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
Содержание 2110 series
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