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6816985H01-B
August 16, 2007
UHF1 Detailed Theories of Operation:
VOCON Functional Blocks
4.2-11
4.2.6.2.1.3 Audio Circuitry
A16-bit CODEC is integrated into the MAKO IC and programmable by the dual-core processor
through the SPI bus. The CODEC converts microphone audio data into a digital bit stream for
processor by the DSP and converts receive audio data that was processed by the DSP into an
analog audio signal for amplification to a speaker. The CODEC interfaces to the DSP through the
4-wire SAP bus. The CODEC clock, which is 512kHz, is generated by the MAKO IC and supplied on
the VC_DCLK pin (R772). The CODEC 8 kHz frame synchronization signal is generated by the
MAKO IC and supplied on the VC_FSYNC pin (R773). The CODEC transmit data signal is on the
VC_TX3V pin and the CODEC receive data signal is on the VC_RX pin. For the MAKO IC to
generate the clock and frame sync signals, a 24.576 MHz crystal Y702 is supplied to the XOUT and
XIN pins.
The MAKO IC contains internal amplification (digital and analog), filtering, and multiplexing
functionality for both receive and transmit audio. These functions are programmable by the dual core
processor through the SPI bus. The input for the internal microphone audio (C755) is the
INT_MIC_P pin, while the input for the external microphone audio (C754) is the EXT_MIC_P pin.
The differential output for the internal speaker is the INT_SPKR_P pin and INT_SPKR_M pin. The
differential output for the external speaker is the EXT_SPKR_P pin (C769) and EXT_SPKR_M pin
(C768).
4.2.6.2.2 Regulator
The 5 V regulator is internal to the MAKO IC and uses SW_B+ as its input voltage at pin V08_I
(C720). The 5 V supply (L705) is used by the bi-directional voltage translators integrated into the
MAKO IC, the MAKO IC protection diodes, and the ESD protection circuitry.
The 1.55 V regulator (programmable through the SPI bus) is integrated into the MAKO IC. This
regulator uses VSW2 to source the current. The 1.55 V supply (R718) is used by the dual-core
processor U701 for it core voltage and clock amplifier.
4.2.6.2.3 Audio Pre-Amplifier
The audio pre-amplifier is integrated into the MAKO IC. The pre-amplifier's supply voltage and gain
are programmable and controlled by the dual-core processor through the SPI bus. The input to the
pre-amplifier is routed from the internal gain stages within the MAKO IC. The differential output of the
pre-amplifier is the VC_OUT_P pin (R844) and VC_OUT_M pin (R798).
4.2.6.2.4 Audio Power Amplifier
The audio power amplifier, supplied by SW_B+, is integrated into the MAKO IC U701. The audio PA
is a programmable BTL type and is controlled by the dual-core processor through the SPI bus. The
operational state of the PA, as well as selecting between the internal and external audio path, is
controlled by the dual-core processor via the SPI bus.
The differential input to the audio PA comes from a low-pass filter (R844, R798, C764, C765, and
C790) at the output of the audio pre-amplifier.
Содержание ASTRO MT 1500
Страница 4: ...iv Table of Contents August 16 2007 6816985H01 B Notes ...
Страница 30: ...August 16 2007 6816985H01 B 2 1 4 VHF Overall Characteristics Vocoder Circuitry Overview Notes ...
Страница 34: ...August 16 2007 6816985H01 B 2 2 4 UHF1 Overall Characteristics Vocoder Circuitry Overview Notes ...
Страница 38: ...August 16 2007 6816985H01 B 2 3 4 UHF2 Overall Characteristics Vocoder Circuitry Overview Notes ...
Страница 42: ...August 16 2007 6816985H01 B 2 4 4 700 800 MHz Overall Characteristics Vocoder Circuitry Overview Notes ...
Страница 46: ...August 16 2007 6816985H01 B 2 5 4 900MHz Overall Characteristics Vocoder Circuitry Overview Notes ...
Страница 140: ...August 16 2007 6816985H01 B 4 4 20 700 800 MHz Detailed Theories of Operation VOCON Functional Blocks Notes ...
Страница 164: ...August 16 2007 6816985H01 B 5 6 Troubleshooting Procedures Operational Error Codes Notes ...
Страница 188: ...August 16 2007 6816985H01 B 6 1 24 VHF Troubleshooting Charts Secure Hardware Failure Notes ...
Страница 212: ...August 16 2007 6816985H01 B 6 2 24 UHF1 Troubleshooting Charts Secure Hardware Failure Notes ...
Страница 236: ...August 16 2007 6816985H01 B 6 3 24 UHF2 Troubleshooting Charts Secure Hardware Failure Notes ...
Страница 260: ...August 16 2007 6816985H01 B 6 4 24 700 800 MHz Troubleshooting Charts Secure Hardware Failure Notes ...
Страница 284: ...August 16 2007 6816985H01 B 6 5 24 900 MHz Troubleshooting Charts Secure Hardware Failure Notes ...
Страница 296: ...August 16 2007 6816985H01 B 7 1 12 VHF Troubleshooting Waveforms PP7 TX LO 7 1 11PP7 TX LO Probe point TP299 ...
Страница 301: ...6816985H01 B August 16 2007 VHF Troubleshooting Waveforms TP13 Mod In 7 1 17 7 1 16TP13 Mod In Test point TP36 ...
Страница 324: ...August 16 2007 6816985H01 B 7 1 40 VHF Troubleshooting Waveforms PP33 SPI Data 7 1 39PP33 SPI Data Probe Point R802 ...
Страница 325: ...6816985H01 B August 16 2007 VHF Troubleshooting Waveforms PP34 SPI CLK 7 1 41 7 1 40PP34 SPI CLK Probe Point R803 ...
Страница 342: ...August 16 2007 6816985H01 B 7 2 12 UHF1 Troubleshooting Waveforms PP7 TX LO 7 2 11PP7 TX LO Probe point TP299 ...
Страница 347: ...6816985H01 B August 16 2007 UHF1 Troubleshooting Waveforms TP13 Mod In 7 2 17 7 2 16TP13 Mod In Test point TP36 ...
Страница 371: ...6816985H01 B August 16 2007 UHF1 Troubleshooting Waveforms PP33 SPI Data 7 2 41 7 2 39PP33 SPI Data Probe Point R802 ...
Страница 372: ...August 16 2007 6816985H01 B 7 2 42 UHF1 Troubleshooting Waveforms PP34 SPI CLK 7 2 40PP34 SPI CLK Probe Point R803 ...
Страница 378: ...August 16 2007 6816985H01 B 7 2 48 UHF1 Troubleshooting Waveforms TP39 RX SSI Frame Sync Notes ...
Страница 390: ...August 16 2007 6816985H01 B 7 3 12 UHF2 Troubleshooting Waveforms PP7 TX LO 7 3 11PP7 TX LO Probe point TP299 ...
Страница 395: ...6816985H01 B August 16 2007 UHF2 Troubleshooting Waveforms TP13 Mod In 7 3 17 7 3 16TP13 Mod In Test point TP36 ...
Страница 418: ...August 16 2007 6816985H01 B 7 3 40 UHF2 Troubleshooting Waveforms PP33 SPI Data 7 3 39PP33 SPI Data Probe Point R802 ...
Страница 419: ...6816985H01 B August 16 2007 UHF2 Troubleshooting Waveforms PP34 SPI CLK 7 3 41 7 3 40PP34 SPI CLK Probe Point R803 ...
Страница 486: ...August 16 2007 6816985H01 B 7 5 12 Troubleshooting Waveforms PP7 TX LO 7 5 11PP7 TX LO Probe point Shield Tx_INJ ...
Страница 492: ...August 16 2007 6816985H01 B 7 5 18 Troubleshooting Waveforms TP13 Mod In 7 5 17TP13 Mod In Test point TP203 ...
Страница 501: ...6816985H01 B August 16 2007 Troubleshooting Waveforms PP22 Analog 5V 7 5 27 7 5 26PP22 Analog 5V Probe point U500 pin 5 ...
Страница 517: ...6816985H01 B August 16 2007 Troubleshooting Waveforms PP33 SPI Data 7 5 43 7 5 42PP33 SPI Data Probe Point R802 ...
Страница 518: ...August 16 2007 6816985H01 B 7 5 44 Troubleshooting Waveforms PP34 SPI CLK 7 5 43PP34 SPI CLK Probe Point R803 ...
Страница 521: ...6816985H01 B August 16 2007 Troubleshooting Waveforms TP37 RX SSI Data 7 5 47 7 5 46TP37 RX SSI Data Test Point TP403 ...
Страница 522: ...August 16 2007 6816985H01 B 7 5 48 Troubleshooting Waveforms TP38 RX SSI Clock 7 5 47TP38 RX SSI Clock Test Point TP404 ...
Страница 710: ...9 2 40 UHF1 Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Страница 806: ...9 5 32 900MHz Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Страница 816: ...Index 4 August 16 2007 6816985H01 B Notes ...
Страница 817: ......