Circuit Description; Transceiver Information Mode; Frequency Configuration - Kenwood NX-3220 K Service Manual

2.2.9 Transceiver Information Mode (K2, K3, E and E2 types only)
Use this function to confirm the transceiver firmware version, Encryption Library Version.
(1) Enter the Transceiver Information mode by using section "2.2.2 How to Enter Each Mode".
(2) The transceiver fi rmware version appears on the LCD.
(3) Use the [] and [] buttons to select the confirmation items.
(4) To exit the transceiver information mode, turn the transceiver power OFF.
Note:
The Encryption Library Version will also display Radio Feature License (KWD-3004AE) as Inactive.
2.3

CIRCUIT DESCRIPTION

2.3.1 Overview
The NX-3220 is a VHF Analog FM & Digital Portable transceiver designed to operate in the frequency range of 136 to 174MHz.
The NX-3320 is a UHF Analog FM & Digital Portable transceiver designed to operate in the frequency range of 400 to 520MHz.
The unit consists of a transceiver IC, a transmitter, a digital control unit, and a power supply circuit.

2.3.2 Frequency Configuration

The receiver uses the direct conversion system. Incoming signals from the antenna are mixed with the local signal from the PLL circuit
and converted to the baseband signal. The transmit signal frequency is generated by the VCO/PLL, and modulated by the signal from
the DSP. It is then amplified and fed to the antenna.
ANT
SW
FINAL DRIVE
AMP AMP
1-14 (No.RA053<Rev.001>)
[
Transceiver
firmware version
[
VCO
TRANSCEIVER
IC
TCXO
19.2MHz
Fig.1 Frequency configuration
]/[ ]
Encryption Library
Version
]/[ ]
BASEBAND
CIRCUIT
AF
AMP
CODEC
MIC
SP