Nucomm CHANNELMASTER TX7 User manual

CHANNELMASTER TX7
Portable Microwave Transmitter
User Manual
NUCOMM PUBLICATION: M01-0029-00A, REV 1.03

Revision 1.03
ii ChannelMaster TX7 Transmitter
CAUTION!
RISK OF ELECTRICAL SHOCK. DO NOT REMOVE EQUIPMENT COVERS.
•Do not remove any equipment covers.
•Refer servicing to qualified technicians only.
•Disconnect all power before servicing.
•Read and perform all instructions carefully. Failure to follow suggested instruc-
tions and guidelines may void all warranties.
FCC STATEMENT
This equipment has been tested and found to comply with
Part 74.637 (a) (2) of the FCC Rules and Regulations.
Any unauthorized changes or modifications not expressly approved by
Nucomm, Inc. could void the user’s authority to operate the equipment, and
invalidate the equipment’s warranty.

Revision 1.03
iii
Proprietary Information and Disclaimer Notice
All information and graphic images contained within this manual are the sole property of Nu-
comm, Inc. and are issued in the strictest of confidence. This material may not be reproduced,
stored, copied, or converted in any form, nor shall it be disclosed to others or used for manufac-
turing or any other purpose without the written permission of an authorized Nucomm represen-
tative.
Nucomm, Inc. has made every effort to ensure the accuracy of this material at the time of printing.
However, as the specifications, equipment, and this manual are subject to change without notice,
Nucomm, Inc. assumes no responsibility or liability whatsoever for any errors or inaccuracies that
may appear in this manual, or for any decisions based on its use. This manual is supplied for
informational purposes only and should not be construed as a commitment by Nucomm, Inc.
Warranty
Equipment manufactured by Nucomm, Inc. is warranted to meet all published specifications and
to be free from defects in material and workmanship within a period of two years from date of
shipment from Nucomm. The company’s liability under this warranty is limited to:
•Servicing or adjusting equipment.
•Replacement of defective parts.
Any equipment returned to the factory shall have the freight paid for by the buyer.
Equipment showing damage by misuse, abnormal conditions of operation, or attempts to repair
by other than authorized service personnel shall be excluded from this warranty. Nucomm, Inc.
shall in no event be responsible for incidental injury or property damage. Since Nucomm, Inc.
has no control over conditions of use, no warranty is made or implied as to suitability for the
customer’s intended use, beyond such performance specifications as are made part of the pur-
chase order. There are no warranties expressed or implied, except as stated herein. This limi-
tation on warranties shall not be modified by verbal representations.
Shipping Damage
Equipment shipped FOB Nucomm, Inc.; shall become the property of buyer upon delivery and
receipt from carrier. Any damage in shipment should be handled by the buyer directly with the
carrier. Immediately request the carrier’s inspection upon evidence of damage in shipment.
Field Service
Nucomm products are designed with easy access to components to facilitate service. However,
some Nucomm modules cannot be service in the field. To prevent voiding of the Nucomm
warranty, please contact Nucomm before servicing or making any repairs. The user is cautioned
to read all module descriptions in this manual. Warnings are included in the circuit descriptions
and on certain modules themselves.
Replacement Modules
Troubleshooting to the component level is often not cost-effective and frequently impossible.
Often the practical method of effecting repairs is to substitute known good spare modules for
suspect units. Replacement modules for Nucomm’s standard product line are usually available.

Revision 1.03
iv ChannelMaster TX7 Transmitter
Technical Support Information
Technical Support personnel are available to extend technical assistance to customers while
installing, operating, or troubleshooting Nucomm equipment. Please have your model number and
serial number available.
Telephone
During Nucomm business hours, 8:30am - 5:30pm EST (-5 Hours, GMT), call:
US ......................................................908-852-3700
International........................................001-1-908-852-3700
After hours, call:
US or International..............................888-531-3892
Email Email [e-mail]
Internet
Web address..................................................www.nucomm.com
Equipment Returns
If equipment cannot be successfully restored through telephone consultation, return to the factory
may be required. Loaner items may be available until the repaired items are returned.
For out-of-warranty equipment only: Nucomm evaluates all returned units, and then confers with
the client on corrective action. If no fault is found, or no corrective action is authorized, a
diagnostic fee may be charged.
Prior to returning a Nucomm product to the factory, please obtain a return material authorization
(RMA) number and shipping instructions from Nucomm.
When returning equipment to Nucomm, it is very helpful to enclose a note containing the
following:
•RMA number.
•Serial number.
•A detailed description of the problem.
•Name of an engineer or technician we may contact regarding problems encountered.
•A “ship to” and “bill to” address.
Ship all returns to:
Nucomm, Inc
Attn: RMA# (your RMA number)
101 Bilby Rd
Hackettstown, NJ 07840, USA
[phone]
For International returns:
In addition to the instructions above, when shipping internationally Nucomm recommends the use
of a courier such as Federal Express, UPS, etc, and that the goods be shipped DOOR-TO-DOOR
PRE-PAID. This will reduce Customs costs, handling charges and delays. Enclose all the
information above, plus a statement that the equipment was manufactured in the United States
(the latter is needed to expedite customs processing).

Revision 1.03
v
TABLE OF CONTENTS
1. PRODUCT DESCRIPTION...................................................................................................................1-1
1.1 Introduction.........................................................................................................................................1-1
1.2 Model Numbering Scheme................................................................................................................1-2
2. FEATURES............................................................................................................................................2-1
2.1 Feature Overview...............................................................................................................................2-1
2.2 System Functional Block Diagram ....................................................................................................2-3
2.3 System Chassis Features..................................................................................................................2-4
2.4 User Interface Overview ....................................................................................................................2-4
2.5 Standby Mode....................................................................................................................................2-4
2.6 Video Signal Encoding.......................................................................................................................2-4
2.7 Audio Sub Carriers.............................................................................................................................2-4
2.8 Multi-Mode Modulator........................................................................................................................2-4
2.9 Multi-band Microwave Output............................................................................................................2-5
2.10 Signal Strength Indicators..................................................................................................................2-5
2.11 Video Presence Detector...................................................................................................................2-5
2.12 Remote Control Feature....................................................................................................................2-5
2.13 Power Supply.....................................................................................................................................2-5
2.14 Internal Self-Test................................................................................................................................2-5
2.15 Other Standard Features...................................................................................................................2-5
2.16 Options ...............................................................................................................................................2-6
2.17 Accessories........................................................................................................................................2-6
2.18 Flexibility.............................................................................................................................................2-6
3. SPECIFICATIONS AND FREQUENCY PLANS..................................................................................3-1
3.1 Frequency Plans (USA).....................................................................................................................3-6
4. INSTALLATION .....................................................................................................................................4-1
4.1 Unpacking and Inspection .................................................................................................................4-1
4.2 Pre-Installation Checkout...................................................................................................................4-1
4.3 Mechanical Installation.......................................................................................................................4-1
4.4 Electrical Installation ..........................................................................................................................4-3
4.5 Power Connection..............................................................................................................................4-3
4.6 ASI, SDI, Composite & 70MHz Ports................................................................................................4-3
4.7 RF OUTPUT.......................................................................................................................................4-4
4.8 Serial Port...........................................................................................................................................4-4
4.9 POWER SWITCH and FUSES..........................................................................................................4-4
4.10 Models with Multi-Pin “MS” Style Audio Connectors.......................................................................4-4
4.11 Models With XLR Audio Connectors.................................................................................................4-4
4.12 Firewire...............................................................................................................................................4-4
5. OPERATION..........................................................................................................................................5-1
5.1 Power Up Displays.............................................................................................................................5-1
5.1.1 Changing Characters .................................................................................................................5-2
5.2 Front Panel Buttons ...........................................................................................................................5-2
5.2.1 Changing Operating Frequency.................................................................................................5-3
5.3 Using Presets.....................................................................................................................................5-3
5.4 Status Indicators & Test Gen.............................................................................................................5-6
5.5 Main Menu Selections........................................................................................................................5-7
5.6 Input Menu Selections .......................................................................................................................5-7
5.7 Modulation Menu Selections..............................................................................................................5-8
5.7.1 FM...............................................................................................................................................5-8
5.7.2 COFDM.......................................................................................................................................5-9
5.7.3 VSB...........................................................................................................................................5-12
5.8 Encoder Menu Selections................................................................................................................5-12

Revision 1.03
vi ChannelMaster TX7 Transmitter
5.8.1 AUDIO.......................................................................................................................................5-12
5.8.2 VIDEO.......................................................................................................................................5-13
5.8.3 SERVICE..................................................................................................................................5-13
5.9 System Menu Selections.................................................................................................................5-13
5.9.1 OPTIONS..................................................................................................................................5-14
5.9.2 REMOTE...................................................................................................................................5-14
5.9.3 VERSION..................................................................................................................................5-14
5.9.4 RESTORE ................................................................................................................................5-15
5.9.5 FREQUENCY...........................................................................................................................5-15
5.9.6 FACTORY.................................................................................................................................5-15
5.9.7 BAS...........................................................................................................................................5-15
5.10 Monitoring Menu Selections ............................................................................................................5-15
5.10.1 MONITOR.................................................................................................................................5-15
5.10.2 ALARM......................................................................................................................................5-16
5.11 BAS Relocation Settings..................................................................................................................5-17
5.11.1 Audio Sub-Carrier Frequency..................................................................................................5-17
5.11.2 Channel Bandwidth and Band Plan.........................................................................................5-18
5.11.3 Switchover to “Post-relocation” Settings..................................................................................5-18
LIST OF TABLES
Table 2-1: ChannelMaster TX7 Technical Features and Benefits ..................................................................2-2
Table 3-1: ChannelMaster TX7 Specifications.................................................................................................3-1
Table 3-2: Frequency Plan (US), 2GHz 17MHz...............................................................................................3-6
Table 3-3: Frequency Plan (US), 2GHz 12MHz...............................................................................................3-7
Table 3-4: Frequency Plan (US), 6/7GHz........................................................................................................3-8
Table 3-5: Frequency Plan (US), 12/13 GHz..................................................................................................3-9
Table 5-1: ChannelMaster 8 MHz B/W Data Rates.......................................................................................5-10
Table 5-2: ChannelMaster 7 MHz B/W Data Rates.......................................................................................5-11
Table 5-3: ChannelMaster 6 MHz B/W Data Rates.......................................................................................5-11
Table 5-4: VSB Data Rates for BW=6 MHz...................................................................................................5-12
LIST OF FIGURES
Figure 2-1: ChannelMaster TX7 Functional Block Diagram............................................................................2-3
Figure 4-1: Pre-Installation Checkout Equipment Configuration.....................................................................4-1
Figure 4-2: CMTX7 Mounting Hole Locations and Screw Sizes.....................................................................4-2
Figure 4-3: CMTX7 Unit with Shroud ...............................................................................................................4-3
Figure 4-4: CMTX7 Unit with Shroud (Shows Built-in Cooling Fans)..............................................................4-3
Figure 4-5: ChannelMaster TX7 Front Panel (Mil Connector Version)...........................................................4-5
Figure 4-6: ChannelMaster TX7 Front Panel (XLR Version)...........................................................................4-6
Figure 4-7: ChannelMaster TX7 Rear Panel (All Models)...............................................................................4-7
Figure 4-8: Power and RS-232 Connector Pin-Outs and Part Information.....................................................4-8
Figure 4-9: AC Line Cord Construction............................................................................................................4-8
Figure 4-10: RS232/RS485 Connector Pin-Outs.............................................................................................4-9
Figure 4-11: Firewire Input Connector (Optional) ............................................................................................4-9
Figure 4-12: Audio Cable Connections ..........................................................................................................4-10
Figure 4-13: XLR Breakout Cable ..................................................................................................................4-11
Figure 4-14: 3-PIN XLR Input Pin Assignments (2 Audio Inputs) .................................................................4-12
Figure 5-1: ChannelMaster TX7 Front Panel Controls and Indicators............................................................5-1

Revision 1.03
vii
DOCUMENT REVISION HISTORY
Date Revision Modified by Description
February 19, 2009 1.0 JB Initial version.
February 20, 2009 1.01 MH Edited Table 3-1 and Chapter 3.
March 10, 2009 1.02 JB Minor revisions.
April 1, 2009 1.03 JB Edited menu description, US Frequency Plan band range info in Ch 3. Added section on “COFDM Guide-
lines.”
Nucomm makes every effort to ensure our documentation is accurate, and as complete as
possible. In the event that you find any errors or omissions in our documentation, please
contact Nucomm Customer Service at [phone], or via email at
[e-mail].
Nucomm Publication: M01-0029-00A
© Copyrighted 2009, RF Extreme, Inc., Hackettstown, New Jersey 08740

Revision 1.03
viii ChannelMaster TX7 Transmitter

Revision 1.03
Description 1-1
1. PRODUCT
DESCRIPTION
1.1 Introduction
Nucomm’s ChannelMaster TX7 is a
Digital-Analog Portable Microwave
Transmitter. The tripod mounted Micro-
wave Transmitter System is designed to
operate in any specified band in the
1.00 GHz to 15.5 GHz frequency range.
Each unit is field programmable and
configurable to meet a wide range of
customer requirements. The TX7 may
be configured for dual band or tri-band
operation.
The ChannelMaster TX7 is designed to
be an extremely flexible system. It is
fully integrated with an MPEG2 compli-
ant super-low delay Encoder, a Multi-
mode Digital Modulator, and an Analog
FM modulator. Outputs include ASI and
microwave RF in the frequency bands
mentioned above.
The CMTX7 design uses advanced
software defined radio techniques and
supports both COFDM and VSB digital
modulation. As additional digital modula-
tion formats become available, the sys-
tem software can easily be updated to
support them.
The ChannelMaster TX7 includes inputs
for Composite Video, HD-SDI and SD-
SDI, ASI, Firewire, and 70 MHz modu-
lated signals.
The system comes standard with two
analog audio channels or one digital
AES channel. Optionally, the system
can support four analog audio channels
or two digital AES channels.
The system features an LCD display for
control and monitoring, an easy to use
menu driven user interface, fifteen user
defined presets, field programmable RF
and Audio Sub-carrier frequencies, ad-
justable RF power, and integrated dy-
namic color bars. A built-in serial inter-
face can be used for remote control and
monitoring. Special menus have been
included to ease the BAS (US) reloca-
tion process.
Available options include a high power
amplifier, multi-band operation, and
standby power sourcing. Contact Nu-
comm for information about additional
options.
This manual covers all configurations
and options for the series within the 1.00
GHz to 15.5 GHz frequency range.

Revision 1.03
1-2 ChannelMaster TX7 Transmitter
1.2 Model Numbering Scheme
Given the model number, a unit's configuration can be determined using the following:
AAAAA – CMTX7 – BB – CCC – YZ
Options
Specified Frequency Plan
Power Output
Model
Generalized Frequency Band Designator
Where:
AAAAA = mean frequency band center in GHz rounded to the closest GHz. This num-
ber is then multiplied by 10. For multiple bands, each center frequency designation is
separated by a backslash "/".
BB = Used to identify the power output, per the following Power Output Designators:
Power Output is represented by Letters for the analog power (as listed in the table be-
low), and Numbers (0-9) for the digital power. For example, a 5W Analog / 2W digital
system would be described with a power indicator of "E2". A Dual-Band system would
have two sets of power indicators, to show the power levels at both bands.
LETTER DESIGNATOR Analog Power (Watts)
A 1
B 2
C 3
E 5
J 10
L 12
Example: For A Dual Band 2 + 7 GHz radio with these power ratings:
2 GHz: 12 Watt Analog, 5 Watt Digital
7 GHz: 5 Watt Analog, 1.5 Watt Digital
AAAA/AAAA = 20/70, and
BB/BB = L5/E1.5

Revision 1.03
Description 1-3
Thus the above model number be similar to:
20/70-CMTX7-L5/E1.5-CCC-YZ
CCC = Nucomm assigns a frequency plan number for each unique frequency channel
combination. Contact your Nucomm representative for further information.
YZ = Miscellaneous options as listed in the table below. The model number is formed by
appending as many letter codes as appropriate.
LETTER CODE OPTION
AUDIO
A2 2 AUDIO
A4 4 AUDIO
B AES ENCRYPTION
X XLR AUDIO
MODULATION + VIDEO
C2 COFDM / FM
C4 COFDM / HD ENABLED
C8 COFDM / FM / HD ENABLED
C10 FM ONLY
C12 COFDM / FM / VSB / HD ENABLED
C15 COFDM / FM / VSB / HD READY
C17 COFDM / FM / HD READY
Options that are not a standard part of the system are indicated in this manual by
shaded text as shown here.

Revision 1.03
1-4 ChannelMaster TX7 Transmitter

Revision 1.03
Features 2-1
2. FEATURES
This chapter describes the features of the ChannelMaster in detail.
The CMTX7 supports an extensive range of popular digital video input formats, includ-
ing SDI, ASI, and optional Firewire (IEEE1394). The CMTX7 can also be used to trans-
mit 70MHz IF input signals containing audio and video that have been modulated by
other equipment.
Nucomm ChannelMaster TX7
2.1 Feature Overview
Nucomm’s ChannelMaster TX7 Series Digital-Analog Portable Microwave Transmitters
contain among the most comprehensive set of portable radio features available. The
ChannelMaster TX7 features are designed for both Digital transmission (either HD or
SD video) and Analog (standard definition only) in such applications as ENG/OB trucks,
portable links, helicopters, etc.

Revision 1.03
2-2 ChannelMaster TX7 Transmitter
Table 2-1: ChannelMaster TX7 Technical Features and Benefits
Technical Feature Benefit
HD and SD video microwave link Supports HD cameras and older NTSC and PAL cameras.
User friendly menu driven interface ase of Use.
Pushbutton controls Main controls conveniently available.
Preset settings buttons Simple re-use of system setup.
Advanced digital transmission options
(COFDM or VSB digital modulation) using
any system video input type.
High integrity digitally modulated signals and microwave
transmission.
ASI input – HD and SD MP G2 video
transport stream. Common on professional video equipment.
SDI input - HD and SD video transport
stream. Common on pro video cameras.
I 1394 Firewire Digital Video Input Common on pro video cameras.
Composite Video Input – SD (NTSC and
PAL) support for composite video. NTSC and PAL support.
Up to Four Analog Audio Inputs
Balanced audio signals.
High noise immunity over long distances.
CMTX7 with two XLR input option provides phantom
microphone power on right XLR connector.
Up to Two Digital Audio (A S) Inputs Supports Audio ngineers Society digital audio interface
specifications. High SNR using digital interface.
MP G2 Video ncoder
Composite and SDI inputs can be digitally encoded before
modulation and transmission. Also, the MP G2 encoder
can be used to produce an ASI output signal from Com-
ponent or SDI video input.
Three Modulation Modes: COFDM, VSB,
and Analog FM
Flexible options.
Digital Modulation methods offer quality and reliability.
Analog FM modulation is useful for legacy support.
COFDM Modulation
Digital modulation provides high signal path integrity
characteristics and resistance to transient issues such as RF
noise sources.
VSB Modulation VSB offers greater robustness than COFDM for larger
throughput applications in clear line of sight conditions.
Analog FM Modulation For use with Analog FM video receiving equipment.
SDI input to Composite Video and De-
embedded Audio For analog FM transmission of digital video.

Revision 1.03
Features 2-3
2.2 System Functional Block Diagram
The figure below shows a functional block diagram of the ChannelMaster CMTX7.
Figure 2-1: ChannelMaster TX7 Functional Block Diagram

Revision 1.03
2-4 ChannelMaster TX7 Transmitter
2.3 System Chassis Features
The ChannelMaster TX7 features a ro-
bust, weather-resistant housing design
to withstand rough handling in the field.
The ChannelMaster TX7 includes video
and audio processing boards, power
supply, 70 MHz modulator, power ampli-
fier, up-converter, and low noise fre-
quency synthesizer enclosed in a rug-
ged enclosure, with all input jacks and
user interface controls on the front
panel. The system chassis is typically
tripod mounted during use.
2.4 User Interface Overview
The user interface is conveniently lo-
cated on the front panel, and has three
elements:
1. A menu list for changing system
setup configuration options.
2. Preset buttons which can be
used to quickly change between
setup configurations.
3. Pushbuttons for operating com-
monly used controls (e.g. Digi-
tal/Analog and Transmit Mode).
2.5 Standby Mode
In the Standby mode, the ChannelMas-
ter TX7 is powered on, but the RF out-
put is muted, enabling the transmitter to
be tuned safely without radiating off-
frequency emissions. The ChannelMas-
ter TX7 will remain in Standby until on-
frequency lock has been obtained.
Switching from Standby to Normal mode
results in instantaneous on-frequency
transmission.
2.6 Video Signal Encoding
The CMTX7 features a built-in MPEG2
compliant digital encoder which trans-
forms Composite Video and SDI inputs
into the MPEG2 format. The ASI input
and optional Firewire are already in
MPEG2 format.
Optionally, the MPEG2 encoded signals
can be routed to an ASI output jack.
Signals from the MPEG2 encoder, the
ASI input, or the optional Firewire digital
video input can be digitally modulated
for transmission using the system’s
available digital modulation modes.
2.7 Audio Sub Carriers
Two (four optional) field programmable
synthesized audio sub-carriers feature
individual LINE, MIC, AES,
EMBEDDED, and TONE source selec-
tion (plus an OFF setting), and auto-
matic gain control (AGC). The sub-
carrier frequencies, Mode, and addi-
tional gain are front panel adjustable us-
ing the LCD interface. In the model with
optional XLR connectors, the right XLR
jack can be used as a microphone input
with or without 10 Volt phantom power.
2.8 Multi-Mode Modulator
The table below summarizes the modu-
lation types available.
Modulation
Mode Name Modulation Technique
1 COFDM Digital
2 Analog
FM Analog
3 VSB Digital

Revision 1.03
Features 2-5
2.9 Multi-band Microwave
Output
Nucomm’s ChannelMaster transmitters
are available in single, dual, and multi-
band models.
An antenna (supplied separately) can be
either mounted directly to the transmitter
using available mounting adapters or it
can be remotely mounted and con-
nected to the transmitter via standard
RF cables with N-Type connectors.
The Channel-
Master radios
provide full
coverage of the
2, 7, & 13 GHz
US frequency
bands and/or other bands as required
internationally, from 1 GHz to 15.5 GHz.
The US frequency bands are given in
Table 3-2 through Table 3-5. Band and
channel selections are made and clearly
displayed via the Front Panel LCD Inter-
face.
2.10 Signal Strength Indicators
Transmitted signal strength is indicated
on the LCD display by a digital readout
that indicates the transmitted signal
level directly in dBm. (The signal
strength display is intended as an ap-
proximate reading of power only.)
2.11 Video Presence Detector
The Video Presence Remote Standby
mode enables the camera to remotely
turn on the color bars or put the Chan-
nelMaster in standby based upon the
detection of video presence at the input
port.
2.12 Remote Control Feature
Two RS232/RS485 ports are available
to control the system remotely. One is
located on the left side of the unit’s
housing, and the other is located within
the front panel power supply connector.
2.13 Power Supply
All standard ChannelMaster's feature a
built-in power supply, which automatically
covers all the input voltage ranges listed
in Table 3-1, without requiring any user
intervention.
Optional Power configurations:
Standby Power: For power
redundancy, ChannelMaster's can be
configured to accept both AC AND DC
simultateneously. The unit will continue
to operate if at least one of the inputs is
present.
DC Only: The ChannelMaster may be
configured for "DC only" source voltage.
2.14 Internal Self-Test
Built-in diagnostic features include a 1
kHz audio test tone and a 761.5 kHz
(1.512 MHz for PAL) video deviation test
signal.
2.15 Other Standard Features
•Digitally synthesized microwave os-
cillator tuning
•Independent Gain Control for audio
inputs (Two audio sub-carriers stan-
dard, four optional)
•Selectable power levels
•Test Pattern/ID Test Generator with:
oSMPTE RS-170A Color Bars
(EBU Pattern)

Revision 1.03
2-6 ChannelMaster TX7 Transmitter
oA 16-character programmable ID
(can be placed in the Vertical In-
terval and Gen-locked to the in-
coming Video signal)
2.16 Options
•Dual front panel XLR connectors
with phantom power for mic inputs.
•Front panel Firewire connector for
SD or HD MPEG2 digital input
stream.
•High Power Amplifier enabling en-
hanced MER.
2.17 Accessories
ChannelMaster TX7 transmitters ship
with AC & DC power cords and manual.
2.18 Flexibility
With the addition of a modem, the
ChannelMaster can pass DS3/E3 or a
variety of other digital signals. The
ChannelMaster can accept PSK, QPSK,
8PSK, DVB-S, Multi-Level FSK,
16QAM, and COFDM signals directly
through the 70 MHz input connector with
no internal modifications.
Nucomm also offers a full line of remote
control systems, antennas, and antenna
mounting equipment that seamlessly
integrate with the ChannelMaster series.
See the Nucomm catalog for additional
information on the Nucomm website at:
www.nucomm.com.

Revision 1.03
Specifications and Frequency Plans 3-1
3. SPECIFICATIONS AND FREQUENCY PLANS
RF Performance:
Tuning step size: ..................................... 250 kHz (US), 100 kHz (International)
70 MHz input:........................................... –10 dBm to 0 dBm (75 Ω)
Frequency stability: ................................. ± 5 ppm (.0005%)
Power Output
Standby mode:................................... No RF output
Normal mode: .................................... Instant on frequency transmission
HI power = Full power (see Table 3-1)
LOW power = 6 dB drop (typical)
Table 3-1 lists band coverage, and maximum power levels for single band configurations.
NOTE: Dual and Tri-band configurations may not support the maximum power level.
Table 3-1: ChannelMaster TX7 Specifications
Base
Model Frequency (GHz)
Band
Designator
(AA*)
Power
Designator
(BB*)
Analog Power
(dBm) Digital Power (dBm)
L5 41 37
23CMTX7 1.9 - 2.5 23 L8 41 39
L5 41 37
25CMTX7 2.3 - 2.7 25 L8 41 39
nnCMTX7 2.7 - 6.4 Contact Nucomm for specific bands and power levels.
B1 33 30
70CMTX7 6.4 - 7.1 70 E1.5 37 32
B.5 33 27
75CMTX7 7.1 - 7.75 75 E1.5 37 32
B.5 33 27
82CMTX7 7.7 - 8.5 82 E1.5 37 32
nnCMTX7 8.5 -10.0 Contact Nucomm for specific bands and power levels.
110CMTX7 10.0 - 10.6 110 C.5 35 27
nnCMTX7 10.6 - 12.7 Contact Nucomm for specific bands and power levels.
130CMTX7 12.7 - 13.2 130 C.5 35 27
nnCMTX7 13.2 – 15.0 Contact Nucomm for specific bands and power levels.
* Refer to Section 1.2

Revision 1.03
3-2 ChannelMaster TX7 Transmitter
Modulation Modes
Modulation 1: .......................................... COFDM (DVB-T)
Carriers:............................................... 2K
Constellation:....................................... QPSK, 16QAM, 64QAM
Code Rate:........................................... 1/2, 2/3, 3/4, 5/6, 7/8
Guard Interval:..................................... 1/32, 1/16, 1/8, 1/4
Bandwidth:........................................... 6 MHz, 7 MHz, and 8 MHz
Modulation 2: ........................................... Analog FM
2 field tunable sub-carriers (optional 4)
Modulation Deviation (field selectable): 3 MHz/volt or 4 MHz/volt
Modulation 3 (Optional):........................... VSB
Constellation:....................................... 2VSB, 8VSB, 8TVSB (ATSC)
Bandwidth:........................................... 6 MHz
MPEG Encoder:
Video
SD Profile:............................................ MP@ML(4:2:0) 1-15MBPS
............................................................. 422@ML(4:2:2) 3-50MBPS
HD Profile:............................................ MP@HL
MP@H14L
GOP:.................................................... Front panel selectable, (I, IP, IBP, IBBP)
Latency: ............................................... Standard (GOP:1-5) ~250mS
Low Delay(GOP:0) ~90mS
Frame Size: ......................................... NTSC:720x480(4:2:0)/720x525(4:2:2)
PAL:720x576(4:2:0)/720x625(4:2:2)
720p(1280x720) 59.94,50,29.97,25,23.97Hz)
1080i(1920x1080) 29.97,25Hz
1080i(1440x1080) 29.97,25Hz
SDI input:............................................. ANSI/SMPTE 259M(SD), 292M(HD)
Audio
Audio Coding:...................................... ISO/IEC 11172-3(Layer II)
Audio Bit Rate:..................................... 128, 256kbps, 384kbps
Audio Sample Rate:............................. 48Khz
Audio Channels: .................................. 2 Standard (4 Optional)
Audio Input:.......................................... Line; Gain selectable (10dB), 600ΩBalanced
(18dBm = 0dBFS)
AES/EBU; 150ΩBalanced
DeEmbedded from SDI; (4 channels)
Tone; (-10dBfs/8dBm) Level Adjustable (-10 to
26dBfs)
Line/Mic; Input range: -4dB and 41dB
with selectable 10V Phantom Power
Frequency Response: ......................... 40Hz – 20KHz: ± 0.5dB
Audio THD:.......................................... 0.25% @ 1KHz, +8dBm
Signal-Noise: ....................................... >70dB