I4U27VT1-12-10VT1 Transmitter

2 For the 6425 to 7125 MHz band, the range of operating power is between 1.5 to 12Watts, with two selectable power output levels called “Low” and “High” and two operational modes called “Digital” and “Analog.” The following table outlines the respective power levels. Mode Nominal Power (Watts) Minimum Power (Watts) Analog High Power 11.0 9.0 Analog Low Power 2.0 1.5 Digital High Power 4.0 3.0 Digital Low Power 1.0 0.75 The maximum power rating of 12 Watts is requested for service in Part 74, Subpart F, Television Auxiliary Broadcast Stations, Section 74.636 under the heading Power Limitations. 16. DC Voltages applied to and DC currents into the final RF stages of the transmitter: The maximum DC voltage and DC currents into the last two stages of the driver and final amplifier for the maximum output are outlined in the following table. For both the Digital and Analog modes of operation the bias conditions on the amplifier are identical therefore only “High” and “Low” power conditions are shown. 1990 MHz to 2550 MHz Mode Driver Stages Final Stage High Power +10V@ 0.72A +10V@ 4.0A Low Power +5V @ 0.45A +5V @ 1.3A 6425 MHz to 7125 MHz Mode Driver Stages Final Stage High Power +10V@ 0.72A +10V@ 4.0A Low Power +5V @ 0.45A +5V @ 1.3A 17. Transmitter Tune Up procedure. The 2/7NCVT1-LE06-1A2FK requires no tune-up over its operating range.

Y008A500.sch-1 - Fri Apr 25 13:29:30 2003

Applicant: Nucomm, Inc. FCC ID: I4U2713MMPT3-12-1 Retlif Testing Laboratories Report No.: R-9761 GENERAL INFORMATION REQUIREMENTS Paragraph 2.983(a) Name of Applicant: Nucomm, Inc. Address of Applicant: 101 Bilby Road Hackettstown, NJ 07840 Name of Manufacturer: Nucomm, Inc. Paragraph 2.983(b) Equipment Identification: FCC ID: I4U2713MMPT3-12-1 Applicant: Nucomm, Inc. FCC ID: I4U2713MMPT3-12-1 Retlif Testing Laboratories Report No.: R-9761 Para. 2.1051 Spurious Emissions at Antenna Terminals Applicant: Nucomm, Inc. FCC ID: I4U2713MMPT3-12-1 Retlif Testing Laboratories Report No.: R-9761 Spurious Emissions at Antenna Terminals (Para. 2.1051) A. Measurement Procedure: The RF output of the transmitter was directly coupled through attenuators to the input of a spectrum analyzer. With the transmitter on, the spectrum analyzer was swept from 30 MHz to 18 GHz. (Emissions above 18 GHz were measured during spurious case radiated emissions due to limitations in this set-up. i.e.: RG223 cable only rated to 18 GHz). It was verified that all emissions not associated with the fundamental transmission were at least 43 +10 log (P) down from the fundamental transmit power level (P). Setup of the test is shown below: B. Test Results: The results for the above test are submitted as a separate attachment named AntCe.pdf. Spectrum Analyzer Test Sample Attenuator RF Output Applicant: Nucomm, Inc. FCC ID: I4U2713MMPT3-12-1 Retlif Testing Laboratories Report No.: R-9761 Para. 2.1053 FIELD STRENGTH of SPURIOUS EMISSIONS, EFFECTIVE RADIATED POWER Applicant: Nucomm, Inc. FCC ID: I4U2713MMPT3-12-1 Retlif Testing Laboratories Report No.: R-9761 FIELD STRENGTH of SPURIOUS EMISSIONS, EFFECTIVE RADIATED POWER (Para. 2.1053) A. Measurement Procedure: The spurious emissions of the transmitter from 10 kHz to 40 GHz were measured in accordance with TIA/EIA603, Paragraph 2.2.1.2 as described below: The transmitter under test was placed on an 80-cm high non-metallic table on the Open Air Test Site with its antenna terminated into a shielded load. A receive antenna was placed three meters away from the transmitter. The turntable was rotated 360 degrees and the receive antenna was raised and lowered from 1 to 4 meters until a maximum reading was obtained at each spurious emission detected. This reading was recorded. The transmitter under test was replaced with a dipole (or equivalent antenna) and signal generator. The signal generator was set to the frequency for the spurious emission. The level of the signal generator was increased until the level was equal to that previously measured. The required input level from the signal generator in dBm was recorded and the antenna gain (in dB) of the transmit antenna was added. This was the Effective Radiated Power of the spurious emission. Setup of the test is shown below: A. Test Results: The results for the above test are submitted as a separated attachment named Respur1.pdf, Respur2.pdf and Respur3.pdf. Spectrum Analyzer Test Sample 3M 4M Broadband Antenna Pre Amplifier Applicant: Nucomm, Inc. FCC ID: I4U2713MMPT3-12-1 Retlif Testing Laboratories Report No.: R-9761 EQUIPMENT LISTS Antenna Conducted Emissions, 30 MHz to 18 GHz EN Type Manufacturer Description Model No. Cal Date Due Date 068 Attenuator Weinschel DC - 18 GHz 48-30-43 4/11/02 4/11/03 572 10db attenuator Pasternack DC - 18GHz PE7019-10 8/23/02 8/23/03 589A 3 dB Attenuator JFW Inc. DC - 1 GHz, 200W 50FH-003-200 7/22/02 7/22/03 712 EMI Test Receiver Rohde & Schwarz 20 Hz - 26.5 GHz ESI26 9/20/02 9/20/03 Spurious Radiated Emissions, 18 GHz to 75 GHz EN Type Manufacturer Description Model No. Cal Date Due Date 068 Attenuator Weinschel DC - 18 GHz 48-30-43 4/11/02 4/11/03 129E High Gain Horn Antenna Microlab/FXR 18 GHz - 26.5 GHz K638A 9/11/02 9/11/03 129G High Gain Horn Antenna Microlab/FXR 26.5 GHz - 40 GHz U638A 9/11/02 9/11/03 141 Spectrum Analyzer Hewlett Packard 100 Hz - 40 GHz 8566B 1/23/03 7/23/03 141A Graphics Plotter Hewlett Packard N/A 7470A 3/5/03 3/5/04 141B Quasi-Peak Adaptor Hewlett Packard 100 Hz - 1 GHz 85650A 1/23/03 7/23/03 420 Amplifier Hewlett Packard 2.0 GHz - 18 GHz 11975A 9/9/02 9/9/03 421 Harmonic Mixer Hewlett Packard 18 GHz - 26.5 GHz 11970K 9/29/00 9/29/03 421A Harmonic Mixer Hewlett Packard 26.5 GHz - 40 GHz 11970A 9/29/00 9/29/03 421B Harmonic Mixer Hewlett Packard 40 GHz - 60 GHz 11970U 9/29/00 9/29/03 421C Harmonic Mixer Hewlett Packard 50 GHz - 75 GHz 11970V 9/29/00 9/29/03 572 10db attenuator Pasternack DC - 18GHz PE7019-10 8/23/02 8/23/03 TIA/EIA-603-1992 Section 2.2.12 Radiated Spurious Emissions (30MHz - 18GHz) EN Type Manufacturer Description Model No. Cal Date Due Date 067 Open Area Test Site Retlif 3 Meter RNY 09/20/2000 09/20/2003 068 Attenuator Weinschel DC - 18 GHz 48-30-43 04/11/2002 04/11/2003 128 Double Ridged Guide Electro-Mechanics 1 GHz - 18 GHz 3105 06/07/2002 06/07/2003 129D High Gain Horn Antenna Microlab/FXR 12.4 GHz - 18 GHz Y638A 09/25/2002 09/25/2003 133 Broadband Pre-Amplifier Electro-Metrics 10 kHz - 1 GHz, 26dB BPA-1000 06/11/2002 06/11/2003 141 Spectrum Analyzer Hewlett Packard 100 Hz - 40 GHz 8566B 01/23/2003 07/23/2003 141A Graphics Plotter Hewlett Packard N/A 7470A 03/05/2003 03/05/2004 141B Quasi-Peak Adaptor Hewlett Packard 100 Hz - 1 GHz 85650A 01/23/2003 07/23/2003 151 Wide Range Oscillator Hewlett Packard 5 Hz - 600 kHz 200CDR 01/13/2003 01/13/2004 206B 6.0 dB Attenuator Texscan 0 - 1.0 GHz FP-50 - 6 dB 06/11/2002 06/11/2003 451C Tuned Dipole Antenna Empire Devices 400 - 1000 MHz DM-105-T3 08/08/2000 08/08/2003 543 Preamplifier Hewlett Packard 1.0 GHz - 26.5 GHz 8449B 07/11/2002 07/11/2003 572 10db attenuator Pasternack DC - 18GHz PE7019-10 08/23/2002 08/23/2003 654 Attenuator Weinschel AF117A-69-11 03/13/2002 03/13/2003 711 Microwave Sweeper Gigatronics 500 MHz - 20 GHz GT9000S/.5-20 10/17/2002 10/17/2003 762 AM/FM Signal Generator Marconi Instru. 10 kHz - 1.2 GHz 2023 07/29/2002 07/29/2003 767 Biconilog EMCO 26 - 2000 MHz 3142B 09/03/2002 09/03/2003 Applic…

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1 8) See the enclosed manual for operational detail. There is no external grounding requirements other than the earth ground center prong of the AC cord. 9) Basebasd Processor 70MHZ FM Modulator IFLO Synthesizer 1569-1570 Mixer AGC 1500MHz BPF Mixer 1990-2540MHz BPF RFLO Synthesizer 3490-4313MHz Mixer 6425-7125MHz BPF BPF 7925-8625MHz X2 LPF LPF 70MHz Switch External 70MHz BNC Video Audio COAX RF Switch AGC AGC PA PA Omni Directional RF Switch Omni Directional Control Unit RF unit 48VDC+10.7MHz OOK Communication+ 70MHz IF 15. Type of Emission, Frequency range of operation, Output power range and maximum output power: For the 1990 to 2550 MHz band, the range of operating power is between 1.5 to 12Watts, with two selectable power output levels called “Low” and “High” and two operational modes called “Digital” and “Analog.” The following table outlines the respective power levels. Mode Nominal Power (Watts) Minimum Power (Watts) Analog High Power 11.0 10.0 Analog Low Power 2.0 1.5 Digital High Power 4.0 3.0 Digital Low Power 1.0 0.75 2 For the 6425 to 7125 MHz band, the range of operating power is between 1.5 to 12Watts, with two selectable power output levels called “Low” and “High” and two operational modes called “Digital” and “Analog.” The following table outlines the respective power levels. Mode Nominal Power (Watts) Minimum Power (Watts) Analog High Power 11.0 9.0 Analog Low Power 2.0 1.5 Digital High Power 4.0 3.0 Digital Low Power 1.0 0.75 The maximum power rating of 12 Watts is requested for service in Part 74, Subpart F, Television Auxiliary Broadcast Stations, Section 74.636 under the heading Power Limitations. 16. DC Voltages applied to and DC currents into the final RF stages of the transmitter: The maximum DC voltage and DC currents into the last two stages of the driver and final amplifier for the maximum output are outlined in the following table. For both the Digital and Analog modes of operation the bias conditions on the amplifier are identical therefore only “High” and “Low” power conditions are shown. 1990 MHz to 2550 MHz Mode Driver Stages Final Stage High Power +10V@ 0.72A +10V@ 4.0A Low Power +5V @ 0.45A +5V @ 1.3A 6425 MHz to 7125 MHz Mode Driver Stages Final Stage High Power +10V@ 0.72A +10V@ 4.0A Low Power +5V @ 0.45A +5V @ 1.3A 17. Transmitter Tune Up procedure. The 2/7NCVT1-LE06-1A2FK requires no tune-up over its operating range. 3 18) A description of circuits for determining and stabilizing frequency. The following describes the operating principles of the various oscillator circuits employed in the 2/7NCVT1-LE06-1A2FK transmitter. Techniques used to stabilize the transmitter output frequency are also discussed. System Architecture: The 2/7NCVT1-LE06-1A2FK transmitter is a dual conversion transmitter. This is that the transmitter up converts a first IF frequency of 70MHz to 1500 MHz then a second up-conversion process is preformed to up-convert 1500MHz to the final RF output frequency. The transmitter has an internal 70MHz FM modulator but also has provisions to accept an external 70MHz. Basebasd Processor 70MHZ FM Modulator IFLO Synthesizer 1569-1570 Mixer AGC 1500MHz BPF Mixer 1990-2540MHz BPF RFLO Synthesizer 3490-4313MHz Mixer 6425-7125MHz BPF BPF 7925-8625MHz X2 LPF LPF 70MHz Switch External 70MHz BNC Video Audio COAX RF Switch AGC AGC PA PA Omni Directional RF Switch Omni Directional Control Unit RF unit Common PLL principles used on all the PLL’s: All the oscillators use a Phase Lock Loop to maintain their frequency. A sample of the oscillator output is divided down to a low reference frequency and compared to a crystal-controlled reference frequency inside the PLL IC. The PLL thus supplies an AFC voltage to the VCO assembly correcting any frequency error and holding the VCO on the selected frequency. In the event that the Phase-Locking process cannot be maintained, an alarm output from the PLL is sent to a local microprocessor that places the transmitter into “Standby” by shutting down all the voltages feeding the power amplifier preventing the radio from radiating. In this condition, a visual alarm appears on the front panel. Internal 70MHz FM Modulator The 70MHZ FM Modulator consists of a 70MHz voltage-controlled oscillator (VCO) and a narrow loop PLL. The principle and alarm monitoring are the same as outline above. The FM modulator accepts a composite baseband signal from the baseband processor, where video signal is processed and the audio subcarriers are generated and combined with the video. This composite baseband signal frequency-modulates the VCO circuit, which is controlled by an error signal from the PLL. 4 Audio Subcarriers Each audio signal is connected through a deviation adjustment potentiometer to one of the subcarrier generators, each of which consists of a PLL and VCO. The subcarrier synthesizers are each capable of operating from 4.83 to 8.3 MHz in 5KHz steps. The frequency of each is set through a menu on the front panel control. Each subcarrier VCO is directly modulated by the audio signal. The Subcarrier Deviation is normally set to 75KHz peak, however, other deviations are possible. The output of each Subcarrier is buffered and summed with the video signal before it is applied to the70MHz modulator. Subcarrier injection levels are normally set to -26 dBc, related to the 70MHz signal. Additionally, when the Audio Mode is switched to “Off”, the corresponding subcarrier is turned off. Circuitry used to suppress spurious radiation: Circuitry used to suppress spurious out of band radiation is built into the final RF amplifier. Each amplifier, 2/2.5 GHz and 6/7GHz, contains a low-pass filter (LPF) following the final amplifier transistor prior to the output connector. This LPF is used to suppress any harmonic emissions above the band of interest. In the first up-conversion process there is a 30MHz wide band pass filter at 1500MHz to eliminate the local oscillator image. This filter also functions to limit any unwanted or output of ba…

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2/7/VT1-12-10 Transmitter Demodulated Output, 2.1015 GHz Linearity Signal Figure 18 2/7/VT1-12-10 Transmitter Demodulated Output, 2.1015 GHz Linearity Signal Differential Gain Measurement on Tektronix VM 700A Measurement Test Set Figure 19 2/7/VT1-12-10 Transmitter Demodulated Output, 2.1015 GHz Multiburst Signal Figure 20 2/7/VT1-12-10 Transmitter Demodulated Output, 2.1015 GHz Audio (400Hz/ +18 dBm. 6.2 KHz @ -26 dBc, 150 KHz p-p) Video Modulation Multiburst Figure 21 2/7/VT1-12-10 Transmitter Demodulated Output, 2.1015 GHz Audio (400Hz/ +18 dBm. 6.2 KHz @ -26 dBc, 150 KHz p-p) Video Modulation Multiburst Figure 22 /7/VT1-12-10 Transmitter Demodulated Output, 7.1125 GHz inearity Signal Figure 23 2 L 2/7/VT1-12-10 Transmitter Demodulated Output, 7.1125 GHz Linearity Signal Differential Gain Measurement on Tektronix VM 700A Measurement Test Set Figure 24 2/7/VT1-12-10 Transmitter Demodulated Output, 2.1015 GHz Multiburst Signal Figure 25 2/7/VT1-12-10 Transmitter Demodulated Output, 7.1125 GHz Audio (400Hz/ +18 dBm. 6.2 KHz @ -26 dBc, 150 KHz p-p) Video Modulation Multiburst Figure 26 2/7/VT1-12-10 Transmitter Demodulated Output, 7.1125 GHz Audio (400Hz/ +18 dBm. 6.2 KHz @ -26 dBc, 150 KHz p-p) Video Modulation Multiburst Figure 27

Plots illustrating Occupied Bandwidth COFDM Band 1 (1999-2550 MHz): Occupied Bandwidth Figure 1 Occupied Bandwidth Figure 2 Occupied Bandwidth Figure 4 Occupied Bandwidth Figure 5 COFDM Band2 (6145-7125 MHz): Figure 6 Figu re 7 Figure 8 Figure 9 FM Band 1 (1999-2550 MHz): Figure 10 Occupied Bandwidth Figure 11 Occupied Bandwidth FM Band 2 (6145-7125 MHz) Occupied Bandwidth Figure 14 Occupied Bandwidth Figure 17