OUSCU0TD-5200 Watt UHF Digital Transmitter

Instruction Manual















Innovator, CU0TD1/CU0RD1, 5 Watt – CU4TD/CU4RD, 2500 Watt UHF,
ATSC
Transmitter/
Regenerative
Translator















Axcera, LLC 103 Freedom Drive •
P.O. Box 525
• Lawrence, PA 150550525, USA
Phone:
7248738100
•
Fax:
7248738105
www.axcera.com
•
[email protected]











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Copyright
©
2011,
Axcera,
LLC
Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD Table of Contents ATSC Transmitter/Regenerative Translator
Instruction Manual, Rev. 1 i 10/19/11
Table of Contents Introduction ......................................................................................................1 Manual Overview............................................................................................1 Axcera Numbering System Explanation .............................................................1 Assembly Designators.....................................................................................2 Safety...........................................................................................................2 Contact Information........................................................................................3 Return Material Procedure ...............................................................................3 Limited One Year Warranty for Axcera Products..................................................4 System
Description ..........................................................................................11 Optional
Dual
Exciter
System
w/Axciter
Modulator
Trays................................14 Unpacking,
Installation
and
Maintenance ............................................................17 Unpacking ...................................................................................................17 Installation ..................................................................................................17 Drawer
Slide
Installation............................................................................18 AC
Input
Connections.......................................................................................19 Input
and
Output
Connections...........................................................................20 J11
Power
Monitoring
Connections .....................................................................22 Maintenance ................................................................................................24 Initial
On
Site
Turn
On
Procedure.......................................................................27 Typical
System
Operating
Parameters ................................................................28 Typical
Problems,
Indications
and
Causes
in
CU0TD/RD2
or
3
Drawer..................29 LCD
Display
and
Front
Panel
LED
Indicators ........................................................29 System
Remote
Connections
to
J12....................................................................31 LCD
Front
Panel
Screens...................................................................................32 Operation Screens........................................................................................34 Set Up Screens ............................................................................................41 (Optional)
Innovator
CXB
Series
Web
Ethernet
Interface
Kit
(1313100)..................49 (Optional)
Innovator
CXB
Series
SNMP
Ethernet
Interface
(1313079).....................54 Circuit
Descriptions
of
Boards
in
the
CU0TD/RD1
thru
CU0TD/RD5
Systems .........55 (A1) 8 VSB Demodulator Board (1308275) ......................................................55 Overview..................................................................................................55 Microcontroller
Functions............................................................................55 Jumper
and
DIP
Switch
Settings..................................................................55 (A2) Digital Modulator (1316332)...................................................................56 SMPTE310
or
ASI
input.............................................................................56 Channel
Coder ..........................................................................................56 Analog
Output
Section ...............................................................................56 Pilot
Frequency
Generation.........................................................................56 Voltage
Requirements................................................................................57 (A5) ALC Board, Innovator CX Series (1315006 or 1308570).............................57 (A6) Amplifier Assembly (1309621) – Used in the CU0TD/RD-1..........................59 (A6A1)
2
Stage
UHF
Amplifier
Board,
24V
(1309608) ...................................59 (A6)
Amplifier
Assembly
(1315008
used
w/External
Axciter
Drawer
or
1312566
used
in
all
other
applications)
–
Used
in
the
CU0TD/RD2
and
CU0TD/RD3......59 (A6A1)
2
Stage
UHF
Amplifier
Board
(1308784) ..........................................59 (A6A2)
RF
Module
Pallet,
Philips,
High
Output
(1309580)..............................60 (A6) Amplifier Assembly w/878 devices (1312191) – Used in the CU0TD/RD-4 & CU0TD/RD-5......…

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Axcera-CU0TD-5 FCC Equipment Authorization Report External Photos 11/30/2011 2-1 2. EXTERNAL PHOTOS 2.1 Front view, Axcera-CU0TD-5 Transmitter (Driver) Axcera-CU0TD-5 FCC Equipment Authorization Report External Photos 11/30/2011 2-2 2.2 Rear view, Axcera-CU0TD-5 Transmitter (Driver) Axcera-CU0TD-5 FCC Equipment Authorization Report External Photos 11/30/2011 2-3 2.3 Top view, Axcera-CU0TD-5 Transmitter (Driver)

Axcera-CU0TD-5 FCC Type Acceptance Report ID Label/Location Info 11/30/2011 1-1 1. ID LABEL/LOCATION INFO 1.1 Rear Panel FCC Label 1.2 Rear Panel Manufacturer’s Label Axcera-CU0TD-5 FCC Type Acceptance Report ID Label/Location Info 11/30/2011 1-2 1.3 Rear view, Axcera-CU0TD-5 Transmitter (driver) with FCC Label and Manufacturer’s Label

Axcera-CU0TD-5 FCC Equipment Authorization Report Internal Photos 11/30/2011 6-1 6. INTERNAL PHOTOS 6.1 Top view, CU0TD-5 Transmitter (Driver)

Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-1 4. TEST REPORT 4.1 RF Power Measurements Figure 4-1 shows the test equipment setup for the RF power measurements. Figure 4-1. Test Equipment Setup for RF Power Measurements The output power of the CU0TD-5 was adjusted to obtain 200 watts average RF output as observed on the power meter. At this power level, the final Measured Power: +13 dBm Coupling Loss: -40.0 dB Power: +53 dBm Power = 200 Watts With the power level properly set to 200 watts average, all required tests were performed and recorded in the following sections. CU0TD-5 Transmitter Hewlett Packard Power Meter Bird Model 8892-300 50 Ohm Termination Connecticut Microwave Directional Coupler RFA-300 Test Measurement Set & EFA 2067.3004.53 8VSB Demodulator HP Spectrum Analyzer Device Under Test Bandpass Filter Directional Coupler Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-2 4. 2 Modulation Characteristics The modulator tray incorporates a modulation technique known as 8-Level Vestigial Side-band (8-VSB), which uses a layered digital architecture and a single carrier frequency. A pilot tone is provided, to allow rapid acquisition of the signal by receivers. The 8-VSB system transmits a serial data bit stream at a rate of 19.4 Mbps in a 6 MHz television channel. This type of transmission is far less susceptible to propagation impairments such as multi-path, noise and interference as compared to analog transmissions. The modulator tray is fully adaptive to correct linear and nonlinear distortions. Figure 4-2. Typical Demodulation Test Setup CU0TD-5 Transmitter Directional Coupler 50 Ohm Termination 20 dB Attenuator Device Under Test EFA 2067.3004.53 8VSB Demodulator Bandpass Filter Directional Coupler RFA-300 Test Measurement Set Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-3 4. 3 Error Vector Magnitude (EVM) and Signal to Noise Ratio (SNR) The Rohde & Schwarz EFA Signal Analyzer was used to measure that the un-equalized patterns are within the ATSC/FCC EVM limit of 4% and SNR limit of 27db. Figure 4-3. SNR Measurement Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-4 4. 4 Frequency Response Figure 4-4. Frequency Response Plot Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-5 4. 5 Peak to Average Figure 4-5. Peak to Average Plot Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-6 4. 6 Phase Noise Figure 4-6. Phase Noise Plot Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-7 4.7 Occupied Bandwidth Using the test setup in Figure 4-2, with the transmitter operating at maximum power, a photograph of the transmitter occupied bandwidth spectrum was taken and is shown in Figure 4-7. Figure 4-7. Channel Occupied Bandwidth (Post-Filter) Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-8 4.8 Conducted Spurious Emissions The Hewlett Packard Spectrum Analyzer was used to measure harmonics before mask filter. The levels were then added to the filter attenuation at the 2 nd and 3 rd harmonics for a reading of less than -76dB at the output of the mask filter. Figure 4-8A. Reference (617.00 MHz) = 0dBc (Pre-Filter) Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-9 Figure 4-8B. Second Harmonic (1234.00 MHz) = -56 dBc(Pre-Filter) Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-10 Figure 4-8C. Third Harmonic (1851.00 MHz) = <-65 dBc (Pre-Filter) Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-11 Figure 4-8D. Bandpass Filter response Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-12 Figure 4-8E. Bandpass Filter Harmonic response Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-13 Figure 4-8F. Bandpass Filter response Harmonic (MHz) Level Relative to fundamental Filter Response (dB) Bandwidth correction (dB) Total (dB) Fundamental (527) ref ref --- ref Second (1054) -56 -104 10.3 -170.3 Third (1581) -65 -80 10.3 -155.3 Table 4-1. Post Filter Harmonic Levels The FCC rules require the energy to be measured in 500 kHz, and compared to the total channel power. The channel power is spread out evenly over an occupied bandwidth of 5.4 MHz. The total channel power is 10*log(5.4/0.5)=10.3 dB Frequency Relative Level (dBm) FCC Requirement (dBm) Fundamental 0 dB (reference) --- Second Harmonic -170 -76 Third Harmonic -155 --76 Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-14 Part 74.794 of the Rules states: (ii) Stringent mask. In the first 500kHz from the channel edges, emissions must be attenuated no less than 47 dB. More than 3 MHz from the channel edges, emissions must be attenuated no less than 76 dB. At any frequency between 0.5 and 3 MHz from the channel edges, emissions must be attenuated no less than the value determined by the following formula: A(dB) = 47 + 11.5 (Df-0.5) Figure 4-8J. Out of Band Emissions (Post Filter) Axcera – CU0TD-5 Equipment Authorization Report – Part 74 Test Report November 2011 4-15 4.9 Radiated Emissions Using the test setup shown in Figure 4-1, with the transmitter operating at full power, the spectrum analyzer was moved 3 meters from the transmitter and connected to a dipole antenna cut to the 617 MHz. This antenna was oriented to maximize the received level and the data was recorded. The antenna was then cut to the local oscillator frequency and the second and third through harmonic frequencies of the transmitter, and all of the signals received, were maximized by antenna orientation and their absolute levels were recorded. With these various antennas, the only measurable level observed was at 617 MHz. This level is shown below in Table 4-2 and an …

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