Functional description of PCBs
40 Manpack Transceiver 2110 series Repair Guide
Audio & Control PCB
The Audio & Control PCB performs the following functions:
• provides ADC and DAC conversion for both the Tx and Rx audio path via the codec
(IC302)
• compresses the digitised microphone Tx audio and reduces noise on the digitised Rx
audio via the DSP (IC202)
• controls the output level of the Tx and Rx audio
• voice mutes the Rx audio path (IC109, IC110, IC111, IC112, IC113)
• provides power on/off function
• stores the firmware for the transceiver
• stores the unique transceiver profile programmed by NSP
• stores real-time data such as transceiver addresses, signal strength and other
parameters for ALE
• regulates the battery voltage down to +5 V DC, +3.3 V DC and +1.8 V DC
• connects to the optional voice encryptor module
• provides battery-backed real time clock
The Audio & Control PCB contains:
• a codec, ADC (IC302)
• a DSP (IC202)
• a master PIC (IC104)
• a CPLD (IC301)
• an SRAM (IC205, IC206)
• a code flash (IC203, 204)
• a data flash (IC207)
• a real-time clock (IC103)
• a mute-detection circuit (IC109, IC110, IC111, IC112, IC113)
• several voltage regulators (IC105, 106, 108)
• a battery (G101)
• two crystals (Z101, Z201)
For details on the Audio & Control PCB,
Codan part number
See...
08-06128-001 Table 10 on page 41 and
Figure 13 on page 32
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