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ChannelMaster TX7.4 LITE HD/SD Portable Transmitter Integrated Encoder and Multi-Mode Modulator Features: n
Lightweight—ideal for portable or airborne applications
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HD/SD MPEG-2 and MPEG-4, Part-10/H.264 encoding
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Multiple modulation selectable; FM, COFDM, VSB, QAM, DVB-T
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Available in 2, 4, 7, 8 and 13 GHz bands
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Frequency agile via preset channels or in 250 kHz step sizes (100 kHz internationally)
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Remote control of all functions via RS-232/RS-485
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Dynamic color bars with field programmable ID
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Video inputs: composite video, SDI (HD), DVB-ASI, 70 MHz
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Audio inputs: two analog standard, four audio available; AES/EBU, de-embedded from SDI
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Integral SDI to composite video converter for FM operation
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Front panel LCD smart display for total control
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Five quick keys provide for easy operation and fast access to commonly used functions
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Fifteen quick-store presets allow quick access to user configurable parameters and setups
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Power outputs from 0.25 W to 8 W
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Integrated universal AC/DC power supply
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AES Encryption
The ChannelMaster LITE features all of the great qualities of the ChannelMaster in a lighter weight package, specifically mission oriented for helicopter and aerial applications. This product offers both MPEG-2 and MPEG-4 HD/SD encoding. This new two-box configuration results in greater than 40% weight reduction. The ChannelMaster LITE is available in single-band configurations, using frequency bands from 1.5-15.4 GHz. The ChannelMaster LITE encoder features adjustable long GOP encoding including I P and B frames improving video quality as well as a low delay mode. The encoder can be purchased as HD/SD or SD only. For increased flexibility a wide array of inputs are provided, including composite video/ audio, SDI (with de-embedded audio), ASI and 70 MHz. The ASI input is ideal for use with an external encoder or to support digital repeater applications. Two audio inputs are standard, while four audio inputs are available. For FM operation, an internal SDI to composite converter is integrated providing seamless operation between analog and digital modes. This eliminates the need for an external converter when used in an SDI plant. This feature also de-embeds the audios if desired. The ChannelMaster LITE features software generated modulation formats that are stored in circuit board PROMs (programmable read only memory). Available formats include — FM (NTSC/PAL), COFDM, VSB, DVB-S and single carrier QAM. As additional digital software formats become available, the PROMs can be easily updated. This feature increases the flexibility of the ChannelMaster LITE and helps avoid obsolescence. The ChannelMaster LITE is equipped with a front panel smart display, five quick keys, and 15 quick-store presets for quick set up and operator convenience.
ChannelMaster TX7.4 LITE HD/SD Portable Transmitter Integrated Encoder/Multi-Mode Modulator Smart Display
The ChannelMaster LITE offers optimum flexibility, is easy to use, and sets up fast in the field. The front panel smart display and internal microprocessor are used to control and monitor all functions and operating parameters including everything from modulation and channel selection to RF power levels and audio subcarrier programming. All parameters of the modulator and encoder are set via the smart display. When the modulator parameters are set the encoder is also automatically set.
Quick Keys
No need to wade deep into menus for that set up function that you need in a hurry. The front panel has five quick keys which provide quick access to commonly used functions such as input selection, modulation mode, audio functions, color bars and standby mode.
Quick-Store User Presets
To meet operator demands, 15 quick-store presets are provided for recall of predefined transmitter settings. The operator can instantly switch between pre-programmed modes of operation. This will be useful during the 2 GHz relocation, when migrating from old to new frequency plans and from analog to digital operation.
Dynamic Color Bars
The dynamic test pattern generator functions in both the analog and the digital modes. A programmable 16 character ID is included and contains alpha and numeric characters. The dynamic pattern offers several characters that are blinking. This is necessary for digital operation when the pattern must show some motion in order to verify the link.
High/low RF power levels are front panel switchable. The low power mode is typically 3 to 6 dB below the high power setting.
HDTV Transmission
The demand for high definition transmission from the field is increasing, and the ChannelMaster TX7.4 LITE is ready. The multiple modulation format capability of the ChannelMaster LITE offers the flexibility of transmitting in the robust COFDM format in non line of site multipath scenarios or single carrier formats for line of site ultra-high data rate scenarios. The integrated HD/ SD low latency encoder makes it easy for the operator as no additional equipment is necessary and all modes can be simply programmed into presets. The ChannelMaster LITE can be configured to operate using DVB-T compliant 6/7/8 MHz COFDM. COFDM offers a dramatic increase in data rates to accommodate high quality HD transmissions. Also available are VSB and QAM modulation modes that offer data rates of 30 Mbps and beyond. VSB modulation is superior to QAM, in that for a given bandwidth, higher data rates are achievable. Our HD solution is also comprised of a very powerful long GOP encoder using IPB frames to improve video quaility by 30% over traditional IP frame-only encoders. With an eye on the future, this HD encoder/ modulator is designed to be upgradeable as formats change in HD transmission. Typical selectable data rates are shown in Table One. Note that VSB provides multiple data rates up to 29 Mbps in a 6 MHz bandwidth. This is ideal for split channel operation. Table Two lists the data rates for COFDM with two typical code rates (FEC). In VSB mode, the RF output will be ~1dB higher for the same spectral regrowth performance. This will provide expanded coverage. For markets using split channel operation, VSB can accomodate 19 MBits in a 6 MHz channel while still meeting FCC mask — which can not be achieved with COFDM.
Inputs & Outputs
The transmitter offers separate connectors for ASI In, SDI In, 70 MHz In and Video In. All input and power connectors are located on the lower portion of the front panel. An RF type “N” connector is located on the rear of the unit. A “D” connector is located on the side of the unit for full RS-232/RS-485 remote control. RS232/RS-485 is also available on the front panel multi-pin connector.
Table One Available Data Rates with Various VSB Modulation Formats: Standard VSB Modulation
Data Rate
Bandwidth
(VSB)
(Mbps)
(MHz)
2 8 8T*
9.6 29.0 19.4
6.0 6.0 6.0
* Tr ellis Coded 8VSB (ATSC)
Table Two COFDM Transmission Maximum Data Rates at 8 MHz Bandwidth: Output Power
The 2 and 7 GHz ChannelMaster LITE are available with a 5 watt analog/1.5 watt digital amplifier or 12 watt analog/5 watt digital internal amplifier. The 13 GHz model is standard with a 3 watt analog/0.5 watt digital. The 4 GHz model is available with a 5 watt analog/1.5 watt digital amplifier.
Modulation
Code Rate
Data Rate (Mbps)
QPSK
1/2 7/8 1/2 7/8 1/2 7/8
6.03209 10.55615 12.06417 21.11230 18.09626 31.66845
16-QAM 64-QAM Guard Interval = 1/32
ChannelMaster TX7.4 LITE HD/SD Portable Transmitter Integrated Encoder/Multi-Mode Modulator System Configuration
The ChannelMaster LITE transmitter is very flexible and can be configured according to the individual customer’s needs. As a base unit the ChannelMaster LITE transmitter is supplied in a single band format in either 2 GHz, 7 GHz or 13 GHz and is configured for both AC and DC operation (low power models). The basic unit is supplied in a low power configuration for the band chosen and without modulators but with a 70 MHz input. The system is then built up by adding any or all of the following: n
Analog FM modulator, SD or SD/HD
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MPEG-2/MPEG-4/COFDM encoder modulator (4:2:2* and 4:2:0 switchable)
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Two audio channels standard (Four available)
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Choice of a third modulation format** — VSB, QAM, DVB-T
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Selection of internal high power amplifiers
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Dynamic color bar generator with ID
* SD only ** When available *** Frequency bands from 1.5 to 15.4 GHz available
SDI Converter Built-In
For systems that are fully designed for SDI, there’s no more need for expensive external SDI-Composite converters when Analog FM operation is used, because we’ve built a professional grade SDI-to-composite converter into our FM Modulator. Additionally, the embedded audio on the SDI can be de-embedded and applied to the audio subcarriers. This is especially handy when the camera you are using outputs everything on a single SDI.
ChannelMaster TX7.4 LITE HD/SD Portable Transmitter Integrated Encoder/Multi-Mode Modulator RF Performance:
Frequency Bands (Front panel selectable): Part Number Frequency* Analog (GHZ) Power (dBm) 23CMTX7.4L-L5 1.9 to 2.5 40.8 23CMTX7.4L-L8 1.9 to 2.5 40.8 23CMTX7.4L-E1.5 1.9 to 2.5 37 25CMTX7.4L-L5 2.3 to 2.7 40.8 2.3 to 2.7 40.8 25CMTX7.4L-L8 37 25CMTX7.4L-E1.5 2.3 to 2.7 25CMTX7.4L-E1.5 4.4 to 5.0 37 65CMTX7.4L-L5 6.4 to 6.6 40.8 70CMTX7.4L-E1.5 6.4 to 7.2 37 37 72CMTX7.4L-E1.5 6.7 to 7.4 75CMTX7.4L-E1.5 7.1 to 7.7 37 82CMTX7.4L-E1.5 7.7 to 8.5 37 100CMTX7.4L-C5 10 to 10.6 34.5 130CMTX7.4L-C5 12.7 to 13.2 34.5
Digital Power (dBm) 37 39 33 37 39 33 31.8 37 31.8 31.8 31.8 31.8 27 27
* Other plans available per user requirements. Contact sales ** Limited to comply with FCC (USA) regulations.
Tuning step size: 70 MHz input: Frequency stability:
250 kHz (US), 100 kHz (International) –10 dBm to 0 dBm (75 Ohms) ± 5ppm (.0005%)
Modulation Modes:
Modulation 1: Modulation Formats: Constellation: Code Rate: Guard Interval: Bandwidth: Modulation 2 Analog FM: Modulation Deviation: Modulation 3 (optional) Modulation Formats Constellation:
COFDM (DVB-T) QPSK, 16QAM, 64 QAM 1/2, 2/3, 3/4, 5/6, 7/8 1/32, 1/16, 1/8, 1/4 6 MHz, 7 MHz, and 8 MHz 2 field tunable sub-carriers (optional 4) 3 MHz/volt or 4 MHz/volt selectable VSB 2VSB, 8VSB, 8TVSB(ATSC)
Digital Modulation: Video:
Composite Input: HD/SD SDI Input SD: HD:
MPEG-2 Encoding SD Profile: HD Profile: Latency: MPEG-4 Encoding Method: Profile: Latency: Audio Audio Input:
75Ω, 1Vp-p, NTSC/PAL SMPTE 259M Level C 270 Mb/s 565/625 Component SMPTE 292M 1.485 Gb/s SMPTE 274M 1920x1080 SMPTE 296M 1280x720 MP@ML(4:2:0) 1-15MPBS 422@ML(4:2:2) 3-50MPBS MP@HL MP@H14L Low Delay(GOP:0) ~90 ms MPEG-4 Part 10/H.264 AVC Main Profile (4:2:0) Level 4.1 Low Delay ~120 ms Line, gain selectable (10 dB), 600 (18 dBm = 0dBFS) AES/EBU, 150Ωbalanced De-embedded from SDI
Frequency Response: Encoding: Sample Rate: Audio Channels: System Video Present: Test Generator(dynamic):
Encryption:
Mic (0 - +28 dB Gain, selectable phantom power) requires XLR connector option Tone (-10 dBfs/8 dBm) level adjustable (-10-26 dBfs) 40 Hz – 20 KHz: ± 0.5 dB ISO/IEC 11172-3 (Layer I/II) 48KHz 2 Stereo, 4 Mono (Selectable) Remote standby/test generator selectable SMPTE CB(NTSC)/100% CB(PAL) 16 Character ID (Match SDT Service name) 1 KHz Tone/Pulse Optional AES Block Cypher, supporting key size of 128 & 256 bits (FIPS PUB 197)
FM Modulation: Video Video: Composite input: SDI input:
Video Emphasis: Differential Phase: Differential Gain: Audio Audio Channels: Audio Input:
Frequency Response: Audio THD: Emphasis: System Remote Control:
525/625 lines NTSC/PAL field selectable 75Ω, 1Vp-p, NTSC/PAL ANSI/SMPTE 259M Level C 270 Mb/s, 525/625 Component NTSC/PAL/Bypass (CCIR 405) ± 1.0 degrees ± 1.0 % 2 tunable subcarriers (4.83 – 9 Mhz 10KHz steps) 4 optional Line, gain selectable (10 dB), 600Ω, AES/EBU, 150 balanced* De-embedded from SDI (4 channels)* *(0dBFS = +18 dBm) Tone 1 KHz @ +8 dBm adjustable 40 Hz – 10 KHz: ± 0.5 dB 40 Hz – 15 KHz: ± 1.0 dB 0. 5% @ 1 KHz, +8 dBm 50µs/75 µs (follows video) RS232/RS485 (2 wire)
Power Requirements: Input Range: AC: DC: Power Consumption:
85 to 264 VAC, 50/60 Hz +11 to +32 V 80 W typical (12 watt version)
Environmental:
Temperature Range: Full specification: Altitude: Operating: Physical Characteristics: Size: Weight: Control: Connectors: Video/SDI DVB-ASI/70MHz: Audio: RF Output: Remote Control Power
Nucomm reserves the right to make changes to specifications of products described in this datasheet at any time without notice and without obligation to notify. Versions of this device may not have been approved by the Federal Communications Commission. These versions are not offered for sale or lease until approval of the FCC has been obtained. 092_03_14
-30° to +60° C 20,000' (6,000 m) 4.89" x 7.5" x 12.0" (12.42 x 19.05 x 30.48 cm) 10 lbs (4.5 kg) Rotary knob/membrane Type BNC-F Military style with break out to XLR Optional XLR-3 native connector Type “N” female 9 Pin D, female Multi- Pin "MS" style
200 International Drive, Mt. Olive, NJ 07828 USA T. +1.908.852.3700 F. +1.908.813.0399 www.imt-broadcast.com
