Motorola APX 2000 Detailed Service Manual

3-60 Theory of Operation: Bluetooth
To verify the Bluetooth transmitter is operational, an RCMP command can be sent to transmit a
constant carrier waveform on a Bluetooth frequency. To verify the LF transmit feature is operational,
an RCMP command can be sent to transmit a constant carrier waveform at 125 kHz. There are
similar RCMP commands for verifying BT/LF RSSI when a CW BT/LF signal is applied near the
antennas of the BT/LF circuitry.
The Low-Frequency block diagram below shows the main connections:
Figure 3-46. Bluetooth Low-Frequency Circuit Block Diagram
Figure 3-47. Bluetooth Low-Frequency Pairing Data Path
LF TX
LF Coil
LF RX
ATMEL AVR32
AT32UC3A0512
SPI0_SCK
SCL
SDI
SDO
CS
WAKE
LF1P
LFN
32768 Hz
Clock
DAT
CL_DAT
XIN
Low Frequency
Receiver
AS3930
SPI0_MOSI
SPI0_MISO
NFC_CS
NFC_INT
NFC_UART_RX
NFC_UART_MAN_CLK
NFC_UART_TX
TC1_OCA
SPI
UART
125 KHz Clock
Micro-
Processor
LF Device
UART_TX_Data
+
ANTENNA COIL
32 KHz
CLK_IN
ANT_IN
UART
SPI

Motorola APX 2000 Specifications

General

Brand	Motorola
Model	APX 2000
Category	Two-Way Radio
Language	English