIEF 38 Figure 3 5 12 1 Bluetooth system architecture ...
Страница 110: ...4 TROUBLE SHOOTING 111 USB_D USB_D USB_VBUS X100 48M 48MHz ...
Страница 115: ...4 TROUBLE SHOOTING 116 LCD Control data flow ...
Страница 117: ...4 TROUBLE SHOOTING 118 LCD Control data flow ...
Страница 122: ...4 TROUBLE SHOOTING 123 TR400 ...
Страница 124: ...4 TROUBLE SHOOTING 125 FLASH_ON from Main Bíd PM6650 CN1 Flash LED ...
Страница 127: ...4 TROUBLE SHOOTING 128 FB503 CN500 FB502 CN2 CN1 ...
Страница 129: ...4 TROUBLE SHOOTING 130 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Страница 131: ...4 TROUBLE SHOOTING 132 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Страница 133: ...4 TROUBLE SHOOTING 134 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Страница 135: ...4 TROUBLE SHOOTING 136 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Страница 137: ...4 TROUBLE SHOOTING 138 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Страница 139: ...4 TROUBLE SHOOTING 140 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Страница 141: ...4 TROUBLE SHOOTING 142 MIC Contact C404 C401 ...
Страница 143: ...4 TROUBLE SHOOTING 144 C115 Head_Phone Input Pin 2 3 C102 CN304 R624 ...
Страница 146: ...4 TROUBLE SHOOTING 147 Receptacle 4 6V 4 6V ...
Страница 151: ...5 BLOCK DIAGRAM 152 Top Side ...
Страница 152: ...5 BLOCK DIAGRAM 153 Bottom Side ...
Страница 154: ...6 DOWNLOAD 155 It is ready for downloading ...
Страница 160: ...6 DOWNLOAD 161 6 Click on Download to download ...
Страница 165: ...6 DOWNLOAD 166 Downloading the Module image Finally Download has been complete ...
Страница 168: ...6 DOWNLOAD 169 When you meet the NV Restore error Connect to the phone ...
Страница 170: ...6 DOWNLOAD 171 Select the proper file and click on Restore Reading the NV file and restore NV ...
Страница 200: ... 201 9 PCB LAYOUT ...
Страница 201: ... 202 9 PCB LAYOUT ...
Страница 202: ... 203 9 PCB LAYOUT U8210 KEYPAD SPEY0032001 1 1 TOP ...
Страница 203: ... 204 9 PCB LAYOUT ...
Страница 204: ... 205 9 PCB LAYOUT ...
Страница 206: ... 207 ...
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