User's Manual

ManualsBrandsPeiker acustic ManualsElectronicsGSM/GPRS/UMTS/HSDPA/HSUPA Module with GPS and GLONASS

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3.3.3.3. Antenna diagnostics

The diagnostic is supported for the main and backup antenna. The following states have to diagnose:

a) Antenna connected

b) No antenna connected

c) Antenna has a short-circuit against ground

d) Antenna has a short-cicuit against +Ubatt

The hardware is implemented for the diagnostic for both antenna on the PCB of the NAD6200 – module.

This hardware is connected to the PM8028. Main antenna is connected to MPP_08 and backup antenna

is connected to MPP_07.

The following expected voltage level is see at the ADC input with an external resistor R = 10 kOhm:

(ADCref = 2.2 V)

For a) about 850 mV

For b) about 1150 mV

For c) about 390 mV

For d) about 1900 mV

3.3.4. Chipset MDM6200 + PM8028

The NAD Module included a Chipset from Qualcomm. This Chipset consist of the power manager

PM8028 and mobile data modem MDM6200.

3.3.4.1. PM8028

The PMIC monitors and controls the power sources, detecting which sources are applied and verifying

that they are within acceptable operational limits. Thermal conditions of the integrated pass transistor

and its total current are monitored and reported to a state machine that coordinates PM operations.

Other input power management circuits provide VDD or VBAT voltage regulation, current monitoring and

over – current protection, VDD collapse protection, under – voltage lockout protection, and automated

recovery from sudden momentary power loss (SMPL).

On – chip voltage regulators generate 24 programmable output voltages using a combination of four

switched – mode power supplies, 19 low – dropout linear regulators.

3.3.4.2. MDM6200

The MDM6200 is a mobile data modem IC. They have the following functions:

Baseband functions:

Processors

Memory support

Connectivity

Air interfaces

Internal BB functions

Interfaces with other functions