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Vertex Standard
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VX-424A Series
Vertex Standard VX-424A Series User Manual
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5
Block Diagram
4
6
Table of Contents
Introduction
1
Specifications
2
Exploded View & Miscellaneous Parts
3
Block Diagram
5
Circuit Description
7
Receive Signal Path
7
Squelch Control
7
Transmit Signal Path
7
Automatic Transmit Power Control
8
Transmit Inhibit
8
Spurious Suppression
8
PLL Frequency Synthesizer
8
Miscellaneous Circuits
8
Alignment
9
Introduction
9
Required Test Equipment
9
Alignment Preparation & Precautions
9
PLL VCV (Varactor Control Voltage)
10
The Alignment Tool Outline
11
Reference Frequency
11
Transmitter Output Power
12
Max Deviation
13
CTCSS Deviation
14
Modulation Balance
15
DCS Deviation
16
LTR Deviation
17
Sequential Tone Deviation
18
STD Deviation
18
RX Tune (Sensitivity)
19
Tight Noise Squelch
19
Threshold Noise Squelch
20
Tight Noise Squelch RSSI
21
TX Save RSSI
22
MAIN-2 Unit
25
Lot. 1 ~ 5
25
Circuit Diagram
25
Parts Layout (Side A)
27
Parts Layout (Side B)
28
Lot. 6 ~
29
Circuit Diagram
29
Parts Layout (Side A)
31
Parts Layout (Side B)
32
Parts List
33
C 2xxx
33
CD 2xxx
37
CF 2xxx
37
D 2xxx
37
DS 2xxx
38
F 2xxx
38
FB 2xxx
38
HS 2xxx
38
J 2xxx
38
L 2xxx
38
MC 2xxx
39
P 2xxx
39
Q 2xxx
39
R 2xxx
40
S 2xxx
45
TH 2xxx
45
VR 2xxx
45
X 2xxx
45
XF 2xxx
45
DUMMY Unit
47
Circuit Diagram
47
Parts Layout
47
Parts List
47
FVP-25 Encryption / DTMF Pager Unit
48
Circuit Diagram
48
Parts Layout
48
Parts List
49
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Vertex Standard VX-424A Series Specifications
General
Brand
Vertex Standard
Model
VX-424A Series
Category
Transceiver
Language
English
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