
Schematics, Component Location Diagrams, and Parts Lists:
HUD4022A (VHF) Main Board
7-37
6815854H01-A
June 15, 2005
Figure 7-29. HUD4022A Frequency Generation Unit VHF Transmit Injection Schematic
APCO VHF TX Buffers
NP
73D02970C73-O
SHEET 18 OF 23
620.
16.p
R3882
C3790
C3917
470.p
C3921
3.p
3.p
7.5p
C3919
10.p
C3920
C3918
L3785
47.n
L3787
27.n
R3863
R3858
30.
R3859
180.
180.
C3876
R3764
10.n
C3871
10.n
2.K
2.K
R3757
1
TP6767
TP6768
1
TEST_POINT
TP6769
TEST_POINT
R3835
0.
1
R3842
C3872
100n
300.
18.
300.
82.
R3841
R3816
R3834
R3815
C3757
470.p
82.
18.p
C3875
L3779
120.n
470.p
C3865
180.
R3818
180.
R3824
30.
R3823
C3862
470.p
C3864
470.p
C3863
R3804
18.p
56.n
300.
L3778
300.
R3809
R3803
C3758
470.p
R3820
18.
B(,1),A(,1)
TX_Buffer_EN
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
TX_Inj
Keyed_9.1
B(,1),A(,1)
From_TX_VCO
B(,1),A(,1)
B(,1),A(,1)
Prescaler_Inj
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
Q3758
B(,1),A(,1)
R3819
180.
15.K
R3791
100n
C3754
100n
C3755
Q3759
R3792
5.6K
620.
R3807
R3795
IF3710
10.K
470.p
C3817
4.7K
R3797
22.
Summary of Contents for XTL 1500
Page 1: ......
Page 5: ...iv June 15 2005 6815854H01 A This page is intentionally left blank ...
Page 19: ...xviii List of Figures June 15 2005 6815854H01 A This page is intentionally left blank ...
Page 25: ...June 15 2005 6815854H01 A xxiv CommercialWarranty Notes ...
Page 35: ...June 15 2005 6815854H01 A xxxiv Model Numbering Charts and Specifications Notes ...
Page 49: ...June 15 2005 6815854H01 A 2 12 Product Overview Controller Section Notes ...
Page 161: ...June 15 2005 6815854H01 A 4 36 Troubleshooting Procedures Power Amplifier Procedures Notes ...
Page 225: ...June 15 2005 6815854H01 A 5 64 Troubleshooting Charts Flowcharts Notes ...
Page 429: ...8 2 Flex Cable Pin Out Lists Flex Cables June 15 2005 6815854H01 A Notes ...
Page 441: ...June 15 2005 6815854H01 A Glossary 10 Notes ...
Page 451: ...Index x June 15 2005 6815854H01 A This page is intentionally left blank ...