HDD interface

The HDD interface is fully compliant with the Secure Digital Input Output (SDIO) system specification. The HDD is not a removable device. It is connected to the MMC SDIO2 (1.8 V) interface of the application processor engine (APE). Since the SDIO interface is a 3.0 V interface, voltage level shifters are used to match the signals between the HDD and APE. The HDD interface is shown in the following illustration The HDD is placed in a metal shield. It has four conductive gaskets, and the PWB has...

GSM transmitter tunings Tx IQ tuning GSM Context

The Tx path branches to I and Q signals at the RF I Q modulator. Modulator and analog hardware located after the modulator cause unequal amplitude and phase disturbance to I and Q signal paths. Tx IQ tuning balances the I and Q branches. Tx IQ tuning must be performed on all GSM bands. Steps 1. Start Phoenix service software. 3. From the Operating mode drop-down menu, set mode to Local. 4. Choose Tuning GSM Tx IQ Tuning. 5. From the Band drop-down menu, choose GSM900. 6. In the Tx IQ Tuning...

General instructions for WLAN Rx troubleshooting Steps

Connect MJ-78 with a control unit to a computer with a DAU-9S cable. Alternatively, if you are using FPS-8, use an XCS-4 modular cable and a USB cable. Note Make sure that you have a PKD-1 dongle connected to the computer parallel port. 2. Connect a DC power supply to the module test jig with a power cable. Note Turn off the DC power supply at this stage. When repairing or tuning the receiver, use an external DC supply with at least 3 A current capability. Set the DC supply voltage to 12 V, and...

WCDMA receiver tunings Rx AGC alignment Wcdma Context

Rx AGC alignment tuning is used to find out the real gain values of the WCDMA Rx AGC system and converters. Steps 1. Connect the GSM connector of the module jig to a signal generator. 2. From the Operating mode drop-down menu, set mode to Local. 3. Choose Tuning WCDMA Rx AGC Alignment. Middle 10700 j 2140.0 MHz Low 110562 rj 2112.4 MHz High 110838 2167.6 MHz Middle 10700 j 2140.0 MHz Low 110562 rj 2112.4 MHz High 110838 2167.6 MHz

Introduction to transmitter functionality

Transmitter functions are implemented in an RF ASIC. The ASIC contains a BB frequency low pass filter, which is tunable according to the signal bandwidth of the system in use. In addition, the ASIC contains separate RF paths comprising a final frequency IQ modulator and VGA amplifiers. WCDMA transmitter functionality In the transmitter side, an analogue I Q modulated signal is received from digital baseband into an RF ASIC and fed through a low pass filter. After the filter the signal is fed to...

Display module mechanical concept

Figure 90 General diagram of the LCD module Figure 90 General diagram of the LCD module Partial display function Power saving by pausing display process on part of the screen. Built-in RAM capacity 176 rows x 208 lines x 18 bits 658,944 bits The display has two different operating modes 1 Normal mode, Full screen, 260k colours 2 Partial idle mode, 8 colours and only part of the display is active The module includes FPWB foil including connector and discretes and driver circuits drivers...