Radyne QAM256 User manual

QAM256
Digital Video Modulator
and Upconverter
Installation and Operation Manual
TM077
Revision 4.0
Radyne Corporation •3138 E. Elwood St. •Phoenix, AZ 85034 •[phone] •Fax: [phone] •www.radn.com

QAM256 Digital Video Modulator and Upconverter Warranty Policy
TM077 – Rev. 4.0 iii
Warranty Policy WP
Radyne Corp. (Seller) warrants the items manufactured and sold by Radyne Corp. to be free of defects in
material and workmanship for a period of two (2) years from date of shipment Radyne Corp.’s obligation
under its warranty is limited in accordance with the periods of time and all other conditions stated in all
provisions of this warranty.
This warranty applies only to defects in material and workmanship in products manufactured by Radyne
Corp. Radyne Corp. makes no warranty whatsoever concerning products or accessories not of its
manufacture. Repair, or at the option of Radyne Corp., replacement of the Radyne Corp. products or
defective parts therein shall be the sole and exclusive remedy for all valid warranty claims.
Warranty Period
The applicable warranty period shall commence on the date of shipment from a Radyne Corp. facility to the
original purchaser and extend for the stated period following the date of shipment. Upon beginning of the
applicable Radyne Corp. warranty period, all customers’ remedies shall be governed by the terms stated or
referenced in this warranty. In-warranty repaired or replacement products or parts are warranted only for the
remaining unexpired portion of the original warranty period applicable to the repaired or replaced products or
parts. Repair or replacement of products or parts under warranty does not extend the original warranty
period.
Warranty Coverage Limitations
The following are expressly not covered under warranty:
1. Any loss, damage and/or malfunction relating in any way to shipping, storage, accident, abuse,
alteration, misuse, neglect, failure to use products under normal operating conditions, failure to use
products according to any operating instructions provided by Radyne Corp., lack of routine care
and maintenance as indicated in any operating maintenance instructions, or failure to use or take
any proper precautions under the circumstances.
2. Products, items, parts, accessories, subassemblies, or components which are expendable in
normal use or are of limited life, such as but not limited to, bulbs, fuses, lamps, glassware, etc.
Radyne Corp. reserves the right to revise the foregoing list of what is covered under this warranty.
Warranty Replacement and Adjustment
Radyne Corp. will not make warranty adjustments for failures of products or parts, which occur after the
specified maximum adjustment period. Unless otherwise agreed, failure shall be deemed to have occurred
no more than seven (7) working days before the first date on which Radyne Corp. receives a notice of
failure. Under no circumstances shall any warranty exceed the period stated above unless expressly agreed
to in writing by Radyne Corp.
Liability Limitations
This warranty is expressly in lieu of and excludes all other express and implied warranties, Including but not
limited to warranties of merchantability and of fitness for particular purpose, use, or applications, and all
other obligations or liabilities on the part of Radyne Corp., unless such other warranties, obligations, or
liabilities are expressly agreed to in writing by Radyne Corp.
All obligations of Radyne Corp. under this warranty shall cease in the event its products or parts thereof
have been subjected to accident, abuse, alteration, misuse or neglect, or which have not been operated and
maintained in accordance with proper operating instructions.

Warranty Policy QAM256 Digital Video Modulator and Upconverter
iv TM077 - Rev. 4.0
In no event shall Radyne Corp. be liable for Incidental, consequential, special or resulting loss or damage of
any kind howsoever caused. Radyne Corp.’s liability for damages shall not exceed the payment, if any,
received by Radyne Corp. for the unit or product or service furnished or to be furnished, as the case may be,
which is the subject of claim or dispute.
Statements made by any person, including representatives of Radyne Corp., which are inconsistent or in
conflict with the terms of this warranty, shall not be binding upon Radyne Corp. unless reduced to writing
and approved by an officer of Radyne Corp.
Warranty Repair Return Procedure
Before a warranty repair can be accomplished, a Repair Authorization must be received. It is at this time
that Radyne Corp. will authorize the product or part to be returned to the Radyne Corp. facility or if field
repair will be accomplished. The Repair Authorization may be requested in writing or by calling:
Radyne Corporation
3138 E. Elwood St.
Phoenix, Arizona 85034 (USA)
ATTN: Customer Support
Phone: [phone]
Fax: [phone]
Any product returned to Radyne Corp. for examination must be sent prepaid via the means of transportation
indicated as acceptable to Radyne Corp. Return Authorization Number must be clearly marked on the
shipping label. Returned products or parts should be carefully packaged in the original container, if possible,
and unless otherwise indicated, shipped to the above address.
Non-Warranty Repair
When a product is returned for any reason, Customer and its shipping agency shall be responsible for all
damage resulting from improper packing and handling, and for loss in transit, not withstanding any defect or
nonconformity in the product. By returning a product, the owner grants Radyne Corp. permission to open
and disassemble the product as required for evaluation. In all cases, Radyne Corp. has sole responsibility
for determining the cause and nature of failure, and Radyne Corp.’s determination with regard thereto shall
be final.

QAM256 Digital Video Modulator and Upconverter Preface
TM077 – Rev. 4.0 v
Preface P
This manual provides installation and operation information for the Radyne QAM256 Digital Video
Modulator and Upconverter. This is a technical document intended for use by engineers,
technicians, and operators responsible for the operation and maintenance of the QAM256.
Conventions
Whenever the information within this manual instructs the operator to press a pushbutton switch
or keypad key on the Front Panel, the pushbutton or key label will be shown enclosed in "less
than" (<) and "greater than" (>) brackets. For example, the Reset Alarms Pushbutton will be
shown as <RESET ALARMS>, while a command that calls for the entry of a ‘7’ followed by
‘ENTER’ Key will be represented as <7,ENTER>.
Cautions and Warnings
A caution icon indicates a hazardous situation that if not avoided, may result in minor or moderate
injury. Caution may also be used to indicate other unsafe practices or risks of property damage.
A warning icon indicates a potentially hazardous situation that if not avoided, could result in death
or serious injury.
A note icon identifies information for the proper operation of your equipment, including helpful
hints, shortcuts, or important reminders.

Preface QAM256 Digital Video Modulator and Upconverter
vi TM077 - Rev. 4.0
Trademarks
Product names mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereby acknowledged.
Copyright
©2008, Radyne Corp. This manual is proprietary to Radyne Corp. and is intended for the
exclusive use of Radyne Corp.’s customers. No part of this document may in whole or in part, be
copied, reproduced, distributed, translated or reduced to any electronic or magnetic storage
medium without the express written consent of a duly authorized officer of Radyne Corp.
Disclaimer
This manual has been thoroughly reviewed for accuracy. All statements, technical information,
and recommendations contained herein and in any guides or related documents are believed
reliable, but the accuracy and completeness thereof are not guaranteed or warranted, and they
are not intended to be, nor should they be understood to be, representations or warranties
concerning the products described. Radyne Corp. assumes no responsibility for use of any
circuitry other than the circuitry employed in Radyne Corp. systems and equipment. Furthermore,
since Radyne Corp. is constantly improving its products, reserves the right to make changes in
the specifications of products, or in this manual at any time without notice and without obligation
to notify any person of such changes.
Record of Revisions
Revision
Level Date Reason for Change
1.0 1-1-99 New Release
1.1 3-30-99 Clarified DVB ASI information, revised data rates in Specifications section
2.0 4-5-01 Merged TM077 QAM256 Digital Video Modulator with TM084 QAM256
Digital Video Modulator and Upconverter Manuals
3.0 12-3-02 Revised and reformatted Technical Manual. Revised Figure 5-1.
3.1 1-20-04 Revised and reformatted Technical Manual.
3.2 12-29-04 Changed Power Output Accuracy from ± .50 to ± 1.0 dB. Reformatted
manual.
4.0 4-29-08 Correct product performance stated.
Comments or Suggestions Concerning this Manual
Comments or suggestions regarding the content and design of this manual are appreciated. To
submit comments, please contact the Radyne Corp. Customer Service Department.

QAM256 Digital Video Modulator and Upconverter Table of Contents
TM077 – Rev. 4.0 vii
Table of Contents ToC
Section 1 - Introduction_______________________________________________ 1-1
1.0 Introduction ______________________________________________________ 1-1
Section 2 - Installation________________________________________________ 2-1
2.0 Installation Requirements ___________________________________________ 2-1
2.1 Unpacking _______________________________________________________ 2-1
2.2 Removal and Assembly ____________________________________________ 2-2
2.3 Mounting Considerations ___________________________________________ 2-2
Section 3 - Theory of Operation ________________________________________ 3-1
3.0 Theory of Operation _______________________________________________ 3-1
3.1 QAM256 Operation ________________________________________________ 3-1
Section 4 - User Interfaces ____________________________________________ 4-1
4.0 User Interfaces ___________________________________________________ 4-1
4.1 Front Panel User Interface __________________________________________ 4-1
4.1.1 LCD Front Panel Display __________________________________________ 4-2
4.1.2 Cursor Control Arrow Keys ________________________________________ 4-2
4.1.3 Numeric Keypad_________________________________________________ 4-2
4.1.4 Front Panel LED Indicators ________________________________________ 4-3
4.2 Parameter Setup __________________________________________________ 4-3
4.3 Front Panel Control Screen Menus____________________________________ 4-4
4.3.1 Main Menus ____________________________________________________ 4-4
4.3.2 Modulator Menu Options and Parameters _____________________________ 4-4
4.3.3 Interface Menu Options and Parameters ______________________________ 4-5
4.3.4 Monitor Menu Options and Parameters _______________________________ 4-6
4.3.5 Alarms Menu Options and Parameters _______________________________ 4-6
4.3.6 System Menu Options and Parameters _______________________________ 4-7
4.3.7 Test Menu Options and Parameters _________________________________ 4-7
4.4 Terminal Port User Interface _________________________________________ 4-7

Table of Contents QAM256 Digital Video Modulator and Upconverter
viii TM077 - Rev. 4.0
4.5 Connecting the Terminal____________________________________________ 4-8
4-6 Terminal Screens _________________________________________________ 4-8
4.7 QAM256 Terminal Mode Control ____________________________________ 4-12
4.8 Sample Terminal Mode Control Screen Menus _________________________ 4-12
4.9 Management Information Base Structure ______________________________ 4-13
4.10 Simple Network Management Protocol (SNMP) ________________________ 4-13
4.11 The Management Information Base (MIB) ____________________________ 4-13
4.12 Directory ______________________________________________________ 4-13
4.13 Mgmt _________________________________________________________ 4-13
4.14 Experimental ___________________________________________________ 4-13
4.15 Private________________________________________________________ 4-13
Section 5 - Rear Panel Interfaces _______________________________________ 5-1
5.0 QAM256 Rear Panel Interfaces/Connections ____________________________ 5-1
5.1 AC Power _______________________________________________________ 5-1
5.2 FAULT Connection ________________________________________________ 5-1
5.3 TX MON Port_____________________________________________________ 5-2
5.4 TX IF Port _______________________________________________________ 5-2
5.5 ASI/Parallel Interface Connections ____________________________________ 5-4
5.5.1 TX PARALLEL Connector _________________________________________ 5-4
5.5.2 REMOTE Connector _____________________________________________ 5-4
5.5.3 TX ASI Connector _______________________________________________ 5-4
5.6 ASI and Advanced ASI Interfaces_____________________________________ 5-4
5.7 Framing/Interface Compatibility ______________________________________ 5-5
5.8 Optional DVB Interface _____________________________________________ 5-5
Section 6 - Maintenance and Troubleshooting ____________________________ 6-1
6.0 Periodic Maintenance ______________________________________________ 6-1
Section 7 - Technical Specifications ____________________________________ 7-1
7.0 Introduction ______________________________________________________ 7-1
7.1 Specifications Without Cable Upconverter ______________________________ 7-1
7.1.1 IF Interface_____________________________________________________ 7-1
7.1.2 Baseband Interface ______________________________________________ 7-1
7.1.3 Remote Interface ________________________________________________ 7-1

QAM256 Digital Video Modulator and Upconverter Table of Contents
TM077 – Rev. 4.0 ix
7.1.4 Physical _______________________________________________________ 7-1
7.2 Specifications With Cable Upconverter_________________________________ 7-1
7.2.1 RF Interface ____________________________________________________ 7-2
7.2.2 Baseband Interface ______________________________________________ 7-2
7.2.3 Remote Interface ________________________________________________ 7-2
7.2.4 Physical _______________________________________________________ 7-2
Appendix A - Product Options _________________________________________A-1
Appendix A.0 QAM256 Data Rates_______________________________________ A-1
Appendix B - SNMP MIB ______________________________________________ B-1
Appendix C - RLLP Protocol___________________________________________C-1
C.0 Remote Operations _______________________________________________ C-1
C.1 Host Computer Remote Communications ______________________________ C-1
C.1.1 Protocol Structure _______________________________________________ C-1
C.1.2 Protocol Wrapper________________________________________________ C-2
C.1.3 Frame Description Bus Handshaking ________________________________ C-3
C.1.4 Global Response Operational Codes ________________________________ C-4
C.1.5 Collision Avoidance ______________________________________________ C-5
C.1.6 Software Compatibility____________________________________________ C-6
C.1.7 Flow Control and Task Processing __________________________________ C-6
C.1.8 RLLP Summary _________________________________________________ C-7
C.2 Remote Port Modes of Operation_____________________________________ C-9
Glossary ___________________________________________________________G-1

Table of Contents QAM256 Digital Video Modulator and Upconverter
x TM077 - Rev. 4.0

QAM256 Digital Video Modulator and Upconverter Introduction
TM077 – Rev. 4.0 1-1
Introduction 1
This chapter provides an overview of the QAM256 Digital Video Modulator and Upconverter. The
QAM256 may be referred to in this manual as “the unit”, or the modulator”.
1.0 Introduction
The Radyne Corporation new DVB-compliant QAM256 Digital Video Modulator and Upconverter
meet all DVB requirements for transmission of digital video over broadband coaxial cable and
microwave radio. The QAM256 features 4 QAM to 256 QAM modulation, 1 - 52 Mbps data rate,
1 - 8 MHz channel spacing, and Reed-Solomon Forward Error Correction. The QAM256
modulator supports output frequency of 35 to 37 MHz or 43 to 44 MHz or 50 to 862 MHz. The
upconverter combines the QAM Modulator and Frequency converter into a 1 Rack Unit (RU)
chassis (1.75” high) which eliminates the need for an additional converter unit. The modulator
also supports field-changeable RS-422 Parallel, DVB Parallel, M2P Parallel, ASI, and other
standard interfaces. Remote Monitor and Control interface is provided through either an RS-485
or Ethernet Remote Port using SNMP protocol.
The QAM256 provides efficient bandwidth utilization for digital video distribution systems.
MMDS, LMDS and Cable Television systems all benefit from this innovative modulator. QAM
modulation solves the problem of providing multiple video and data channels within bandwidth
limitations. The Radyne QAM256 Upconverter has the versatility to adapt to any terrestrial
broadband medium and give system operators full management and control of the available
bandwidth.
The modulator meets the specifications of the ITU-T Recommendation; J.83 Annex A&B
(Telecommunication Standardization of the ITU for Television and Sound Transmission). The
microprocessor-based Monitor and Control (M&C) operates from the front panel or the remote
port.
The Interface Module is a field-changeable module that contains either RS-422, M2P, DVB,
Parallel, ASI, or other standard interface. The interface can accept data in an MPEG-2 transport
format, or as random data.
Figure 1-1. QAM256 Digital Video Modulator and Cable Upconverter Front Panel

Introduction QAM256 Digital Video Modulator and Upconverter
1-2 TM077 - Rev. 4.0

QAM256 Digital Video Modulator and Upconverter Installation
TM077 – Rev. 4.0 2-1
Installation 2
This section provides unpacking and installation instructions, and a description of external
connections and backward alarm information.
2.0 Installation Requirements
The QAM256 Modem is designed to be installed within any standard 19-inch wide equipment
cabinet or rack, and requires one rack unit (RU) of mounting space (1.75 inches) vertically and
17¾ inches of depth. Including cabling, a minimum of 20 inches of rack depth is required. The
rear panel of the modem is designed to have power enter from the left and IF Cabling enter from
the right when viewed from the rear of the unit. Data and Control Cabling can enter from either
side although they are closer to the center. The unit can be placed on a table or suitable surface
if required.
There are no user-serviceable parts or configuration settings
located inside the QAM256 Chassis. There is a potential shock
hazard internally at the Power Supply Module. DO NOT open the
QAM256 Chassis under any circumstances. Always disconnect the
main plug before servicing of any kind.
Before initially applying power to the unit, it is a good idea to disconnect
the transmit output from the operating ground station equipment. This is
especially true if the current QAM256 configuration settings are
unknown, where incorrect settings could disrupt existing
communications traffic.
2.1 Unpacking
The QAM256 Digital Video Modulator and Upconverter was carefully packaged to avoid damage
and should arrive complete with the following items for proper installation:
QAM256 Unit
Power Cord, with applicable AC Connector
Installation and Operation Manual

Installation QAM256 Digital Video Modulator and Upconverter
2-2 TM077 - Rev. 4.0
2.2 Removal and Assembly
Carefully unpack the unit and ensure that all of the above items are in the carton. If the Prime AC
power available at the installation site requires a different Power Cord/AC Connector, then
arrangements to receive the proper device will be necessary before proceeding with the
installation.
The QAM256 unit is shipped fully assembled and does not require removal of the covers for any
purpose in installation. Should the power cable AC connector be of the wrong type for the
installation, either the cable or the power connector end should be replaced. The power supply
itself is designed for universal application using from 100 to 240 VAC, 50 to 60 Hz, 1 A.
Always ensure that power is removed from the QAM256 before removing
or installing a UIM. Failure to do so may cause damage to the equipment.
2.3 Mounting Considerations
When mounted in an equipment rack, adequate ventilation must be provided. The ambient
temperature in the rack should preferably be between 10°and 35°C, and held constant for best
equipment operation. The air available to the rack should be clean and relatively dry. The
modems may be stacked one on top of the other to a maximum of 10 consecutive units before
providing one (1) RU of space for airflow. Modems should not be placed immediately above a
high-heat or EMF Generator to ensure the output signal integrity and proper receive operation.
Do not mount the QAM256 in an unprotected outdoor location where there is direct contact with
rain, snow, wind or sun. The only tools required for rack mounting the QAM256 are four (4)
customer supplied rack-mounting screws and the appropriate screwdriver. Rack mounting
brackets are an integral part of the cast front bezel of the unit and are not removable.
Shielded cables with the shield terminated to the conductive backshells are required in order to
meet EMC directives. Cables with insulation flammability ratings of 94 VO or better are required
in order to meet low voltage directives.

QAM256 Digital Video Modulator and Upconverter Installation
TM077 – Rev. 4.0 2-3

QAM256 Digital Video Modulator and Upconverter Theory of Operation
TM077 – Rev. 4.0 3-1
Theory of Operation 3
3.0 Theory of Operation
A digital terrestrial interface supplies the modulator with a data stream. The data stream is
synchronized if the incoming stream is framed. The data is scrambled, and FEC is added. The
data is then convolutionally encoded, punctured, then constellation mapped. The resulting I&Q
symbols are digitally filtered. The data is then converted into an analog waveform and is vector
modulated onto an RF Carrier produced from the Transmit IF Synthesizer Circuitry.
3.1 QAM256 Operation
A block diagram of the signal flow is shown in Figure 3-1 below.
Figure 3-1. Functional Block Diagram

Theory of Operation QAM256 Digital Video Modulator and Upconverter
3-2 TM077 - Rev. 4.0

QAM256 Digital Video Modulator and Upconverter User Interfaces
TM077 – Rev. 4.0 4-1
User Interfaces 4
4.0 User Interfaces
Operation of the QAM256 consists of controlling the unit operating parameters and monitoring
status and responses via one of the control interfaces. The two user interfaces available from the
Front Panel are Front Panel Control, and Terminal Mode Control (not currently available). Either
of these methods may be used separately or together to monitor and control the QAM256.
4.1 Front Panel User Interface
The Front Panel of the QAM256 allows for complete control and monitor of all QAM256
parameters and functions via the Keypad, LCD Display and Status LEDs.
The front panel layout is shown in Figure 4-1, showing the location and labeling of the front panel.
The front panel is divided into four functional areas: the LCD Front Panel Display, the Cursor
Control Arrow Keys, the Numeric Keypad, and the Front Panel LED Indicators, each described
below in Table 4-1.
1 2 3 4
Figure 4-1. QAM256 Front Panel
Table 4-1.
Item Number Description Function
1 LCD Front Panel Display Displays QAM256 Operating parameters
and Configuration data
2 Cursor Control Arrow Keys Controls the up, down, right and left motion
of the cursor in the LCD Display window
3 Numeric Keypad Allows entry of numeric data and Clear and
Enter function keys
4 Front Panel LED Indicators See Paragraph 4.1.2 below for an itemized
description of these LEDs

User Interfaces QAM256 Digital Video Modulator and Upconverter
4-2 TM077 - Rev. 4.0
4.1.1 LCD Front Panel Display
The front panel display is a 2 line by 16-character LCD display. The display is lighted and the
brightness can be set to increase when the front panel is currently in use. The LCD display
automatically dims after a period of inactivity. The display has two distinct areas showing current
information. The upper area shows the current parameter being monitored, such as ‘Frequency’
or ‘Data Rate’. The lower line shows the current value of that parameter. The LCD display is a
single entry window into the large matrix of parameters that can be monitored and set from the
Front Panel.
4.1.2 Cursor Control Arrow Keys
A set of ‘Arrow’ or ‘Cursor’ keys (↑), (↓), (→), (←), is used to navigate the parameter currently
being monitored or controlled. Table 4-2 describes the functions available at the Front Panel.
4.1.3 Numeric Keypad
A 10 Key Numeric Keypad with 2 additional keys for the ‘Enter’ and ‘Clear’ function allows the
entry of data into the system. Table 4-2 describes the functions available at the Front Panel.
Table 4-2.
Edit Mode Key Functions (Front Panel Only)
Parameter
Type
0 – 9 ↑↓←→‘Clear’ &
←
‘Clear’ &
→
Fixed Point
Decimal
Changes Digit Toggles ±
(If Signed)
Toggles ±
(If Signed)
Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
N/A N/A
Unsigned
Hexadecimal
Changes Digit Increments
Digit Value
Decrements
Digit Value
Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
N/A N/A
Enumerated N/A Previous
Value in
List
Next
Value in
List
N/A N/A N/A N/A
Date/ Time Changes Digit N/A N/A Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
N/A N/A
IP Address Changes Digit Increments
Digit Value
Decrements
Digit Value
Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
N/A N/A
Text Strings Changes
Character
Increments
Character
Value
Decrements
Character
Value
Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
Clears to
Left of
Cursor
Inclusive
Clears to
Right of
Cursor
Inclusive

QAM256 Digital Video Modulator and Upconverter User Interfaces
TM077 – Rev. 4.0 4-3
4.1.4 Front Panel LED Indicators
Eight LEDs on the QAM256 Front Panel (Refer to Table 4-3) indicate the status of the QAM256’s
operation. The LED colors maintain a consistent meaning. Green signifies that the indication is
appropriate for normal operation, Yellow means that there is a condition not proper for normal
operation, and Red indicates a fault condition that will result in lost communications.
Table 4-3.
LED Color Function
Transmit On Green Indicates that the QAM256 Transmitter is turned on.
Major Alarm Red Indicates that the transmit direction has failed, losing traffic.
Minor Alarm Yellow Indicates that a transmit receive warning condition exists.
Test Mode Yellow Indicates that the modulator is involved in a current test
mode activity.
Power Green Indicates that the unit is turned on.
Fault Red Indicates a hardware fault for the unit.
Event Yellow Indicates that a condition or event has occurred that the unit
has stored in memory.
Remote Green Indicates that the unit is set to respond to the remote control
or terminal input.
4.2 Parameter Setup
The four Cursor Control Arrow Keys are used to navigate the menu tree and select the parameter
to be set. After arriving at a parameter that needs to be modified, depress <ENTER>. The first
space of the modifiable parameter highlights (blinks) and is ready for a new parameter to be
entered. After entering the new parameter using the keypad (Refer to Figure 4-2), depress
<ENTER> to lock in the new parameter. If a change needs to be made prior to pressing
<ENTER>, depress <CLEAR> and the display defaults back to the original parameter. Depress
<ENTER> again and re-enter the new parameters followed by <ENTER>.
Following a valid input, the QAM256 will place the new setting into the nonvolatile EEPROM
making it available immediately and available the next time the unit is powered-up.’
Figure 4-2. Entering New Parameters

User Interfaces QAM256 Digital Video Modulator and Upconverter
4-4 TM077 - Rev. 4.0
4.3 Front Panel Control Screen Menus
The QAM256 Front Panel Control Screens are broken down into sections under several Main
Menus.
4.3.1 Main Menus
Modulator
Interface
Monitor
Alarms
System
Test
4.3.2 Modulator Menu Options and Parameters
Frequency: {50 MHz – 862 MHz}
Cable Upconverter
{35 MHz – 37 MHz}
Optional
{43 MHz – 44 MHz}
Optional
Encoder Type: ITU-T J.83 Annex A {DVB/DAVIC}
ITU-T J.83 Annex B {DigiCipherII}
Modulation: {4, 16, 32, 64, 128, 256 QAM}
Data Rate: {1 - 52 Mbps}
Refer to Table A-1.
Interleaver: DVB {12, 17}
Trellis {204, 1}
Spectrum: {Normal, Inverted}
Tx Power: {+60 dBmV to +45 dBmV}
With Cable Upconverter
{+0.0dBm to –25.0 dBm}
Without Cable Converter
Tx Enable: {On, Off}
Symbol Rate: {7.1 Msps maximum}
Roll Off: {0.12, 0.15, 0.18}
Framing: {MPEG 187, 188, 204}