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7. CALIBRATION
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B. TX HDET Calibration
- Purpose
This item is for building a lookup table, which indexes Tx power estimation via a scaled TX_GAIN_CTL
(representing the desired Tx power), to associated HDET circuit values at reference temperature and
the reference frequency.
- NV Items
There are three NV items stored in non-volatile (NV) memory as following
1. NV_WCDMA_EXP_HDET_VS_AGC_I
2. NV_WCDMA_HDET_OFF_I
3. NV_WCDMA_HDET_SPN_I
C. TX Freq. Comp. Calibration
- Purpose
This item contains the change in Tx power of 15 channels relative to a reference channel, for the
lowest PA gain state. These values should be considered as 8-bit signed values, stored in 1/12 dB
resolution.
- Procedure Proposal
1. Set phone in WCDMA mode.
2. Set phone to a reference channel.
3. Set the spectrum analyzer to that of the reference channel’s frequency.
4. Turn on PA.
5. Set PA to low (or high) gain state.
6. Turn on WCDMA Tx waveform.
7. Adjust TX_AGC_ADJ PDM to reach desired Tx reference power level and store it in a variable
called Tx_Reference_Power.
8. Step through all 15 frequencies and read Tx power. Remember to change the spectrum analyzer’s
frequencies accordingly.
9. Store NV_WCDMA_TX_COMP_VS_FREQ_0[i] = (Tx Power(i) - Tx_Reference_Power)
(1024/Dynamic Range)
D. TX Freq. Limit Calibration
- Purpose
The NV item NV_CDMA_TX_LIM_VS_FREQ contains a table of 16 adjustment values for the Tx
power limit, based on frequency. The Tx power limit is heavily based on the feedback from the HDET
circuit. Because the ADC readings of the HDET circuit may have some frequency dependencies, this
NV item can be used to compensate for such dependencies.
- Procedure Proposal
1. Adjust the TX_AGC_ADJ PDM and write a value to the PDM causing the phone to produce a large
output power, near or at the power level where limiting should occur.
2. Keep the PDM value constant. At reference frequency, measure the output power at the antenna (in
units of dBm). Let’s call this power level PowerRef. Also measure the HDET reading from the
appropriate ADC. Let’s call this reading HdetRef.
Summary of Contents for U8210
Page 22: ...3 TECHNICAL BRIEF 23 Figure 3 2 1 1 RTR6250 IC Functional Block Diagram ...
Page 37: ...3 TECHNICAL BRIEF 38 Figure 3 5 12 1 Bluetooth system architecture ...
Page 110: ...4 TROUBLE SHOOTING 111 USB_D USB_D USB_VBUS X100 48M 48MHz ...
Page 115: ...4 TROUBLE SHOOTING 116 LCD Control data flow ...
Page 117: ...4 TROUBLE SHOOTING 118 LCD Control data flow ...
Page 122: ...4 TROUBLE SHOOTING 123 TR400 ...
Page 124: ...4 TROUBLE SHOOTING 125 FLASH_ON from Main Bíd PM6650 CN1 Flash LED ...
Page 127: ...4 TROUBLE SHOOTING 128 FB503 CN500 FB502 CN2 CN1 ...
Page 129: ...4 TROUBLE SHOOTING 130 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 131: ...4 TROUBLE SHOOTING 132 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 133: ...4 TROUBLE SHOOTING 134 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 135: ...4 TROUBLE SHOOTING 136 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 137: ...4 TROUBLE SHOOTING 138 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 139: ...4 TROUBLE SHOOTING 140 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 141: ...4 TROUBLE SHOOTING 142 MIC Contact C404 C401 ...
Page 143: ...4 TROUBLE SHOOTING 144 C115 Head_Phone Input Pin 2 3 C102 CN304 R624 ...
Page 146: ...4 TROUBLE SHOOTING 147 Receptacle 4 6V 4 6V ...
Page 151: ...5 BLOCK DIAGRAM 152 Top Side ...
Page 152: ...5 BLOCK DIAGRAM 153 Bottom Side ...
Page 154: ...6 DOWNLOAD 155 It is ready for downloading ...
Page 160: ...6 DOWNLOAD 161 6 Click on Download to download ...
Page 165: ...6 DOWNLOAD 166 Downloading the Module image Finally Download has been complete ...
Page 168: ...6 DOWNLOAD 169 When you meet the NV Restore error Connect to the phone ...
Page 170: ...6 DOWNLOAD 171 Select the proper file and click on Restore Reading the NV file and restore NV ...
Page 200: ... 201 9 PCB LAYOUT ...
Page 201: ... 202 9 PCB LAYOUT ...
Page 202: ... 203 9 PCB LAYOUT U8210 KEYPAD SPEY0032001 1 1 TOP ...
Page 203: ... 204 9 PCB LAYOUT ...
Page 204: ... 205 9 PCB LAYOUT ...
Page 206: ... 207 ...
Page 207: ... 208 ...