OUSLLV20AT20-Watt VHF Low Band Transmitter

Instruction Manual Innovator ® LX Series Analog VHF Low Band Transmitter AXCERA 103 FREEDOM DRIVE • P.O. BOX 525 • LAWRENCE, PA 15055-0525 USA (724) 873-8100 • FAX (724) 873-8105 www.axcera.com • [email protected] Innovator ® LX Series Analog VHF Transmitter Table of Contents LX Series, Rev. 0 i August 2, 2006 TABLE OF CONTENTS CHAPTER 1 INTRODUCTION SECTION PAGE 1.1 Manual Overview...................................................................................1-1 1.2 Assembly Designators............................................................................1-1 1.3 Safety..................................................................................................1-2 1.4 Contact Information...............................................................................1-2 1.5 Material Return Procedure......................................................................1-2 1.6 Limited One-Year Warranty for Axcera Products........................................1-3 CHAPTER 2 SYSTEM DESCRIPTION AND REMOTE CONTROL CONNECTIONS 2.0 System Overview..................................................................................2-1 2.1 Exciter/Amplifier Chassis Assembly.........................................................2-1 2.1.1 Modulator Module.........................................................................2-2 2.1.2 IF Processor Module.....................................................................2-3 2.1.3 Upconverter Module......................................................................2-4 2.1.4 Control & Monitoring/Power Supply Module.....................................2-6 2.1.5 VHF Power Amplifier Module..........................................................2-7 2.1.5 VHF Power Amplifier Module..........................................................2-7 2.1.6 RF Output....................................................................................2-8 2.2 Control and Status.................................................................................2-8 2.2.1 Front Panel LCD Display Screens....................................................2-8 2.3 System Operation..................................................................................2-8 2.3.1 Principles of Operation..................................................................2-9 2.4 Maintenance.......................................................................................2-10 2.5 Customer Remote Connections.............................................................2-11 CHAPTER 3 SITE CONSIDERATIONS, INSTALLATION AND SETUP PROCEDURES 3.1 Site Considerations................................................................................3-1 3.2 Unpacking & Installing the Transmitter....................................................3-4 3.2.1 AC Input.....................................................................................3-5 3.3 Setup and Operation..............................................................................3-5 3.3.1 Input Connections........................................................................3-5 3.4 Initial Turn On.......................................................................................3-6 3.4.1 Exciter/Driver Front Panel LED Indicators........................................3-6 3.4.1.1 Modulator Module LEDs on Front Panel..................................3-6 3.4.1.2 IF Processor Module LEDs on Front Panel...............................3-7 3.4.1.3 Upconverter Module LEDs on Front Panel...............................3-7 3.4.1.4 Controller Module LEDs on Front Panel..................................3-7 3.4.1.5 Power Amplifier Module LEDs on Front Panel..........................3-7 3.4.2 Front Panel Screens for the Exciter/Amplifier Chassis Assembly.........3-7 3.4.3 Operation Procedure...................................................................3-15 CHAPTER 4 CIRCUIT DESCRIPTIONS 4.0 Exciter/Driver Chassis Assembly.............................................................4-1 4.1 Modulator Module..................................................................................4-1 4.1.1 Analog Modulator Board................................................................4-1 4.1.1.1 Mono, Balanced Audio Input.................................................4-1 4.1.1.2 Stereo, Composite Audio Input.............................................4-1 Innovator ® LX Series Analog VHF Transmitter Table of Contents LX Series, Rev. 0 ii August 2, 2006 TABLE OF CONTENTS (continued) SECTION PAGE 4.1.1.3 SAP/PRO, Subcarrier Audio Input..........................................4-2 4.1.1.4 Audio Modulation of the 4.5 MHz VCO ..................................4-2 4.1.1.5 Phase Lock Loop (PLL) Circuit...............................................4-2 4.1.1.6 Main Video Signal Path (Part 1 of 2)......................................4-3 4.1.1.7 Delay Equalizer Circuits.......................................................4-3 4.1.1.8 Sync Tip Clamp Circuit.........................................................4-4 4.1.1.9 Main Video Signal Path (Part 2 of 2)......................................4-5 4.1.1.10 45.75 MHz Oven Oscillator Circuit.......................................4-5 4.1.1.11 Visual Modulator Circuit.....................................................4-6 4.1.1.12 Aural Modulator Circuit......................................................4-6 4.1.1.13 Visual IF loop thru path......................................................4-6 4.1.1.14 Voltage Requirements........................................................4-7 4.2 IF Processor Module...............................................................................4-7 4.2.1 IF Processor Board.......................................................................4-7 4.2.1.1 Modulator Selected..............................................................4-7 4.2.1.2 External Modulated IF Selected.............................................4-7 4.2.1.3 Main …

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Axcera-LLV20AT FCC Type Acceptance Report External Photos September 2007 2-1 2. EXTERNAL PHOTOS 2.1 Front view, complete Axcera LLV20AT Transmitter 2.2 Rear view, complete Axcera LLV20AT Transmitter with FCC ID Label and Manufacturer’s Label Axcera-LLV20AT FCC Type Acceptance Report External Photos September 2007 2-2 2.3 Top view, Output Bandpass Filter Assembly

Axcera-LLV20AT FCC Type Acceptance Report ID Label/Location Info September 2007 1-1 1. ID LABEL/LOCATION INFO 1.1 Rear Panel FCC Label 1.2 Rear Panel Manufacturer’s Label Axcera-LLV20AT FCC Type Acceptance Report ID Label/Location Info September 2007 1-2 1.3 Rear view, complete Axcera LLV20AT Transmitter with FCC ID Label and Manufacturer’s Label

Axcera-LLV20AT FCC Type Acceptance Report Internal Photos September 2007 6-1 6. INTERNAL PHOTOS 6.1 Front view - Chassis Assembly, Exciter 6.2 Side view - Modulator Assembly Axcera-LLV20AT FCC Type Acceptance Report Internal Photos September 2007 6-2 6.3 Side view - IF Processor Assembly 6.4 Side view – VHF/UHF Upconverter Assembly Axcera-LLV20AT FCC Type Acceptance Report Internal Photos September 2007 6-3 6.5 Side view - Control / Power Supply Assembly 6.6 Side view - Power Amplifier Assembly

Axcera-LLV20AT FCC Type Acceptance Report Operational Description September 2007 8-1 8. OPERATIONAL DESCRIPTION - MODEL Axcera-LLV20AT 8.1 General Description The LLV20AT is a complete 20-watt VHF low-band solid-state, internally diplexed television transmitter. It operates at a nominal visual output power of 20 watts peak sync and an average aural output power of 2 watts, at an A/V ratio of 10 dB, 10% sound. 8.2 Technical Specifications Type of Emissions: Visual .......................................................................... 5M75C3F Aural ............................................................................250KF3E Frequency Range.......................... 54 MHz to 88 MHz (any 6-MHz channel) Output Power Visual ............................................................ 20 watts peak sync Aural ..................................................................2 watts average Maximum Power Rating Visual .......................................................... 20 watts peak visual Aural ..........................................................2 watts average aural Power Consumption ................................................................ 300 watts 8.3 Performance Specifications Visual Performance Operating Frequency Range ..........................................54 MHz to 88 MHz RF output - Nominal: Power ............................................................ 20 watts peak sync Impedance .................................................................... 50 ohms Connector ....................................................................... Type N Visual Sideband Response: -1.25 MHz and below ........................................................... -20B -0.75 to -0.5 MHz..................................................... +0.5, -2.0dB -0.5 MHz to +3.58 MHz....................................................±0.5 dB 3.58 MHz to 4.18 MHz.............................................. +0.5, -1.0 dB Variation of Frequency Response with Brightness...........................±0.5 dB Differential Phase ............................................................................ ±3° Incidental Phase Modulation.............................................................. ±3° Differential Gain .............................................................................. 5% Low Frequency Linearity ................................................................... 5% Intermodulation Products .............................................. -52 dB (red field) Output Variation (Over 1 Frame) ....................................................... 2% Regulation of Output........................................................................ 3% Axcera-LLV20AT FCC Type Acceptance Report Operational Description September 2007 8-2 Signal-to-Noise Ratio ................................................................. 55 dB 2t K-Factor.................................................................................. 2% Harmonic Radiation .....................................................................-60 dB Spurious (>3 MHz from channel edge) ...........................................-50 dB Carrier Frequency Stability....................................................... ±1000 Hz Aural Performance Frequency Deviation Capability (Transmitters) ............................. ±75 kHz Distortion .....................................................................................0.5% FM Noise ....................................................................................-60 dB AM Noise ....................................................................................-55 dB Visual to Aural Separation ......................................... 4.5 MHz, ±100 Hz Composite Audio Input (Multi-channel sound - Transmitters) Input Level ........................................................1V peak, nominal Input Impedance.......................................... 75 ohms, unbalanced Frequency Range: ±0.1 dB Response.................................................50 Hz to 50 kHz ±0.5 dB Response ............................................30 Hz to 120 kHz Monaural Audio Input (Transmitters): Input Level ............................................................ 0 to +10 dBm Input Impedance............................................ 600 ohms, balanced Frequency Range (±0.5 dB resp.) ..........................30 Hz to 15 kHz Pre-emphasis..................................................................... 75 uS Subcarrier Audio Input (Transmitters): Input Level ........................................................1V peak, nominal Input Impedance.......................................... 75 ohms, unbalanced Frequency Range (±0.5 dB resp.) ...................... 20 kHz to 120 kHz Electrical Requirements Power Line Voltage .............................................117/230 volts, 50/60 Hz Power Consumption ................................................................ 300 watts Environmental Maximum Altitude ..................................................................8,500 feet Operational Temperature Range ...........................................0°C to +50°C Mechanical Dimensions: Width ..........................................................................19 inches Depth ..........................................................................23 inches Height....................................................................... 8.75 inches Weight ..............................................................................45 lbs Axcera-LLV20AT FCC Type Acceptance Report Operational Description September 2007 8-3 8.4. System Overview The LLV20AT is made up of the trays listed in Table 8-1. Table 8-1. LLV20AT Major Trays and Assemblies ASSEMBLY DESIGNATOR TRAY/ASSEMBLY NAME Exciter Driver Chassis Assembly, LX Series A11 Backplane Board, Axciter A2 Modulator Module A3 IF Processor Module A5 VHF/UHF Upconverter Module A4 Control/Power Supply Modul…

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Axcera-LLV20AT FCC Type Acceptance Report Parts List/Tune-up Info September 2007 7-1 7. PARTS LIST/TUNE-UP INFO 7.1 Parts List The transmitter, can be subdivided as follows: Transmitter Tray: ƒ Modulator Module ƒ IF Processor Module ƒ L.O. / Upconverter Module ƒ Control & Monitoring / Power Supply Module ƒ Power Amplifier Module 7.2 Tune-up Information The LLV20AT transmitter was aligned at the factory and should not require additional alignments to achieve normal operation. 7.2.1 Transmitter Chassis Assembly This transmitter takes the baseband audio and video inputs or, if the (Optional) 4.5-MHz composite input kit is purchased, either a single composite video + 4.5-MHz input or separate baseband video and audio inputs, and converts them to the desired VHF On Channel RF Output at the systems output power level. 7.2.2 Modulator Module Assembly Note: Not present in Translator systems. The Modulator Assembly has adjustments for video levels and audio modulation levels, and other related parameters. Connect an NTSC base-band video test signal input (1 Vpk-pk) to the transmitter video input jack J7 on the rear of the tray. Jacks J7 and J17 are loop-through connected; the J17 jack can be used as a video source for another transmitter. Connect a base-band audio input (+10 dBm) to the balanced audio input terminal block TB02-1 [+], TB02-2 [-], and TB02-3 [ground] or, if stereo/composite audio is provided, connect it to BNC jack J3, the composite audio input jack. Verify that all LEDs located on the front panel of the Modulator are Green. The following details the meaning of each LED: AURAL UNLOCK (DS5) – Red Indicates that 4.5 MHz Aural IF is unlocked from the 45.75 MHz visual IF. VISUAL UNLOCK (DS6) – Red Indicates that the 45.75 MHz visual IF is unlocked from the 10 MHz reference. AUDIO OVER DEVIATION (DS4) – Red Indicates that the input Audio level is too high. VIDEO LOSS (DS1) – Red Indicates that the input Video level is too low. OVER MODULATION (DS3) – Red Indicates that the input Video level is too high. Axcera-LLV20AT FCC Type Acceptance Report Parts List/Tune-up Info September 2007 7-2 ALTERNATE IF (DS7) – Red Indicates that an external 45.75 MHz IF is not present to the modulator. 10 MHz PRESENT (DS2) – Red Indicates that an external 10 MHz reference in not present to the modulator. Look at the front panel LCD meter on the Control/Power Supply Module Assembly. Set the LCD screen to the Modulator Details video output level screen, the screen indicates active video from 0 to 1 Vpk-pk. The normal video input level is 1 Vpk-pk on the front panel screen. If this reading is not at the proper level, the overall video level can be changed by adjusting the VIDEO LEVEL control R42 on the front panel of the Modulator to the 1 Vpk- pk level on the front panel screen. Switch the LCD display to the Modulator Details screen that indicates the AUDIO DEVIATION (modulation level) of the signal from 0 to 100 kHz. MONO SET UP: The modulator was factory set for a ±25-kHz deviation with a mono, balanced, audio input of +10 dBm. If the reading is not at the correct level, adjust the MONO Audio Gain pot R110, located on the front panel of the modulator, as necessary, to attain the ±25-kHz deviation on the front panel screen. STEREO SET UP: The modulator was factory set for a ±75-kHz deviation with a stereo, composite, audio input of 1 Vpk-pk. If this reading is not correct, adjust the STEREO Audio Gain pot R132, located on the front panel of the modulator, as necessary, for the ±75-kHz deviation. SECONDARY AUDIO SET UP: NOTE: Remove any stereo or mono audio modulation input to the transmitter during the set up of the secondary audio. The modulator was factory set for a ±15-kHz deviation with a secondary audio input of 1 Vpk-pk. If this reading is not correct, adjust the SAP/PRO Audio Gain pot R150, located on the front panel of the modulator, as necessary, for the ±15-kHz deviation. 7.2.3 If Processor Module Assembly Verify that all red LEDs located on the IF Processor front panel are extinguished. The following details the meaning of each LED when illuminated: • DS1 (input fault) – Indicates that either abnormally low or no visual IF is present at the input of the IF Processor module. • DS2 (ALC fault) – Indicates that the ALC circuit is unable to maintain the signal level requested by the ALC reference. This is normally due to excessive attenuation in the linearity signal path or the IF phase corrector signal path, or that switch SW1 is in the Manual ALC Gain position. • DS4 (Mute) – Indicates that a Mute command is present to the system. Switch the transmitter to Standby. The ALC is muted when the transmitter is in Standby. Switch the transmitter to Operate. Verify that all LEDs located on the front panel of the visual Upconverter are Green. The following details the meaning of each LED: PLL 1 Fault (DS1) - Displays the status of the 1 GHz PLL, Green locked or Red unlocked Axcera-LLV20AT FCC Type Acceptance Report Parts List/Tune-up Info September 2007 7-3 PLL 2 Fault (DS2) - Displays status of the 1.1-1.9 GHz PLL, Green locked or Red unlocked AGC Fault (DS7) – NOT USED IN THIS CONFIGURATION. AGC Override (DS3) - Displays status of AGC cutback, either Green normal drive level, no cutback, or Red cutback, too much drive level to driver module. Manual AGC (DS6) - Displays status of the control of the AGC level, either Green, in AGC, AGC Adj. using R6 or Amber, in manual, Man Gain Adj. using R7. 7.2.4 VHF/UHF Upconverter Module Assembly Switch the transmitter to Operate. Verify that all LEDs located on the front panel of the Upconverter are Green. The following details the meaning of each LED: PLL 1 Fault (DS1) - Displays the status of the 1 GHz PLL, Green locked or Red unlocked PLL 2 Fault (DS2) - Displays status of the 1.1-1.9 GHz PLL, Green locked or Red unlocked AGC Fault (DS7) - Displays status of AGC, Green normal or Red out of range AGC Override (DS3) - Displays status of AGC cutback, either Green nor…

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FCC TYPE ACCEPTANCE REPORT LLV20AT 20 WATT VHF LOW BAND TRANSMITTER AXCERA, LLC 103 FREEDOM DRIVE P.O. BOX 525 LAWRENCE, PA 15055-0525 USA (724) 873-8100 • FAX (724) 873-8105 www.axcera.com • [email protected]

TD-020811 Rev. D PWR Supply mA M VM OSC. pin 1 pin 14 pin 7 pin 8 O/P Load incl Probe Cl OUT GND OUTVdd Option Specifications subject to change without notice. Aging: Designed to meet today's requirements for tighter frequency stability tolerance while reducing unit cost. 14 Pin Dip, 3.3V & 5V, HCMOS/TTL CXOH / CXOHV Model 1MHz to 38MHz ±1ppm to ±5ppm ±0.5ppm Max ±0.3ppm Max -40°C to 85°C -55°C to 120°C 3.3V or 5V ± 5% ±3ppm Min Voltage Trim Pin 1 15mA Typ, 30mA Max HCMOS/TTL 40/60% Max @ 50% Vdd 45/55% Max 4ns Typ, 10ns Max "0" = 10% Vdd Max "1" = 90% Vdd Min 15pF/10TTL Max Frequency Range: Frequency Stability: Freq. Stability vs Volt: Freq. Stability vs Load: Temperature Range: Storage: Input Voltage: Mech. Trim. Range: (Option V) Input Current: Output: Symmetry: (Option Y) Rise/Fall Time: Output Voltage: Load: CXOH CXOHV - 4 B C 3 Y - 25.000 Crystek Part Number Guide #6 #8 #1 Crystek TCXO HCMOS/TTL #2 V or blank = (V = Volt.Trim) (Blank = Mech. Trim) #3 4 or blank = Height (4 = 4.5mm) (Blank = 5.0mm) #4 Letter = Operating Temperature (see table 1) #5 Letter = Frequency Stability (see table 1) #6 3 or blank = Input Volt (3 = 3.3 volts) (Blank= 5V) #7 Y or blank = Symmetry (Y=45/55) (Blank = 40/60) #8 Frequency in MHz: 3 or 6 decimal places Example: CXOH-4BC3Y-25.000 = mech. trim, 4.5mm, -10/60, ±2.5ppm, 3.3V, 45/55%, 25.000MHz CXOHV-4B3CY-25.000 = volt. trim, 4.5mm, -10/60,±2.5ppm, 3.3V, 45/55%, 25.000MHz #1#3#4#5#7#2 Table 1 Operating Temperature Freq. Stability (± ppm) 0°C to 50°C -10°C to 60°C -10°C to 70°C -20°C to 70°C -30°C to 60°C -30°C to 70°C -30°C to 75°C -40°C to 85°C 1.52.0 2.0 2.0 2.0 2.5 2.5 2.5 2.5 2.5 2.5 3.0 3.0 3.0 3.0 3.0 3.0 3.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.05.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 ABCDEF A B C D E F G H 1.0 P 2.5 3.0 2.0 2.0 2.0 CRYSTEK Freq Part no DC .720 (18.30) .472 (12.00) .300 (7.62) #7 #8#14 #1 *A .098 (2.50) .157 (4.00) .600 (15.24) PINFunction 1 7 8 14 VT or NC GND OUT Vcc .178 (4.50) .197 (5.00) *A .300 (7.62) .150 (3.81) .030 (0.76) .075 (1.90) Suggested PCB Layout .150 (3.81) .300 (7.62) .051 (1.30) ID= .360 (9.14) .157 (4.00) Min .039 (1.00) .020 (0.50) All dimensions are Max unless otherwise specified. Dimensions inches (mm) ± 5ppm Min (5V) 2.5V ± 2.5V (3.3V) 1.65V ± 1.65V Voltage Trim Pin 1: Control Voltage: VCTCXO Specification 1ppm Max / yr 24 Temperature Compensated Crystal Oscillator Voltage Trim Option Available

Axcera-LLV20AT Type Acceptance Report Test Report September 2007 4-1 4. TEST REPORT 4.1 RF Power Measurements Figure 4-1 shows the test equipment setup for the RF power measurements. Figure 4-1. Test Equipment Setup for RF Power Measurements The video modulation was adjusted for 25% modulation with sync and blanking video signals and the aural power was turned off. The power was then adjusted to obtain 12 watts of average visual RF output (20 watts peak sync at the output connector). This level was used to establish a reference on the spectrum analyzer. LO Tektronix TSG90 Video Generator Transmitter Under Test HP Power Meter Bird Model 8325 50 Ohm Termination Video Input RF Output LO Sample Splitter RF IF LO Mini-Circuits ZFM Mixer Tektronix 1450 Demodulator IF Input Tektronix VM700A Video Measurement Test Set Video Narda Directional Coupler TEK Sideband Adapter TEK TL12 Spectrum Analyzer HP 8560E Spectrum Analyzer Tektronix 380 Video Measurement Test Set Video Marconi 2022-D Signal Generator Axcera-LLV20AT Type Acceptance Report Test Report September 2007 4-2 Next, the aural power was turned on and adjusted to 10 dB below the visual power. The following operating parameters were recorded: Peak Visual Power: 100% = 20W Peak Aural Power: 100%=2W CW Reflected Power: <1% 4.2 Modulation Characteristics 4.2.1 Video Modulation The test setup shown in Figure 4-1 was used to adjust the video signal to obtain a white picture level. The modulation was accurately measured to be 87.5% while maintaining a depth of modulation at blanking by using the Tektronix 1450 Demodulator chopper function. Next, the video was adjusted for modulated staircase and the differential phase and gain were measured and recorded as follows: • Differential phase: +/- 1.5° • Differential gain : 4.2% Figure 4-2 shows the substantially linear transfer characteristics of the transmitter as a demodulated video waveform. Figure 4-2. Substantially Linear Transfer Characteristics of the Transmitter as a Demodulated Video Waveform Axcera-LLV20AT Type Acceptance Report Test Report September 2007 4-3 4.2.2 Video Envelope Delay Using the test setup in Figure 4-1, the envelope delay was measured and the data recorded as shown in Table 4-1. A sinx/x test pattern was used. Table 4-1. Envelope Delay Measurements VIDEO FREQUENCY (kHz) DELAY (ns) 200 +35 500 +20 1000 -8 1500 +17 2000 - 16 2500 +2 3000 +4 3500 - 130 3580 - 152 4000 - 338 4180 - 400 4.2.3 Video Noise Using the VM700A test set with a low pass 4.2 MHz filter and NTSC-7 weighting, a video noise spectrum of –56.7 dB was measured. The input video signal was 0 IRE with no burst. 4.2.4 Video Frequency Response The test setup shown in Figure 4-1 was used to record the detected video frequency response; the results are shown in Table 4-2 and Figure 4-3. Note: For this test, the video signal was adjusted to provide a 50% average picture level and the video sweep signal level was set to cover the range from black to white picture. Axcera-LLV20AT Type Acceptance Report Test Report September 2007 4-4 Table 4-2. Detected Video Frequency Response VIDEO FREQUENCY RELATIVE RESPONSE 200 kHz +2 dB 500 kHz 0 dB 750 kHz +0.4 dB 1.0 MHz +0.5 dB 1.25 MHz +0.2 dB 1.5 MHz 0 dB 2.0 MHz -0.1 dB 2.5 MHz 0 dB 3.0 MHz +0.4 dB 3.5 MHz +0.5 dB 3.58 MHz +0.6 dB 4.1 MHz -0.7 dB 4.18 MHz -1.0 dB 4.5 MHz -29.0 dB 4.75 MHz -49.0 dB 5.0 MHz -50.0 dB Figure 4-3. Graph of Detected Video Frequency Response 4.2.5 RF Sideband Response The RF sideband response was recorded using the test setup shown in Figure 4-1. With the output power set to 20 watts peak of sync, the Tektronix sideband adapter was adjusted to provide a sweep test signal and the RF sideband response was recorded. Data from this test is provided in Table 4-3. Photographs of the spectrum analyzer results are shown in Figure 4-4. Axcera-LLV20AT Type Acceptance Report Test Report September 2007 4-5 Table 4-3. RF Sideband Response OUTPUT FREQUENCY (MHz) VIDEO FREQUENCY RESPONSES 83.25 Carrier -- 83.45 +200 KHz 0 (reference) 83.455 +250 1.0 83.75 +500 -4.2 84.00 +750 -4.4 84.25 +1000 -4.3 85.25 +2000 -4.8 86.25 +3000 -4.4 87.25 +4000 -4.9 87.75 +4500 -18.0 88.00 +4750 -50 88.25 +5000 -50 83.00 -250 -0.4 82.75 -500 -4.2 82.50 -750 -4.8 82.25 -1000 -11 82.00 -1250 -29 81.75 -1500 -33 81.50 -1750 -38 81.25 -2000 -50 80.25 -3000 -50 79.67 -3580 -50 79.25 -4000 -50 78.25 -5000 -50 89.00 +5750 -50 Figure 4-4. Spectrum Analyzer Results Axcera-LLV20AT Type Acceptance Report Test Report September 2007 4-6 4.2.6 Audio Modulation The FM deviation and distortion was measured using the test setup shown in Figure 4-5. Figure 4-5. Test Setup for Measuring FM Deviation and Distortion The results of measuring the FM deviation and distortion are shown in Table 4-4. Table 4-4. Results of FM Deviation and Distortion Measurements AUDIO FREQUENCY DEVIATION 6.25 KHz DISTORTION DEVIATION 12.5 KHz DISTORTION DEVIATION 25 KHz DISTORTION DEVIATION 40 KHz DISTORTION 100 Hz 0.25% 0.14% 0.08% 0.04% 1000 Hz 0.27% 0.15% 0.09% 0.06% 5000 Hz 0.31% 0.18% 0.10% 0.07% 15000 Hz 0.39% 0.23% 0.24% 0.10% While maintaining ±25 KHz deviation, the audio input frequency and level were varied and the response was recorded. The results are shown in Table 4-5. Table 4-5. Results of Varying the Audio Input Frequency and Level AUDIO FREQUENCY RESPONSE (RELATIVE TO 100 Hz) 50 Hz -0.2 dB 100 Hz 0.0 400 Hz +0.2 dB 1000 Hz +1.1 dB 2000 Hz +3.1 dB 5000 Hz +8.2 dB 10000 Hz +13.3 dB 15000 Hz +16.4 dB Tektronix TSG90 Video Generator Transmitter Under Test Coupler 50 Ohm Load Video Input Amber 3501 Dist. Analyzer/Audio Si gnal Generator Audio Output Amber 3501 Audio Generator Audio Input RF HP 8901A Modulation Analyzer Axcera-LLV20AT Type Acceptance Report Test Report September 2007 4-7 Note: The HP modulation analyzer provides a calibrated audio output level that is suitable for determining the FM deviation. De-emphasis can be switched on or off for this measurement. It was off for the purposes of these tests. For…

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Axcera-LLV20AT FCC Type Acceptance Report Table of Contents September 2007 TABLE OF CONTENTS CHAPTER 1 ID LABEL/LOCATION INFO 1.1 Rear Panel FCC Label ........................................................................... 1-1 1.2 Rear Panel Manufacturer's Label ............................................................ 1-1 1.3 Rear view, complete Axcera-LLV20AT Transmitter w/FCC & Manuf. Label ... 1-2 CHAPTER 2 EXTERNAL PHOTOS 2.1 Front view, complete Axcera-LLV20AT Transmitter .................................. 2-1 2.2 Rear view, complete Axcera-LLV20AT Transmitter ................................... 2-1 2.3 Top view, Output Bandpass Filter .......................................................... 2-2 CHAPTER 3 SCHEMATICS CHAPTER 4 TEST REPORT 4.1 RF Power Measurements ...................................................................... 4-1 4.2 Modulation Characteristics .................................................................... 4-2 4.2.1 Video Modulation........................................................................ 4-2 4.2.2 Video Envelope Delay.................................................................. 4-3 4.2.3 Video Noise ............................................................................... 4-3 4.2.4 Video Frequency Response .......................................................... 4-3 4.2.5 RF Sideband Response ................................................................ 4-4 4.2.6 Audio Modulation........................................................................ 4-6 4.2.7 FM Noise ................................................................................... 4-7 4.3 Occupied Bandwidth ............................................................................ 4-7 4.4 Conducted Spurious Emissions .............................................................. 4-8 4.5 Radiated Emissions.............................................................................4-10 4.6 Frequency Stability .............................................................................4-12 4.7 Test Equipment ..................................................................................4-14…

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