Mobile Communications Lab II
Experiment-1&2
Name : Zahraa ahmed amer
2st semester / 4th grade
University of Information Technology and
Communications College of Engineering, Dept. of Mobile
Communications and Computing Engineering
2023-2024
Experiment:1
battery voltage & battery charging
1-Theory-
The electrical specifications for the battery connector are shown in Table.
It consists of three terminals.
1. Battery +Ve.
2. BSI.
3. Ground.
Pin 1: Battery Voltage (VBATT): This is the supply Pin of the battery; it
supplies power to the system and also acts as a charging terminal.
Pin 2: Battery Size Indicator (BSI): The battery status/size is indicated
by a resistor inside the battery pack.
Pin 3: Ground (GND): This pin is directly connected to ground.
2-Requairments-
1.4G LTE Smart Phone TechBook
2. SIM card(s) of any 4G service provider supporting 4G LTE frequency
band
3. Power Supply for Scientech 2139 with Mains Cord
4. Hands free kit.
3-Operating mode-
4G Mobile Phone training system works in two operating mode that can
be selected by a Mode Selection Switch provided on the TechBook at
left side near Power connector.
Battery Mode (Switch Released): In this mode the TechBook operates
with battery supplied & battery can be charged.
Adaptor Mode (Switch Pressed): In this mode the TechBook operates
on external Power Supply. For this connect Scientech 2139 Power
supply with mains cord to TechBook.
4-Operating Condition-
1. Follow all the conditions as instructed in Experiment 1.
2. Check that all the Switch Faults should be in off position.
5-Procedure-
1. Once the TechBook is initially ready as per the set up given in
Experiment I and if it detects the 4G service provider network(s)
with sufficient network strength, further experiment can be done
with this TechBook as follows.
2. Observe the different voltages used for various sections as per the
table given below.
Discussion
# name pins Adabter mode
Battery is not
1 VBATT pin 13 5.03,5.05
efficient
Battery is not
2 SBI pin 14 0.02,0.25
efficient
GND is always
3 GND pin 15 0.00
0
5-disscuion-
Li-ion battery has a higher cut-off voltage of around 3.2 V. I
ts nominal voltage is between 3.6 to 3.8 V; its maximum charging voltage
can go to 4– 4.2 V max. The Li‑ion can be discharged to 3V and lower; however, with a
discharge to 3.3V (at room temperature), about 92–98% of
the capacity is used. Importantly, particularly in the case of
lithium-ion batteries used in the vast majority of portable electronics today, a
voltage cut-off below 3.2V can lead to chemical
instability in the cell, resulting in a reduced battery lifetime.
6-result-
Experiment: 2
Power management unit
1-Theory:
Power supply management unit supplies the power to all the section of the
mobile phone. There are following Power Supply sections.
RF Power Supply: This supply is used in Transmitting/ Receiving section of
the mobile phone.
Logic Power Supply: This Power Supply section provides the Power Supply for
RTC, Alert VCC supply, Audio processor Power Supply, CPU section, Memory
section, SIM switcher section, User Interface section, LCD display, Keypad
LED indication etc.
On/Off circuit: This circuit is made up of series of transistors and diodes, when
on/off button is pushed, the battery supply is connected to this circuit and
disconnects when on/off button is released.
2-Requairments-
1.4G LTE Smart Phone TechBook
2. SIM card(s) of any 4G service provider supporting 4G LTE frequency
band
3. Power Supply for Scientech 2139 with Mains Cord
4. Hands free kit.
3-Operating mode-
4G Mobile Phone training system works in two operating mode that can
be selected by a Mode Selection Switch provided on the TechBook at
left side near Power connector.
Battery Mode (Switch Released): In this mode the TechBook operates
with battery supplied & battery can be charged.
Adaptor Mode (Switch Pressed): In this mode the TechBook operates
on external Power Supply. For this connect Scientech 2139 Power
supply with mains cord to TechBook.
4-Operating Condition-
1. Follow all the conditions as instructed in Experiment 1.
2. Check that all the Switch Faults should be in off position.
5-Procedure-
1. Once the TechBook is initially ready as per the set up given in
Experiment I and if it detects the 4G service provider network(s)
with sufficient network strength, further experiment can be done
with this TechBook as follows.
2. Observe the different voltages used for various sections as per the
table given below.
6-Disscuion-
The power management unit in mobile phone can be divided into two
sections; the power distribution and switching unit, and the charging
unit. Power distribution section is used for the distribution of voltage
and current to the other components of the smartphone. It takes power
from the battery and converts it to various voltages such as 4.8 V, 2.8
V, 1.8 V and 1.6 V, and distributes it to other components. Charging
section is responsible for charging the battery of the mobile phone.
7-result-
Name Measured parameter
VCC 4.94
VRF 2.90
VDDIO 1.57
VDDINT 2.82
VCPU 1.18
Mobile Communications Lab II
Experiment-3
Name : Zahraa ahmed amer
2st semester / 4th grade
University of Information Technology and
Communications College of Engineering, Dept. of Mobile
Communications and Computing Engineering
2023-2024
Experiment:3: part1
1-Objective:
study and analysis the buzzer in 4G LTE smart phone teckbook
2-Requairments-
1. 4G LTE Smart Phone TechBook
2. SIM card(s)
3. Power Supply for Scientech 2139 with Mains Cord
4. Hands free kit.
5. Oscilloscope
3-Operating mode-
4G Mobile Phone training system works in two operating mode that can
be selected by a Mode Selection Switch provided on the TechBook at
left side near Power connector.
Adaptor Mode (Switch Pressed): In this mode the TechBook operates
on external Power Supply. For this connect Scientech 2139 Power
supply with mains cord to TechBook.
4-Operating Condition-
1. Follow all the conditions as instructed in Experiment 1.
2. Check that all the Switch Faults should be in off position.
5-Procedure-
1- press menu button
2- use scroll keys until you get key option
3- select sound profile using up down keys
4- select normal and press edit then select call alert type and press
change then select melody mode and save
5- go back and select voice call ring tone —> press change —> select
any tone
6- go back select volume and check the volume of call alert —> save it
and go back to enational window
7- make call to a techbook you will observe that the buzzer
6-result-
Part2 / vaibrator
Experiment:3: part1
1-Objective:
study and analysis the buzzer in 4G LTE smart phone teckbook
2-Requairments-
1. 4G LTE Smart Phone TechBook
2. SIM card(s)
3. Power Supply for Scientech 2139 with Mains Cord
4. Hands free kit.
5. Oscilloscope
3-Operating mode-
4G Mobile Phone training system works in two operating mode that can
be selected by a Mode Selection Switch provided on the TechBook at
left side near Power connector.
Adaptor Mode (Switch Pressed): In this mode the TechBook operates
on external Power Supply. For this connect Scientech 2139 Power
supply with mains cord to TechBook.
4-Operating Condition-
1. Follow all the conditions as instructed in Experiment 1.
2. Check that all the Switch Faults should be in off position.
5-Procedure-
1- press menu button
2- use scroll keys until you get key option
3- select sound profile using up down keys
4- select normal and press edit then select call alert type and press change then select
vibration mode and save
5- go back to enational window
6- make call to a techbook you will observe that the buzzer
6-result-
7-Discussion:
The role of the UI is to display the application data on the screen and also to
serve as the primary point of user interaction. Whenever the data changes, either
due to user interaction (like pressing a button) or external input (like a network
response), the UI should update to reflect those changes.
Mobile Communications Lab II
Experiment-5
Name : Zahraa ahmed amer
2st semester / 4th grade
University of Information Technology and
Communications College of Engineering, Dept. of Mobile
Communications and Computing Engineering
2023-2024
Experiment:5/mic and speaker
1-Objective:
Study and analyse mic and speaker section
2-Requairments-
1-4g lte smartphone tiehbook
2-SIM card s of any 4g serveice provider supporting 4g lte frequency band
3-Power Supply for sinteck 2139 4 hands free kit
4-Oscilloscope
5-Hands free kit
3-Operating mode-
4G Mobile Phone training system works in two operating mode that can be
selected by a Mode Selection Switch provided on the TechBook at left side near
Power connector.
Adaptor Mode (Switch Pressed): In this mode the TechBook operates on
external Power Supply. For this connect Scientech 2139 Power supply with
mains cord to TechBook.
4-Operating Condition-
1. Follow all the conditions as instructed in Experiment 1.
2. Check that all the Switch Faults should be in off position.
5-Procedure-
1- when the techbook is initially ready and if it detects the 4g services provider
network with sufficient network strength the exprement can be done
2- make a call to the techbook and receive a call now the volume of the speaker can
be increased or decreased using up down key .
3-Set the volume level to a maximum
4-observe the received oudio signal from caller at the speaker test point in user
interface section
5- observe transmittied oudio signal at the mic test point in user interface section
6-result-
transmitter :
Reciver :
