Kenwood NX-3400 Service Manual page 11

2.2.9 Transceiver Information Mode
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 firmware 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 be displayed even if the Radio Feature License (KWD-3004AE) is inactive.
2.3 CIRCUIT DESCRIPTION
2.3.1 Overview
The NX-3400 is 800/900MHz Dual Band Analog FM & Digital Portable transceiver designed to operate in the frequency range of 806
to 870MHz and 896 to 941MHz. 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 MPU/DSP (IC401). It is then amplified and fed to the antenna.
ANT
ANT
SW
FINAL DRIVE
AMP AMP
[ ]/[
Transceiver
firmware version
[ ]/[
VCO
TRANSCEIVER
IC
TCXO
19.2MHz
Fig.1 Frequency configuration
]
Encryption Library
Version
]
BASEBAND
CODEC
CIRCUIT
SP
MIC
(No.RA070<Rev.001>)1-11