SSBXL20-10MEDXL 20 AND XL10 DIGITAL TRANSMITTER RETROFIT KIT

! ! ! ! ! ! ! ! ! ! ! ! ! ! Input Channels: Off-Air 2 through 69 (VHF,UHF) Output Channels: Standard Cable; Off-Air: 2 through 70 (VHF, UHF) SAW Filtered IF: Designed for Adjacent Channel Operation T.C.X.O. Frequency control Input +/- 150Hz +60dBmV Output Using Low-Distortion Hybrid Amplifiers Non-Volatile Channel Memory Synthesized Oscillators - Crystal Referenced Phase Locked Digital LED Channel Readout Muted RF During Tuning RS232 Control Option with Daisy-Chain Capability AGC Test Point Surface Mount Technology (SMT) Standard Dimensions for Rack Mount Stable low noise with switching power supply 110 / 220 P617 - MEDEX Agile Processor Technical Specifications l l l Selectable Channels Analog Television Processor +60dBmV Output Processor Features The P617 MEDEX Processors are Microprocessor Controlled with Self- Diagnostic Monitoring. The . The Selectable Input Channels receive Off-Air ChannelsSelectable Output Channel option is: Off-Air Channels The information in this document is subject to change without notice. Tuner Section IF Section RF Section Mechanical and Power Channel Tuning Input Impedance75 , Off-Air Channels RF Bandwidth Input AGC Range With PreampMin: -16dBmV; Max: 0dBmV, +44dB V to +60dB V Without PreampMin: -5dBmV; Max: +20dBmV +55dB V to +80dB V Input AGC TypeSync Tip Reference Recommended Input Noise Figure9dB VHF, 10dB UHF Adjacent Channel Rejection60dB Image Rejection60dB Audio Carrier Adjustment RangeFlat Response to -10dB from Input levels Input Frequency Control T.C.X.O+/- 150Hz Video IF Level+37dBmV, +97dB V Audio IF Level Return Loss>14dB IF Frequency: Video Carrier Output Frequency2-70 VHF & UHF Loss of Input signalAutomatically shuts down Output signal Frequency Tolerance+/- 1KHz Output Level (Adjustable)+60dBmV (+120dBOutput lmpedance75 Spurious Output<-60 dBc Return Loss>14 dB Manually Control+/- 10KHz or +/- 20KHz offset W m W °° unbalanced 2-70 VHF & UHF 6.0 MHz +27dBmV, +87dB V 45.75MHz IF Frequency: Audio Carrier41.25MHz Video-Sound Spacing+4.5MHz Vestigial Sideband Width0.75MHz Second IF Frequency945.75MHz V) Power110/220 VAC 50/60 Hz, 6W Operating Temperature40 F to 110 F Standard Dimensions19”W x 1.75”H x 14”D Metric Dimensions48.26cm x 4.44cm x 35.56cm Weight12 pounds (5.4 kg) Rack MountingStandard 19” Rack Tuned channel number is displayed by 3-number LED on front panel. Input and output channels are displayed independently. Unit incorporates 3-second tuning delay circuit to minimize inadvertent changes of channel. mm mm m m 0 to +10dBmV, +60 to +70dBVm P-617 Agile Heterodyne Processor 800MHz MEDEXLLC P617 VHF/UHF 8VSB TV TRANSLATOR PROCESSOR MEDEXLLC P617VHF/UHF 8VSB TV TRANSLATORPROCESSOR AGC TP INPUT SELECT INPUT SOURCE + 10KHz 0 STD - 10KHz OUTPUT OUTPUT LEVEL RF -20 dB TP INPUT CHANNEL OUTPUT CHANNEL FREQ LOCK System M/N

Exhibit # 4 The SSBXL20-10MED Block diagram. No parts were changed except in the power metering circuit. Only the amplifier bias was adjusted for the least distortion and best linearity. The EMR low pass filter was the only component added. The MEDEX P617 processor downconverts the 8VSB signal to IF and upconverts it to the desired UHF channel. 20/10W Final 1W 5W Amp ADJ BIAS Added Added Output Modified Everything within the dotted line is contained within the cabinet of the existing unit already type certified. MEDEX P617 Processor Isolator EMR Low Pass Filter 3 Pole Band Pass Filter Dir Comp Power Meter Power Supply &Metering 8 VSB Input

Application for FCC Certification For Model SSBXL20-10 MEDEX A Digital Field Modification Kit, manufactured by: MEDEX, LLC 113 S. 2 nd St E. Riverton, WY 82501 Phone: (307)856-3322 FAX: (307)856-0707 e-mail: [email protected] The Grantee Code for MEDEX, LLC is SSB. The MEDEX Model “SSBXL20-10 MED” is a Digital Field Update Kit to be used with LARCAN TTC Models BSK9A3XL20UU, VU, MU and BSK9A3XL10UU, VU, MU Translators. The kit consists the MEDEX P617 Processor, filter, all necessary parts, and labels to convert the above translators to operate as a hetrodyne digital translator. The following information and exhibits are submitted for type certification of the MEDEX UHF translator field modification kit SSBXL20-10MED for digital operation pursuant to parts 74, sub part G, of the FCC rules. The unit tested specifically for this application was operated on channel 23. This channel was used to show compliance with the RNSS, GPS filter requirement. This unit will meet or exceed the required specifications as per sections 74.794, 74.795, 74.682, 74.750, 74.790, and 74.796 The MEDEX P617 Processor used in the update kit is designed for 8VSB Digital Television. The Processor is a frequency agile input and output processor, containing a saw filter, TCXO, AGC circuits and auto shutoff circuits (The P617 can downconvert any VHF/UHF channel to a 44MHz IF. The upconverter converts this 44 MHz signal to any VHF,UHF output channel, with a signal level necessary to drive the BSK9A3XL20UU, VU, MU and BSK9A3XL10UU, VU, MU Translators for digital use. The P617 is manufactured by CADCO to MEDEX Specifications. See Exhibit 7. 2.933(b) & 2.1043 The origianl ID of the translator being modified is BKS9A3XL20UU,VU,MU and BKS9A3XL10UU,VU,MU, see exhibit A. The input amp, AGC amps, upconverter, local OSC are removed – the MEDEX P617 Processor takes the place of the removed modules. The power supply, voltage and current measuring circuits, 1 Watt, 5 Watt, 20 Watt amps are not change from the original. The output power metering circuits are modified and calibrated for average digital power in a 6 MHz band width and a low pass filter is installed. Where the equipment differs from the original, the necessary test and measurements are included in this application. Where there is no change and the translator continues to represent the original, it will be referenced to the original type #’s, I.E. BKS9A3XL10UU,VU,MU, BKS9A3XL20UU,VU,MU. The BKS9A3XL10UU,VU,MU (10 Watt translator) is identical to the BKS9A3XL20UU,VU,MU (20 Watt). It is operated at 10 Watts instead of 20 Watts analog. The references herein that are required on FCC Form 731 for certification of the SSBXL20-10MED with the attached reference and exhibits as per section 2.1033(b)1 thru 7 and 2.1043(d) using section 2.933, the abbreviated certification procedure. The MEDEX Processor and 3 Pole Filter and the Low Pass Filter combination will be sold to operators of other manufactured equipment who want to do a custom modification pursuant to section 74.796, all sections. Along with the processor, a EMR Low Pass Filter and a 3 Pole Band Pass Filter and the temperature specifications and filter response and a copy of part 74.795 and 74.796 of the rules.

EXTERNAL CONSTRUCTION PHOTOS FRONT VIEW REAR VIEW

Exhibit # 8 FCC IDENTIFICATION LABEL FCC ID: SSBXL20-10MED INPUT: OUTPUT: MODEL: XL20-10MED DIGITAL UPDATE KIT INSTALLED IN THE UNIT DATE: SERIAL NUMBER: MEDEX LLC PO BOX 628, RIVERTON, WY 82501 307-856-3322 FAX: 307-856-0707

FCC ID LABEL LOCATION

INTERNAL CONSTRUCTION PHOTOS TOP VIEW OF CHASSIS VIEW OF INSIDE OF P617 PROCESSOR

March 28, 2005 FEDERAL COMMUNICATIONS COMMISSION OFFICE OF ENGINEERING AND TECHNOLOGY EQUIPMENT AUTHORIZATION BRANCH 445 12 ST. SW WASHINGTON, DC 20554 Dear Sir, This letter is to inform you that the Operational Description for the MEDEX XL20- 10MED transmitter is contained in the user manual which has already been uploaded to the OET website. Sincerely, Gregory L. Best President Greg Best Consulting, Inc. 9223 N. Manning Ave. Kansas City, MO 64157 816-792-2913

OPERATIONAL DESCRIPTION FOR XL20-10 DTV TRANSLATOR RETROFIT KIT The retrofit kit is composed of basically three parts, the P617Medex processor containing the receiver for the DTV translator, the existing Larcan XL20 or XL10, and the EMR Low Pass Filter as shown in the exhibit marked Block Diagram. The power metering circuit has been specifically modified to measure average power. Operationally, the P617Medex receives an off air 8-VSB signal from an external antenna and converts it to an IF frequency. This IF signal is then upconverted and filtered to the desired channel in the P617Medex via selector switches on the unit. The 8 VSB signal on the desired channel is applied to the power amplifier unit of the XL20 or XL10 where its signal is amplified by three assemblies. Following the power amplifier, the 8 VSB signal is applied to a circulator to isolate the power amplifier from the EMR low pass filter. The EMR low pass filter eliminates all harmonics and provides compliance to the emission masks for the GPS bands. Following the low pass filter, the bandpass filter eliminates any mixing spurious products and ensures the combined configuration of the P617Medex and XL20 (or XL10) meets the desired “Simple” emission mask. All power supplies, cooling, and control circuits are the same as originally configured on the XL20 or XL10 unit. The automatic gain control circuit function is inside the P617Medex.

EXHIBIT 6 INSTRUCTION MANUAL FOR SSBXL20-10MED XX WARNING XX ANYONE ATTEMPTING TO MAKE THIS MODIFICATION MUST READ ALL INSTRUCTIONS AND WARNINGS TO INSURE COMPLIANCE TO THE FCC REQUIREMENTS The SSBXL20-10MED Kit is comprised of a MEDEX P617, 8VSB Digital Processor, EMR Low Pass Filter, a Meter Calibrator Circuit, Labels, Manuals and Attenuators. Do not attempt this conversion without a digital 8VSB signal and the following test equipment: Spectrum Analyzer Resistive Dummy Load at least 20 Watts Soldering Iron Digital Milivolt Meter A Camera to document your tests Installation Steps: Refer to the SSBXL20-10MED Manual for parts locations. 1. Turn off the XL Translator, remove the top cover. 2. Remove the following modules: Input Amplifier (TP1) or Downconverter (UVCA), the AGC Amp (TVA2), Oscillator (ULO), and Mixer (Upconverter). 3. Install the BNC to N Adapter. On the input of the 1 Watt Amp, connect the BNC input cable to the connector. 4. Turn to pages 19, 20, & 21, Meter Calibration. 5. Remove the cable from the isolator (blue box on output of last amp). Install the EMR filter to the isolator and connect the cable to the filter. The filter is now stalled between the isolator and the 3 Pole filter. 6. Warning: Be sure the level control on the P617 is turned counter clockwise to the stop, all the way down. Install the 10 dB attenuator on the output of the P617, then connect the cable from the attenuator to the translator. 7. Connect the spectrum analyzer to the BNC test jack on the front panel. 8. Install the Dummy Load on the translator output connector. 9. Turn on the P617, set the input channel, the channel number should stop blinking and the lock light should be lit. 10. Set the output channel on the P617. This completes the installation. Next is the test phase of the update kit. Turn to page 22. Steps to Calibrate Power Meter for Digital on the Power Meter Board 1. Remove the power metering board, with the BNC Connectors to the left 2. Move the right end of R922 (10K) to the right end of R924 (10K). R922 is located next to Pot R921. (See drawing XL4140-1 and XL 4140-2). Solder a ½” high wire to the junction of R918 and R919, located between the 2 IC;s for a test point. 3. Set S902 to average power and replace the board. Set S901 for forward power (on the front panel). 4. Bolt the calibrator to the box on the front right cover with the lid bolt. Connect the 9V battery. With a digital volt meter, with the + lead to ground, measure the output wire and set the calibration pot R3 for the following levels: 5. {XL20 for 5 watts of digital = 250 MV {XL10 for 2.5 watts of digital = 150 MV. 6. Connect the output wire of the calibrator to the wire test point on the power metering board. Turn on the translator, with out input signal. 7. Adjust R921 (forward) and R923 average for a reading of 10 watts on the visual Power Meter scale. This represents100% digital power for the level set in step 5. To set reflected power 8. Remove the BNC connector J904, move the BNC Connector J902 to the J904 jack. 9. With the switch S901 (on front panel) in the reflected position, adjust R936 reverse calibrate for a reading of 10 watts. 10. Turn off the Translator. 11. Replace BNC connectors to normal. 12. Remove the power calibrator, disconnect the battery. (Save the calibrator, you may want to check the calibration again.) 13. Return to page 18, Step 5. Meter Calibrator 6.8K – R1 Blk - output 2K 1.8K 9V Red + R3 R2 Volt Meter TEST AND MEASUREMENT STEPS 1. Set the power meter switch on forward. Set the Multimeter switch on final current. Install the Dummy load on the Output. 2. Turn on the translator. The current meter should read less than ¼ Amp, Power meter should read 0. Slowly turn up the level control until the power meter reads 10W or 100%. The channel meter should be below .75 Amps. WARNING: DO NOT TURN UP THE POWER TOO FAR OR YOU WILL BURN OUT THE OUTPUT TRANSISTORS. 3. adjust the bias controls on the driver and output amps. (the pots on top of the amps, closest to the back). As you adjust them, watch the analyzer, the adjustments will affect the height of the pedestal and the shoulders, the top should always be flat ± 1 dB. (Refer to the anlz picture). Adjust the bias pots for the highest pedestal with the narrowest shoulders, while raising the power level. WARNING: DO NOT EXCEED 100% ON THE POWER METER (10 WATTS = 100% POWER). 4. If the level control is all the way clockwise, and the power is not at 100%, change the attneuator from 10 dB to 6 dB, start with the control counter clockwise. (The attenuator pads are needed as different channels require more drive signal than others). 5. With the power at 100%, set the pedestal to the 10 dB line on the analyzer. There should be at least 36 dB on the sides before it starts to spread. At 61 dB from the top the pedestal spread cannot exceed 6 MHz on each side. (See spectrum pictures). If the sides are uneven or the spread is too wide, the amplifiers are out of alignment (refer to XL Manual to align the amps) or they need repaired. The 3 pole filter may be out of alignment. The spectrum analyzer display has to match the picture. (If you are not familiar with tuning the 3 pole filter, please call MEDEX, LLC.) Do not run the translator if you cannot meet the mask. Reduce the power unit it matches the picture, see copy of FCC rules # 74.796(c) on reduced power. Please fill out the following for your records: 1. __________ is the final voltage. 2. __________ is the final current. 3. __________ is the power out 10 Watts = 100%. 4. __________ is the AGC voltage. 5. Original Manufacture Model # is ____________________. 6. Original Manufacture Serial # is ____________________. 7. MEDEX Processor Model # is ____________________. 8. MEDEX Processor Serial # is ____________________. 9. Update Kit Serial # is ____________________. 10. Attach the Spectrum Analyzer Plots.

SCHEMATIC OF MODIFICATIONS TO XL20 AND XL10

TEST REPORT MEDEX XL20-10MED RETROFIT DTV TRANSMITTER TECHNICAL REPORT INTRODUCTION The following information is provided to support the technical performance of the MEDEX XL20-10MED Retrofit Kit. The information is supplied for DTV broadcast service according to applicable portions of FCC rules contained in Part 2, Part 73, and Part 74. 1. Power Output Measurements as indicated by FCC Rule 74.795. 2. Frequency Measurements as identified by FCC Rule 74.795. 3. Output Power Variation with input level changes as identified by FCC rule 74.795 (c) (2). 4. Emission mask compliance as defined in FCC Rule 74.794. 5. Attenuation to harmonics produced in the RNSS bands as defined in FCC Rule 74.794 6. Demonstration of transmission and reception of 8-VSB ATSC signal. 7. Measurements of voltage and current to final amp stage as outlined in FCC Rule 74.795. Measurements were conducted at transmitter power output levels of 5 watts average and 1.0 watts average and constitute the range of power for which type certification is sought. Measurements were taken on a unit with operating on UHF TV channel 23. All test equipment was calibrated prior to the use of the equipment. The list of test equipment is provided on the page with the test setup. Exhibit # 2A TEST SET UP X 8VSB Chn 8 X IF Loop X X X X In Off Air Calibrated as a Unit To Set Power to 5Watts +37 dBM TEST EQUIPMENT LIST • MEDEX P617 Processor • TTC XL20 SN 6907-5908-006 • HP Spectrum Analyzer #8590 SN 2713A01471 • HP Power meter #432A SN 1848A26841 • NARDA 30 dB #766-30 and Mini Circuits 10 dB #UNAT-10, Mini Circuits High Pass Filter # NHP700 • HP Tracking Generator 8444A-059, SN 2325A05483 • HP8640B SN: 6678A03049 Signal Generator • Wandel & Golteman SMP17 Frequency Counter SN: K0065 • Holand GHS2 75 OHM Splitters • FLUKE 85 Voltmeter • Zenith 8VSB Transcoder DTVTRANS-A SN: 00003013 Processor 8 to 23 TTC Translator XL20-10MED Narda 30 dB Att. And Cables Dir. Coupler HP8590 Spectrum Analyzer HP432 Thermal Power Meter Zenith 8VSB Regenerator Transcoder POWER OUTPUT TESTS The internal power meter was calibrated using the test set up (Exhibit 2A). When the HP Power Meter was measuring +37 DBM, (5 watts) the internal meter was set and calibrated for a reading of 10 on the top scale. This is illustrated in the photograph below. The following photograph shows the MEDEX XL20-10MED operating at 1.0 watt average power. The power meter on the Unit Under Test reads 2 on the top scale corresponding to the level of 1 watt output power. FREQUENCY STABILITY VERSUS TEMPERATURE The MEDEX Processor was inserted into a temperature chamber and the RF input was connected to a channel 8 TV modulator of high stability with Visual input frequency measured at each point that the output frequency is measured. In this manner, the true frequency shift of the MEDEX processor can be measured. The power amplifiers were not part of this measurement since they do not contribute to the frequency stability performance. The temperature was initialized at 40 degrees C and then allowed to stabilize at each of the measurement points identified in the following table. A nominal channel 8 modulator was used in this case because the frequency counter can lock on to the carrier frequency whereas it cannot when an 8 VSB waveform is used. Temp °C Time Visual Input Visual Output Change from Frequency MHz Frequency MHz Input in Hz 40 3:10 PM 181.251152 621.249342 -1810 30 3:20 PM 181.251296 621.250586 -710 20 3:30 PM 181.251331 621.251467 +136 10 3:45 PM 181.251383 621.252614 +1231 0 4:00 PM 181.251392 621.252615 +1223 The frequency change from 20 degrees Celsius to 0 Degree Celsius was +1223 Hz, the frequency change from 20 degrees Celsius to 40 Degree Celsius was -1823 Hz, for a total frequency change of 3,046 Hz. This frequency shift over the temperature is well below the 10 kHz specification in the FCC rules. Temperature Chamber RF In RF Out • HP 53131A Frequency Counter SN: KR01204459 MEDEX P617 Processor Ch 8 TV Modulato r * HP Frequency Counter FREQUENCY DRIFT VERSUS CHANGE IN LINE VOLTAGE The SSBXL20-10MED Translator’s output was set to +37dBM (5 Watt) on Channel 23. 8VSB Ch 8 In Off Air C AC In Test Method: The following method of measuring the pilot carrier of the 8VSB signal was used, as the frequency counter is unable to read the pilot carrier due to the noise like 8VSB signal. The channel 8 digital pilot carrier was combined with the HP signal generator (splitter #1). Splitter #2 feeds the XL20-10MED translator, the other output fed splitter #3. Splitter #3 feeds the HP8590 spectrum analyzer and the frequency counter. The output of the translator and NARDA 30dB attenuator also went to the frequency counter. The HP8640 was adjusted to a zero beat on the pilot carrier, as measured on the spectrum analyzer using a 1 KHz RBW. After the zero beat was obtained the output of the signal generator was raised 20dB and measured on the frequency counter. Then the frequency counter was connected to the translator output and the frequency was measured as recorded. XL20-10MED Translator Ch 23 Narda 30 dB Att. HP8590 Spectrum Analyzer HP432 Thermal Power Meter Σ #1 Σ#2 Σ#3 HP8640 Signal Generator WG Frequency Counter AC Variac Voltmeter FLUKE85 This method was repeated for each of the following voltages: Voltage Input Frequency Reading Output Frequency Reading 95V 180.310360MHz 524.309590MHz Net change 770Hz 118V 180.310360MHz 524.309590MHz Net change 770Hz 136V 180.310360MHz 524.309590MHz Net Change 770Hz Changing the voltage from 95V to 136V did not change the translator output frequency of the pilot carrier. The frequency of the SSBXL20-10MED will be checked and adjusted on each unit before it is shipped. The following results on the power meter were recorded: Voltage Power Output 95V = +37dBM 118V = +37dBM 135 V = +37dBM Changing the voltage did not change the translator output power. AGC PERFORMANCE VERSUS SIGNAL INPUT LEVEL POWER OUTPUT VERSUS INPUT LEVEL TEST Section 74.795(c) (2) iden…

Text truncated - open the document above for the full version.