Theory of Operation
: Bluetooth
3-51
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 3-40. Bluetooth Low-Frequency Circuit Block Diagram
Figure 3-41. 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
Summary of Contents for Astro APX 3000
Page 1: ...APXTM TWO WAY RADIOS APX 3000 DETAILED SERVICE MANUAL ...
Page 2: ......
Page 4: ...Notes ...
Page 6: ...vi Document History Notes ...
Page 10: ...x Table of Contents Notes ...
Page 12: ...xii List of Tables Notes ...
Page 18: ...xviii List of Figures Notes ...
Page 22: ...xxii CommercialWarranty Notes ...
Page 46: ...3 20 Theory of Operation Main Board Notes ...
Page 84: ...3 58 Theory of Operation Bluetooth Notes ...
Page 208: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 222: ...7 14 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 282: ...8 60 Schematics Boards Overlays and Parts Lists Main Board Block UHF1 84012513001_A Notes ...
Page 390: ...8 168 Schematics Boards Overlays and Parts Lists Main Board Block VHF 84012512001_A Notes ...
Page 456: ...9 8 Debugging Fixture Powering up Covert Board Notes ...
Page 468: ...Glossary 10 Glossary Notes ...
Page 472: ...Index 4 Index Notes ...
Page 473: ......