Operation Manual

Up-Converter
10MHz lo
Loc k_D etect 2
SPI_LO
LO
Local
LO
LO_Q
Oscillator
Test_Point_4
SPI_LO
Null
ALC
DAC
LO_I
2xLO
I+
LPF Balance
I-
Voltage-Controlled
Active
2
nd
Harmonic
Variable Gain
Q+ Mixer
S
Filter
n
Amplifier
electio
VGA
LPF Balance
Q-
+28V
RF Mute
Reflected
Down-Converter
Level
Detector
Voltage
LO
Variable
Attenuator
RF PAD Passive PAD
1 1
7 7
Sw itch 2dB Mixer 2dB
d
LPF
d
1:3
B B
Voltage
Variable
Attenuator B
PAD
d
8
6dB
1
Analog Board
IF I
UP-Converter
CH out
IF Q
Before Filter in
Down-Converter
Feedback
Test_Point_5
After Filter in
Up-Converter
10MHz lo
Loc k_D etect 2
SPI_LO
LO
Local
LO
LO_Q
Oscillator
Test_Point_4
SPI_LO
Null
ALC
DAC
LO_I
2xLO
I+
LPF Balance
I-
Voltage-Controlled
Active
2
nd
Harmonic
Variable Gain
Q+ Mixer
S
Filter
n
Amplifier
electio
VGA
LPF Balance
Q-
+28V
RF Mute
Reflected
Down-Converter
Level
Detector
Voltage
LO
Variable
Attenuator
RF PAD Passive PAD
1 1
7 7
Sw itch 2dB Mixer 2dB
d
LPF
d
1:3
B B
Voltage
Variable
Attenuator B
PAD
d
8
6dB
1
Analog Board
IF I
IF Q
CH out
Before Filter in
After Filter in
Feedback
Test_Point_5
Figure 1-6
2nd Part - Block Diagram: Exciter
Down-Converter
UP-Converter
Section
1
-
Introduction
(UHF
Digital
TV
Transmitters)
E
-
Compact
-
Air
Cooling
-
ATSC
-
High
Power
Manual Rev. 0.0
-
April 2016
1
-
11