OPH-KAW1100Video Transmission System

VTRAN-2500 OWNER’S MANUAL K&A Wireless, LLC 6212B Antigua, NE Albuquerque, NM 87111 (505) 237-0847 Phone (505) 237-0873 Fax www.ka-wireless.com [email protected] SAFETY NOTICES: I. THIS DEVICE COMPLIES WITH FCC RULES PART 15. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITONS: (1) This device may not cause harmful interference, and (2)This device must accept any interference received, including that causing undesired operation. II. This is NOT an intrinsically safe device. Do not take into area where intrinsic safety is required. Bodily harm may result if ignored. III. DO NOT OPERATE TRANSMITTER WITHOUT ANTENNA CONNECTED TO ANTENNA PORT. Failure to do so will result in damage to the unit. PRODUCT DESCRIPTION The VTRAN-2500 digital, video transmission system uses state-of-the-art Direct- Sequence Spread-Spectrum (DS-SS) technology. Operating in the 2.4 GHz ISM band, it provides long range transmission and superior performance as compared to the available analog (FM) video transmitters that comply with FCC Part 15 regulations. The ISM band is an unlicensed band allocated by the FCC, therefore no license is required to operate the system. In addition to the enhanced performance, the DS-SS technology provides a secure, low-probability-of-intercept (LPI), which significantly reduces the ability of unwanted parties from receiving and re-broadcasting the transmitted signal. VTRAN-2500 Transmitter The VTRAN-2500 transmitter has two ports. The first is the antenna port. Each transmitter sold by the manufacturer is supplied with a dipole antenna. This antenna has a non-standard connector to comply with FCC regulations and is not interchangeable. Any attempt to operate the system without an antenna or an antenna that is not manufacturer approved will result in damage to the system and will nullify any existing warranties. The second port on the transmitter is the video port. A cable that is supplied by the camera manufacturer may be used. The video connection is from the video-output port of the camera to the video-input port of the transmitter. Note that the transmitter unit will not operate if video is not applied. VTRAN-2500 Receiver The VTRAN-2500 is a four-channel ready receiver. The receiver has three ports. The first is the video-output port. This port is used to display the image on a monitor or television set. Any monitor that can accept NTSC (standard) video will display the image generated by the transmitter. The second port on the receiver is the antenna port. This port is used to connect the antenna to the receiver. The connector that is supplied with the receiver is a standard SMA connector. This port can also be used to connect a high-gain antenna to the receiver to increase performance of the system. Any high gain antenna that has an SMA connector or whose connector can be adapted to SMA can be used. To optimize performance, the manufacturer of the VTRAN-2500 has a number of optional high-gain antennas that are available for purchase. The third port is the power port. The manufacturer of the VTRAN-2500 supplies a cigarette lighter adapter for use with the receiver unit. An optional wall transformer is made available through the manufacturer of the VTRAN-2500. Manufacturer supplied wall transformers and cigarette lighter adapters have been tested to comply with the receiver. Any attempt to use power supplies that are not manufacturer approved will result in nullification of the warranty. The receiver also includes a channel selector switch with an indicator. Each receiver can accommodate up to four different transmitters operating at four different channels. By scrolling through the channels, the images transmitted by the individual transmitters can be displayed. TURN-ON PROCEDURES TRANSMITTER 1. Connect dipole antenna to transmitter antenna port 2. Connect video-output from camera to video-input port on the transmitter 3. Connect power (or battery) to the transmitter RECEIVER 4. Connect antenna to receiver antenna port 5. Connect video-output port to video-input on a monitor 6. Turn monitor on 7. Connect cigarette lighter adapter to cigarette lighter OR 8. Connect power port to wall adapter Once the procedures are complete and the camera is on, “CHANNEL 1” will appear on the bottom of the screen. This is an indication that the receiver is functional. If the transmitter is functioning, there will be a live picture on the screen. If the Channel indicator is on a gray screen, check for proper channel selector by scrolling through all four channel. If the gray screen is still present, this is an indication that the transmitter may not be functioning properly. TROUBLESHOOTING Receiver Operational? Yes Check Transmitter No Display Light On? Gray Screen with Channel Indicator? Yes Yes Receiver Functional No Check Power Supply Connection Check Monitor Settings No Transmitter Operational? Yes Live Picture on Monitor Video Connected and Camera on? No Is LED On? Yes Replace Battery or Check power supply No Turn Camera on and connect video Yes/No

6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] A K & W I R E L E S S, L L C A subsidiary of ASSA Industries, LLC FCC AUTHORIZATION Date:05/18/01Time:5/18/01 8:44 AM To:FCC Authorization & Evaluation Division 7435 Oakland Mills Road Columbia, MD. 21045-0429 From:Kamil AgiPhone: (505) 237-0847 PresidentFax: (505) 237-0873 Applicant:K&A Wireless, LLCE-mail : [email protected] ___________________________________________________________________________ Dear Ladies and/or Gentlemen: I appoint Kenneth L. Boston and James Blaha at L.S. Compliance, Inc. to act as an agent in the preparation under Part 15 of the rules and regulations of the Federal Communications Commission. I certify that the exhibitions properly describe the device being submitted under this application and will implement any changes described in the test report. The labels described will be affixed to each item. The following statement is required by the Federal Communications Commission: By checking YES, the applicant certifies that, in the case of an individual applicant, he or she is not subject to a denial of federal benefits, that included FCC benefits, pursuant to section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C 853(a), or, in the case of a non-individual applicant (e.g. corporation, partnership, or other unincorporated association), no party to the application is subject to denial of federal benefits, that includes FCC benefits, pursuant to that section. ___X___YES______ _ NO Dated this 12 th day of August 1999. Kamil Agi By: Kamil Agi President – K&A Wireless, LLC Phone: (505) 237-0847

6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] A K & W I R E L E S S, L L C A subsidiary of ASSA Industries, LLC VTRAN-2500 TESTING PROCEDURE 1. Obtain Manufacturing Report 2. Record transmitter and receiver serial numbers and the PCB manufacturers name 3. Connect transmitter to power meter 4. Measure and record the drain and gate voltages 5. Measure and record the quiescent drain current. This is achieved by setting the input RF such that the output power is zero 6. Increase input RF until ______ mW of power is measured at the antenna port 7. Record the power level and the drain current 8. Connect transmitter output to spectrum analyzer 9. Verify channel of operation 10. Verify the sidelobe levels (must be lower than 20 dBc) 11. Verify the out of band levels are below 50 dBc 12. Print spectrum and staple to Manufacturing report Tested by:______________________________Date:___________________________ Verified by:_____________________________Date:___________________________

A K & W I R E L E S S, L L C A subsidiary of ASSA Industries, LLC MANUFACTURING REPORT TECHNICIAN:________________________ DATE:__________________ TRANSMITTER S/N:___________________ MFG. of A/D PCB: ________ RECEIVER S/N: _______________________ MFG. of D/A PCB: ________ TRANSMITTER PERFORMANCE PARAMETERS: Channel of Operation: ______________ IDQ: _________________mA VGG: _________________VDC VDD: _________________VDC ID: ___________________mA Pout: __________________mW RECEIVER PERFORMANCE PARAMETERS: CUSTOMER: ____________________________ CHANNELS OF OPERATION: _____________ MINIMUM MEASURED CURRENT _________________mA – CHANNEL: ____________________ MAXIMUM MEASURED CURRENT:_________________mA – CHANNEL: ____________________ Performed by: ________________________ Date: _______________ Verified by: __________________________ Date: _______________

L. S. Compliance, Inc. MEMO Date: February 11, 2000 To:FCC – OET Mr. Errol Chang From:L. S. Compliance, Inc. Jim Blaha Subject: Written response to Correspondence Reference Number: 11999 Dear Joe, Below is the formal response from Mr. Kamil Agi to your Correspondence Reference Number: 11999. Please review and respond ASAP if there are any additional issues or questions that may hold up the processing if this filing. Please respond at your earliest convenience to resolve these additional issues. Thank you for your immediate consideration to Grant FCC Authorization for this filing. Sincerely, Jim Blaha L. S. Compliance, Inc. Response from Mr. Kamil Agi To: Dr. Errol Chang - FCC Application Processing Branch From: Kamil Agi, President - K&A Wireless, LLC CC: Jim Blaha/Ken Boston - LS Research and Compliance Date: 2/11/00 Re: FCC ID OPH-KAW1100 - Reference Number: 11999 The following are my comments to correspondence reference number 11999: L. S. Compliance, Inc. W66 N220 Commerce Court Cedarburg, Wisconsin 53012 Phone: 414 - 375 - 4400 Fax: 414 - 375 - 4248 Page 2 For item #1: Our modular transmitters are enclosed in a brass box for RF shielding purposes. For item #2: Our system consists of an A/D converter board for video, which converts the analog video to a digital data stream, and a radio board, which handles the spreading, upconversion and power amplification. The buffering of the video input occurs in two places (with respect to the external connector). The first is in the part HI1179, which is a video A/D converter. In addition, the video signal through the A/D converter is double buffered using two CY7C109-15VC (RAM devices). Secondarily, we use a 74FCT164245TPA on the radio board to buffer the input data signals to the radio board from the A/D board. For item #3: All of our transmitters are provided with a separate regulated power supply board. As an OEM, we are providing the modular transmitter to our customers for final packaging. Since the requirements vary from customer to customer, the power supplies are provided external to the brass package. Our customers have been instructed not to tamper with any portion of the system, including the power supplies. IN THE FINAL PACKAGE, the power supplies are NOT ACCESSIBLE TO THE END USER. For item #4: All the modular transmitters will be provided with a reverse polarity SMA (RP-SMA) connector, which is a unique connector, to couple the antenna to the radio board. The antennas provided will be RP-SMA compatible. For item #5: The tests were all performed in the stand-alone configuration. Page 3 For item #6: There are FCC labels currently on the modular transmitters. When the modular transmitter is private labeled, the customer requests that our company name does not appear on the final package of the product. Therefore, we propose that an alternative label be affixed to the final package in a visible location that states the following: The internal 2.4 GHz spread spectrum transmitter has been filed with the FCC under FCC ID# OPH-KAW1100. We, as the OEM, will request that the customer affix the label to the outside of their final package to reference the transmitter. As a manufacturer, we will include this label on the outside of the final package in a visible location. *************************************************************** ******** Kamil Agi, Ph.D. K&A Wireless, LLC 6212B Antigua, NE Albuquerque, NM 87111 (505) 237-0847 Phone (505) 237-0873 Fax e-mail: [email protected] URL: www.ka-wireless.com *********************************************************************** Original e-mail Correspondence Number 11999 -----Original Message----- From: OET [mailto:[email protected]] Sent: Wednesday, February 09, 2000 2:07 PM To: [email protected] Subject: Information requested To: Kamil Agi, K & A Wireless, LLC From: Errol Chang [email protected] FCC Application Processing Branch Page 4 Re: FCC ID OPH-KAW1100 Applicant: K & A Wireless, LLC Correspondence Reference Number: 11999 731 Confirmation Number: EA95933 Date of Original E-Mail: 02/09/2000 In order to get approval for a modular transmitter the following requirements must be met - please confirm 1. Modular transmitters must have its own RF shielding 2. Modular transmitters must have buffered modulation/data inputs (if such inputs are provided) 3. Modular transmitters must have its own power supply regulation. 4. Modular transmitters must have an antenna which complies with the requirements of Section 15.203 to be permanently attached or employ a "unique" antenna coupler. 5. Modular transmitters must be tested in a stand - alone configuration, i.e., the antenna, AC or DC power and data input/output lines must be connected to the module but, the module must not be inside another case during testing. 6. Modular transmitters must be labelled with its own FCC ID number, and if the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. The items indicated above must be submitted before processing can continue on the above referenced application. Failure to provide the requested information within 60 days of the original e-mail date may result in application dismissal pursuant to Section 2.917 (c) and forfeiture of the filing fee pursuant to section 1.1108. DO NOT reply to this e-mail by using the Reply button. In order for your response to be processed expeditiously, you must upload your response via the Internet at www.fcc.gov, Electronic Filing, OET Equipment Authorization Electronic Filing. If the response is submitted through Add Attachments, in order to expedite processing, a message which informs the processing staff that a new exhibit has been submitted must also be submitted via Submit Correspondence. Also, please note that partial responses increase processing time and should not be submitted. Any questions about the content of this…

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L. S. Compliance, Inc. MEMO Date: February 11, 2000 To:FCC – OET Mr. Errol Chang From:L. S. Compliance, Inc. Jim Blaha Subject: Written response to Correspondence Reference Number: 11999, EA 95933. Dear Errol, Below is the formal response from Mr. Kamil Agi to your Correspondence Reference Number: 11999. Please review and respond ASAP if there are any additional issues or questions that may hold up the processing if this filing. Please respond at your earliest convenience to resolve these additional issues. Thank you for your immediate consideration to Grant FCC Authorization for this filing. Sincerely, Jim Blaha L. S. Compliance, Inc. Response from Mr. Kamil Agi To: Dr. Errol Chang - FCC Application Processing Branch From: Kamil Agi, President - K&A Wireless, LLC CC: Jim Blaha/Ken Boston - LS Research and Compliance Date: 2/11/00 Re: FCC ID OPH-KAW1100 - Reference Number: 11999 The following are my comments to correspondence reference number 11999: L. S. Compliance, Inc. W66 N220 Commerce Court Cedarburg, Wisconsin 53012 Phone: 414 - 375 - 4400 Fax: 414 - 375 - 4248 Page 2 For item #1: Our modular transmitters are enclosed in a brass box for RF shielding purposes. For item #2: Our system consists of an A/D converter board for video, which converts the analog video to a digital data stream, and a radio board, which handles the spreading, upconversion and power amplification. The buffering of the video input occurs in two places (with respect to the external connector). The first is in the part HI1179, which is a video A/D converter. In addition, the video signal through the A/D converter is double buffered using two CY7C109-15VC (RAM devices). Secondarily, we use a 74FCT164245TPA on the radio board to buffer the input data signals to the radio board from the A/D board. For item #3: All of our transmitters are provided with a separate regulated power supply board. As an OEM, we are providing the modular transmitter to our customers for final packaging. Since the requirements vary from customer to customer, the power supplies are provided external to the brass package. Our customers have been instructed not to tamper with any portion of the system, including the power supplies. IN THE FINAL PACKAGE, the power supplies are NOT ACCESSIBLE TO THE END USER. For item #4: All the modular transmitters will be provided with a reverse polarity SMA (RP-SMA) connector, which is a unique connector, to couple the antenna to the radio board. The antennas provided will be RP-SMA compatible. For item #5: The tests were all performed in the stand-alone configuration. Page 3 For item #6: There are FCC labels currently on the modular transmitters. When the modular transmitter is private labeled, the customer requests that our company name does not appear on the final package of the product. Therefore, we propose that an alternative label be affixed to the final package in a visible location that states the following: The internal 2.4 GHz spread spectrum transmitter has been filed with the FCC under FCC ID# OPH-KAW1100. We, as the OEM, will request that the customer affix the label to the outside of their final package to reference the transmitter. As a manufacturer, we will include this label on the outside of the final package in a visible location. *************************************************************** ******** Kamil Agi, Ph.D. K&A Wireless, LLC 6212B Antigua, NE Albuquerque, NM 87111 (505) 237-0847 Phone (505) 237-0873 Fax e-mail: [email protected] URL: www.ka-wireless.com *********************************************************************** Original e-mail Correspondence Number 11999 -----Original Message----- From: OET [mailto:[email protected]] Sent: Wednesday, February 09, 2000 2:07 PM To: [email protected] Subject: Information requested To: Kamil Agi, K & A Wireless, LLC From: Errol Chang [email protected] FCC Application Processing Branch Page 4 Re: FCC ID OPH-KAW1100 Applicant: K & A Wireless, LLC Correspondence Reference Number: 11999 731 Confirmation Number: EA95933 Date of Original E-Mail: 02/09/2000 In order to get approval for a modular transmitter the following requirements must be met - please confirm 1. Modular transmitters must have its own RF shielding 2. Modular transmitters must have buffered modulation/data inputs (if such inputs are provided) 3. Modular transmitters must have its own power supply regulation. 4. Modular transmitters must have an antenna which complies with the requirements of Section 15.203 to be permanently attached or employ a "unique" antenna coupler. 5. Modular transmitters must be tested in a stand - alone configuration, i.e., the antenna, AC or DC power and data input/output lines must be connected to the module but, the module must not be inside another case during testing. 6. Modular transmitters must be labelled with its own FCC ID number, and if the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. The items indicated above must be submitted before processing can continue on the above referenced application. Failure to provide the requested information within 60 days of the original e-mail date may result in application dismissal pursuant to Section 2.917 (c) and forfeiture of the filing fee pursuant to section 1.1108. DO NOT reply to this e-mail by using the Reply button. In order for your response to be processed expeditiously, you must upload your response via the Internet at www.fcc.gov, Electronic Filing, OET Equipment Authorization Electronic Filing. If the response is submitted through Add Attachments, in order to expedite processing, a message which informs the processing staff that a new exhibit has been submitted must also be submitted via Submit Correspondence. Also, please note that partial responses increase processing time and should not be submitted. Any questions about the co…

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6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] A K & W I R E L E S S, L L C A subsidiary of ASSA Industries, LLC VTRAN-2500 BLOCK DIAGRAMS PREPARED BY: Kamil Agi, President K&A Wireless, LLC 6212B Antigua NE Albuquerque, NM 87111 (505) 237-0847 (Phone) (505) 237-0873 (Fax) [email protected] THE INFORMATION CONTAINED WITHIN THIS DOCUMENT IS CONSIDERED CONFIDENTIAL AND SHOULD BE TREATED AS SUCH. THE DOCUMENT WAS PREPARED FOR THE FEDERAL COMMUNICATIONS COMMISSION AND WAS NOT INTENDED FOR DISTRIBUTION. ConfidentialPage 205/18/01 6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] Table of Contents VTRAN-2500 BLOCK DIAGRAMS ________________________________________ 1 Table of Contents ___________________________________________________________ 2 Top-Level Transmitter Block Diagram__________________________________________ 3 Top-Level Receiver Block Diagram_____________________________________________ 3 Transmitter Analog to Digital Converter Block Diagram___________________________ 4 RF Transmitter Board Block Diagram __________________________________________ 4 RF Amplifier Board Block Diagram ____________________________________________ 4 RF Receiver Board Block Diagram _____________________________________________ 5 Receiver Digital To Analog Converter Board Block Diagram _______________________ 5 ConfidentialPage 305/18/01 6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] Top-Level Transmitter Block Diagram RF Transmitter Board Analog to Digital Converter Board Regulated Power Supply Board NTSC Video In RF Power Amplifier Board Regulated Power Supply Board Top-Level Receiver Block Diagram Digital to Analog Converter RF Receiver Board Regulated Power Supply Board NTSC Video Out ConfidentialPage 405/18/01 6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] Transmitter Analog to Digital Converter Block Diagram NTSC Video Digitizer Frame Buffer Parallel to Serial Converter NTSC Video In To RF Transmitter Board RF Transmitter Board Block Diagram PCMCIA Connector Buffer Baseband Processor I/Q Modulator RF/IF Converter DQPSK Modulator Spreader I Q To RF Amplifier Board RF Amplifier Board Block Diagram RF In BPF To Antenna Regulated Drain Voltage Regulated Gate Voltage ConfidentialPage 505/18/01 6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] RF Receiver Board Block Diagram LNA RF/IF Converter I/Q Demodulator I Q Despreader Demod Baseband Processor To D/A Board Receiver Digital To Analog Converter Board Block Diagram D/A Converter Frame Buffer Serial to Parallel Converter NTSC Video Out

K and A Wireless, LLC Video Transmitter Case with FCC Label and External Cables

K and A Wireless, LLC Video Transmitter Case with Close-up of FCC Label

K and A Wireless, LLC Video Transmitter Case Flip Side of Case

K and A Wireless, LLC Video Transmitter Case Open for Inspection with Red/Black Power leads Orange Power lead Two Connecting Cables

K and A Wireless, LLC Video Transmitter Case Close-up of Baseband Board and RF Transmitter Board ( lower )

K and A Wireless, LLC Video Transmitter Case Close-up of Baseband Board ( top )

K and A Wireless, LLC Video Transmitter Case Close-up of Baseband Board ( flip side )

K and A Wireless, LLC Video Transmitter Case Close-up of RF Transmitter Board ( top )

K and A Wireless, LLC Video Transmitter Case Close-up of RF Transmitter Board ( flip side )

K and A Wireless, LLC Video Transmitter Case Close-up of RF Output Amp / Filter

K and A Wireless, LLC Video Transmitter Case Close-up of RF Output Amp / Filter Out of shield, ( top side )

K and A Wireless, LLC Video Transmitter Case Close-up of RF Output Amp / Filter Out of shield, ( flip side )

6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] A K & W I R E L E S S, L L C A subsidiary of ASSA Industries, LLC VTRAN-2500 THEORY OF OPERATION PREPARED BY: Kamil Agi, President K&A Wireless, LLC 6212B Antigua NE Albuquerque, NM 87111 (505) 237-0847 (Phone) (505) 237-0873 (Fax) [email protected] THE INFORMATION CONTAINED WITHIN THIS DOCUMENT IS CONSIDERED CONFIDENTIAL AND SHOULD BE TREATED AS SUCH. THE DOCUMENT WAS PREPARED FOR THE FEDERAL COMMUNICATIONS COMMISSION AND WAS NOT INTENDED FOR DISTRIBUTION. ConfidentialPage 205/18/01 6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] Theory of Operation The VTRAN-2500 is a digital, direct-sequence spread-spectrum (DS-SS) video transmission system. The system includes a transmitter and a receiver. The system is designed around the Harris PRISM chip set. The proprietary designs are the analog to digital and digital to analog converters that are used in the system. These boards are then integrated with the Harris PRISM chip set. On the transmitter side, a standard video signal is obtained from a signal source. In our case, the source is a thermal imager in the shape of a camcorder. This video signal is digitized into an eight-bit parallel signal. In order to maintain the correct timing, this signal is sent to a frame buffer, which stores the information until the proper time. Once the correct timing is achieved, the signal is sent to a parallel to serial converter. This converts the parallel data stream into a single data stream. This data stream is formatted to be compatible with the Harris PRISM chip set. Once the analog video is in the proper format, the signal is sent to the RF transmitter board. This board is based on the Harris PRISM chip set. During transmission, the data is sent to the baseband processor on the TX line (the PRISM chip set is a fully duplex solution). The data is then modulated into the differential quadrature phase shift keying (DQPSK) format. This provides a data rate of 2 MBPS. The data is then spread using the programmable PN code. There are two signals that are generated at this point (I and Q). The I and Q signals are sent to the modulator, where the signal is filtered and then modulated with an IF frequency of 280 MHz. The two signals are then combined and sent to the up-converter. The up-converter shifts the IF frequency to one of the four channels that are programmed in the synthesizer. These frequencies are located within the 2.4-2.483 GHZ (ISM) band. This signal is then passed through a power amplifier. The power amplifier produces an output power of ???mW, measured at the antenna. On the receive side, the signal is obtained from the antenna and passed through a low-noise amplifier (LNA), which amplifies the low level signal. The signal is then passed through the down-converter and through the demodulator. Here there are two signals that have to be maintained, the I and Q. These signals are then passed through the baseband processor and demodulator, from the DQPSK format. The signal is then passed as a serial data stream to the Digital to Analog Converter board. The analog converter converts the serial data to a parallel stream of data. This data is then triple buffered and converted to a standard analog signal using a D/A converter. From there the signal is displayed on a standard monitor. The entire system is powered by two power supplies. The first is a linear regulator circuit that takes a given input voltage and outputs a regulated voltage. The second regulator circuit is used for the negative voltage required to bias the amplifier gate. This negative voltage is obtained using a voltage inverter.

6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] A K & W I R E L E S S, L L C A subsidiary of ASSA Industries, LLC VTRAN-2500 CIRCUIT SCHEMATICS PREPARED BY: Kamil Agi, President K&A Wireless, LLC 6212B Antigua NE Albuquerque, NM 87111 (505) 237-0847 (Phone) (505) 237-0873 (Fax) [email protected] THE INFORMATION CONTAINED WITHIN THIS DOCUMENT IS CONSIDERED PROPRIETARY AND SHOULD BE TREATED AS SUCH. THE DOCUMENT WAS PREPARED FOR THE FEDERAL COMMUNICATIONS COMMISSION AND WAS NOT INTENDED FOR DISTRIBUTION. Page 205/18/01 6212B ANTIGUA NE ALBUQUERQUE, NM 87111 PHONE 505-237-0847 FAX 505-237-0873 E-mail [email protected] Table Of Contents VTRAN-2500 CIRCUIT SCHEMATICS ...................................................................................................1 TABLE OF CONTENTS ............................................................................................................................. 2 T RANSMITTER ANALOG TO DIGITAL CONVERTER CIRCUIT SCHEMATIC...................................................... 3 R ECEIVER DIGITAL TO ANALOG CONVERTER CIRCUIT SCHEMATIC............................................................ 4 P OWER AMPLIFIER CIRCUIT SCHEMATIC..................................................................................................... 5 P OWER SUPPLY SCHEMATICS...................................................................................................................... 6 Gate Regulator Schematic ...................................................................................................................... 6 Linear Regulator Schematic .......................................................................................................…

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