AIERIT17-142RMODULAR VHF FM RECEIVER

0 PRELIMINARY DR-142 PROGRAMABLE VHF FM RECEIVER MODULE OPERATING AND SERVICE MANUAL RITRON INC. 1 TABLE OF CONTENTS SECTIONTOPIC PAGE 1.DR-142 SPECIFICATIONS2 SUB-D 15 PIN CONNECTOR3 2.INTRODUCTION GENERAL4 Model Identification4 FCC ID4 Unauthorized Modifications4 MAINTENANCE INFORMATION4 Surface Mount Repairs4 Precautions for handling CMOS4 Synthesizer shield5 3.DESCRIPTION OF INPUT/OUTPUT6 4.PROGRAMMING THE RADIO7 PROGRAMMING THE RADIO USING A PC COMPUTER7 Programmable Features7 COMPUTER SOFTWARE COPYRIGHTS7 5.DR-142 THEORY OF OPERATION INTRODUCTION8 POWER SUPPLY AND VOLTAGE DISTRIBUTION8 REFERENCE OSCILLATOR8 SYNTHESIZER 8 RECEIVER9 Receiver Front End9 FM Receiver Subsystem9 Voice and Tone Conditioning9 MICROCONTROLLER10 6.DR-142 ALIGNMENT PROCEDURE RECOMMENDED TEST EQUIPMENT11 RADIO PREPARATION11 REFERENCE FREQUENCY11 RECEIVER FRONT END TUNNING11 RECEIVER SQUELCH12 2 DR-142 SPECIFICATIONS FCC ID:AIERIT17-142R FCC Rule Parts:15 Frequency Range:136-156 MHz or 154-174 MHz RF Channels:8 Independent RX frequencies Synthesizer Step Size:5 kHz Frequency Stability:+/-2.5 PPM (-30 to +50 C) Tone/Code Signaling:CTCSS (Quiet Call) and DCS Power Supply:8 to 15 VDC Battery Drain: RX Standby:20 mA at 13.8 VDC RX Receive:250 mA Dimensions:5”H x 3”W x 1.25”D Weight:3.8 oz. Antenna Fitting:None (customer supplied) 3 DR-142 SPECIFICATIONS Wide bandNarrow band 25 kHz 12.5 kHz Sensitivity (12 dB SINAD):0.25 μV0.25 μV Adjacent channel:-70 dB-60 dB Spurious rejection:-60 dB-60 dB Image rejection:-80 dB-80 dB Intermodulation:-65 dB-65 dB FM hum and noise:-45 dB-40 dB Conducted spurious:-57 dBm-57 dBm Receiver attack time: < 30 ms < 30 ms Noise squelch attack time: < 15 ms < 15 ms RSSI squelch attack time: < 5 ms< 5 ms RSSI squelch sensitivity:Manually adjustable; factory set for –108 dBm Noise squelch sensitivity:Manually adjustable; factory set for 20 dB SINAD @ 1.5 kHz deviation ( 3.0 kHz used for wideband) AUX OUT frequency response:6 - 3000 Hz @ +1 / -3 dB Audio Output>700 mW into 8 Ω, with less than 5 % THD Sub D 15 Pin Connector The DR-142 is equiped with a 15 pin female sub D connector with the following functions: Pin# Function 1 least significant channel select bit (CS0) 2 channel select 1 (CS1) 3 Most significant channel select (CS2) 4 N/A 5 N/A 6 + 8 to 15 VDC input 7 N/A 8 auxilary ouput 9 PC programing port 10 N/A 11 Auxilary monitor input (pull to ground to open squelch) 12 Speaker output 13 Carrier detect output (pulls to 5 VDC through 390 ohms) 14 N/A 15 ground INTRODUCTION 4 GENERAL RITRON's DR-142 receiver module is designed to operate in the VHF band. Two band splits are available, 136-156 MHz (low) or 154-174 MHz (high). The unit receives voice through a nominal 1 watt speaker output. It supports up to 9600 bps 4-level FSK through its auxiliary output port. Each radio can be “dealer or factory” programmed to contain a unique set of eight operating frequencies and options. When all three channel select inputs are tied to ground the radio operates on channel 1. The channel selection is done in a binary manner on the CS2, CS1 and CS0 inputs. Quiet Call (CTCSS) or Digital Quiet call (DCS) tones can be programmed per channel. Model Identification The DR-142 model, serial number and FCC Identification are displayed on a label located on the bottom of the PCB. FCC Label An FCC label must be visible on the unit as installed in its final configuration. If the unit is to be used as shipped from RITRON, this would be no problem since an FCC label is affixed to the bottom of the PC board. If the DR-142 is to be installed in an enclosure, the installer must ensure that either the FCC label on the unit is visible through a door, window or other opening, or add a label to the outside of the enclosure. If a label is to be added to the outside of the enclosure, the label must be of a type which is not easily removed or damaged and contains wording: Contains FCC ID: AIERIT17-142R. Unauthorized Modifications Note: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user’s authority to operate the equipment. MAINTENANCE INFORMATION Surface Mount Repair RITRON surface mount products require special equipment and servicing techniques. Improper servicing techniques can cause permanent damage to the printed circuit boards and/or components, which is not covered by RITRON’s warranty. If you are not completely familiar with surface mounted component repair techniques, RITRON recommends that you defer maintenance to qualified service personnel. Precautions for Handling CMOS Devices This radio contains complementary metal-oxide semiconductor (CMOS) devices, which require special handling techniques. CMOS circuits are susceptible to damage by electrostatic or high voltage charges. Damage can be latent, with no failure appearing until weeks or months later. For this reason, take special precautions any time you disassemble the radio. Follow the precautions below, which are even more critical in low humidity environments. 1)Storage/transport - CMOS devices that will be stored or transported must be placed in conductive material so that all exposed leads are shorted together. CMOS devices must not be inserted into conventional plastic “snow” or plastic trays of the type that are used for other semiconductors. 2)Grounding - All CMOS devices must be placed on a grounded bench surface. The technician that will work on the radio/CMOS circuit must be grounded before handling the radio. Normally, the technician wears a conductive wrist strap in series with a 100K Ohm resistor to ground. 3)Clothing - Do not wear nylon clothing while handling CMOS circuits. 4)Power off - Remove power before connecting, removing or soldering a PC board that contains CMOS devices. 5 5)Power/voltage transients - Do not insert or remove CMOS devices with power applied. Check all power supplies to be used for testing CMOS devices, making sur…

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

TYPE OF EXHIBIT: FUNCTIONAL BLOCK DIAGRAM FCC PART:2.1031 (5) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 7, 2003 The following block diagrams demonstrate the functional layout of the G and O band splits of the DR-142. 180 MHz LPF 136-156 MHz BPF LNA 136-156 MHz BPF JFET mixer Receive Synthesizer 43.65 MHz crystal filter IF AMP FM IF receiver IC 450 kHz IF ceramic filter 14.4 MHz Reference oscillator LO tripler 300 Hz active HPF De-emphasis (200 HZ LPF) 1 watt audio power amp Variable gain data amplifier Micro- controller SPEAKER_OUT AUX_OUT Antenna DR-142 G-BAND BLOCK DIAGRAM 450 kHz 43.2 MHz 43.65 MHz 136 – 156 MHz DC – 3 kHz 300 –3000 Hz 6 – 3000 Hz 179.65- 199.65 MHz 14.4 MHz 180 MHz LPF 154-174 MHz BPF LNA 154 -174 MHz BPF JFET mixer Receive Synthesizer 43.65 MHz crystal filter IF AMP FM IF receiver IC 450 kHz IF ceramic filter 14.4 MHz Reference oscillator LO tripler 300 Hz active HPF De-emphasis (200 HZ LPF) 1 watt audio power amp Variable gain data amplifier Micro- controller SPEAKER_OUT AUX_OUT Antenna DR-142 O-BAND BLOCK DIAGRAM 450 kHz 43.2 MHz 43.65 MHz 154 - 174 MHz DC – 3 kHz 300 –3000 Hz 6 – 3000 Hz 197.65- 217.65 MHz 14.4 MHz

RITRON, Inc. 505 West Carmel Dr. Carmel, IN 46032 Sid Sanders TIMCO Engineering Inc. 849 NW State Road 45 Newberry, FL 32669 November 20, 2003 Re: Modular Approval for Ritron’s DR-142 Receiver Dear Sid: Ritron is currently seeking modular approval for the DR-142 Receiver. This product is a PC Board based design without a case and is intended to be used inside OEM equipment. As you know, the FCC’s policy towards modular approvals is limited to Part 15 unlicensed transmitters and is contained in DA 00-1407, released June 26, 2000. Receivers and the receive portion of transceivers are not specifically addressed. If, for the purposes of this submission, we were to consider the EMI generating portions of our product as a transmitter, albeit at a very low power, I believe that the intent of the FCC’s policy document is being met. Taking each of the eight requirement for modular transmitter approvals in order: 1. “The modular transmitter must have its own shielding.” This is to make the module effectively enclosure independent with regards to spurious emissions and to prevent unwanted coupling into the host electronics. In our product, the EMI generating circuitry, specifically the local oscillator and switching power supply regulator are shielded with their own independent shields. In addition, shields exist on those components which would be most likely to radiate emissions. This includes the front-end resonator inductors and IF matching transformers. 2. “The modular transmitter must have buffered modulation/data inputs...” This is to insure that over- modulation cannot occur which could, in turn, lead to excessive occupied bandwidth. This requirement in not applicable in this product since no modulation takes place. 3. “The modular transmitter must have its own power supply regulation.” This makes the voltages supplied to the transmitter independent of the host power input. Our product has all of its supply voltages supplied via internal regulators. 4. “The modular transmitter must comply with the antenna requirements of Section 15.203...” This is to ensure that the radiated power cannot be different than that which was Certified. Receivers, in general, have never been limited via the approval process to the way an antenna may be connected and what types of antennas may be used. This is understandable considering that the antenna conducted limits for a receiver are typically 50-60 dB below that of unlicensed Part 15 transmitters. 5. “The modular transmitter must be tested for electromagnetic compatibility in a stand-alone configuration... it must comply with the AC line conducted requirements found in Section 15.207.” The test results shown in the submission were taken with the product in a stand-alone configuration. In addition, AC line conducted measurements were also taken and provided in the test report. 6. “The modular transmitter must be labeled 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.” Our product will have its own FCC ID number and label and, in addition, the following text appears in the users manual: An FCC label must be visible on the unit as installed in its final configuration. If the unit is to be used as shipped from RITRON, this would be no problem since an FCC label is affixed to the bottom of the PC board. If the DR-142 is to be installed in an enclosure, the installer must ensure that either the FCC label on the unit is visible through a door, window or other opening, or add a label to the outside of the enclosure. If a label is to be added to the outside of the enclosure, the label must be of a type which is not easily removed or damaged and contain wording: Contains FCC ID: AIERIT17-142R. 7. “The modular transmitter must comply with any specific rule or operating requirements applicable to the transmitter...” There are no specific rules or operating requirements applicable to this product. 8. “The modular transmitter must comply with any applicable RF exposure requirements.” The level of the radiated emissions is well below that which would require any type of RF exposure evaluation. At the 20 cm minimum separation distance expected for users of this product, the RF levels would be at least 70+ dB below current limits. Based upon the reasoning above, I feel that Ritron is justified in requesting a modular approval for this product. The intent of the FCC’s published requirements for modular transmitters is being met even though this product is only a receiver with RF levels many orders of magnitude lower than that found in transmitters. Regards, Sam L. Dulaney Chief Engineer Ritron, Inc.

TYPE OF EXHIBIT: PHOTOGRAGHS FCC PART:2.1033 (7) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 12, 2003 CONTENT: Included are pictures of the DR-142 showing top and bottom views of the PCB with no shields as well as a top view with shields. DR-142 PCB top DR-142 PCB bottom DR-142 PCB top without shields.

TYPE OF EXHIBIT: FCC LABEL FCC PART:2.926 per 15.19 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 17, 2003 The FCC label on the units will appear as follows. It will be placed on the bottom of the PCB. 1.5” FCC ID: AIERIT17-142R MODEL: DR-142-G0ND SN: B1234 This device complies with part 15 of the FCC Rules. Operation is subject .75” to the condition that this device does not cause harmful interference. RITRON INC. 1–800–USA-1-USA FCC ID label

TYPE OF EXHIBIT: PHOTOGRAGHS FCC PART:2.1033 (7) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 12, 2003 CONTENT: Included are pictures of the DR-142 showing top and bottom views of the PCB with no shields as well as a top view with shields. DR-142 PCB top DR-142 PCB bottom DR-142 PCB top without shields.

1 *************************************************************************************************************** DR-142 Test Results *************************************************************************************************************** MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 7, 2003 The following is a list of attached exhibits required by the Federal Communications Commission for the application to and grant of FCC Type Acceptance. FCC RulePage List of Test Equipment Used2.947 (d)pg 2 Required Measurements 2.1033 (c)(14) Radiated Spurious Emissions2.1053pg 3 Spurious Emissions at antenna terminal2.1051pg 5 Conducted limits2.1033pg 6 2 TYPE OF EXHIBIT: TEST EQUIPMENT LIST FCC PART:2.947 (d) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 7, 2003 The measured data in this report was obtained using one or more of the following pieces of equipment. The particular equipment used in any one test is detailed in the procedure for that test. ITEMMANUFACTURER MODEL NO.SERIAL NO. Communications Test SetHewlett-PackardHP8920A3352A03633 Spectrum AnalyzerHewlett-Packard8560E3720A02980 Spectrum AnalyzerHewlett-Packard8559A2010A06979 Power SupplyBK/Precision 1730263-023610 Log Periodic AntennaElectro-MetricsLPA-258-102 3 TYPE OF TEST:RADIATED SPURIOUS EMISSIONS FCC PART:2.1053 per 15.109 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Oct 24, 2003 PROCEDURE: Field strength of spurious radiation of the DR-142 was taken on the RITRON three meter test range using the substitution method. The following procedure was used. 1. The DTX-142 was programmed to receive at the middle of both band splits which is 146 MHz for the G-band radio and 164 MHz for the O-band radio. The units were powered by a BK Precision power supply at 15 VDC. 2.The DR-142 was then terminated at the antenna port with 50 ohm power load. 3.All field strength measurements were made with the Hewlett-Packard Model 8560E Spectrum Analyzer connected to the Electro-Metrics LPA-25 log periodic receive antenna with 25 feet of RG-55 cable. 5.For each emission, the height and polarization of the field strength measuring antenna and orientation of the DTX-142 were varied to find maximum field strength. 6. The worse case emissions levels were noted. 7. Calculations were then performed to confirm compliance with the FCC limits. A sample calculation is demonstrated below: SAMPLE CALCULATION: The electric field intensity 3 meters from the unit tested is related to the power at the spectrum analyzer as follows. E(dBuV/m)= AF + P(dBm) + 107 E(uV/m) = antilog10(E(dBuV/m)/20) Where: AF -The Antenna Factor for the LPA-25 Log Periodic antenna is 11.5 at 190 MHz. This includes cable loss. P(dBm) - spectrum analyzer reading in dBm For the G-band, spurious emission at 189.65 MHz, we have: E(dBuV/m) = 11.5 + (-83) + 107 = 35.5 E(uV/m) = antilog10(35.5/20) = 59.57 This result is well below the 150 uV/m required by the FCC. 4 TYPE OF TEST:RADIATED SPURIOUS EMISSIONS FCC PART:2.1053 per 15.109 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Oct 24, 2003 CALCULATION RESULT SUMMARY: ProgrammedEmissionsPolarizationSpectrumCalculatedCalculatedFCC limit ReceiveFrequencyMeasuredfieldfield FrequencyEmission (MHz)(MHz) (dBm)E(dBuV/m)E(uV/m)(EuV/m) G-band 146189.65Horz-8335.559.6150.0 Vert-7939.291.2150.0 O-band 164207.65Horz-9523.915.7150.0 Vert-8435.257.7150.0 5 TYPE OF TEST:CONDUCTED EMISSIONS AT ANTENNA FCC PART:2.1051per 15.111 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 7, 2003 PROCEDURE: The DR-142 was programmed for receiving mid-band frequencies in each of two sub-bands. Power was supplied to the DR-142 by a BK Precision Model 1730 Power Supply set to 15 VDC. A 3 foot coaxial cable connected the antenna receive port directly the HP8559A spectrum analyzer input. The following table summarizes the measurements for the two band splits. RESULTS SUMMARY: G-BAND ReceiveLocal OscMeasuredFCCFCC FrequencyFrequencyEmissionlimitlimitMargin (MHz)(MHz)(dBm)(nW)(dBm)(dB) 146189.65-652-57.08.0 O-BAND ReceiveLocal OscMeasuredFCCFCC FrequencyFrequencyEmissionlimitlimitMargin (MHz)(MHz)(dBm)(nW)(dBm)(dB) 164207.65-742-57.017.0 6 TYPE OF TEST:AC POWERLINE CONDUCTED EMISSIONS FCC PART:2.1033per 15.107 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 18, 2003 The DR-142 was powered by a RITRON RPS-1A power supply plugged into a line impedance stabilization network. The outputs were monitored by an HP8560E from 450 kHz to 30 MHz for signals exceeding the 250 microvolt FCC limit. The following calculation converts the 250 microvolt limit to a power limit in dBm, the units read by a spectrum analyzer. P= V 2 /R P(dBm) = 10 * log(P/.001) Where: P is power in watts V is voltage in volts R is the analyzer input impedance in ohms P = (.250 x 10 -6 )/50 = 1.25 x 10 -9 W P(dBm) = 10 log(1.25 x 10 -9 /.001) = -59 dBm The highest readings as seen in the following spectrum analyzer plots is –73.5 dBm. This gives the DR- 142 a 14.5 dB margin. 7 DR-142 AC hot side conducted emissions DR-142 AC ground side conducted emissions

1 *************************************************************************************************************** DR-142 Test Setup Photograghs *************************************************************************************************************** MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DR-142 TYPE OF UNIT:VHF-FM Receiver Module FCC ID:AIERIT17-142R DATE:Nov 18, 2003 TABLE OF CONTENTS: DR-142 on RITRON’s 3-meter antenna rangepg 2 Conducted emissions at antennapg 3 Line impedance stabilization unit on floor of AC powerline conducted test sitepg 4 DR-142 on table in AC powerline conducted test sitepg 5 2 DR-142 on RITRON’s 3 meter antenna range turntable 3 Conducted emissions at antenna 4 Line impedance stabilization network on floor of AC powerline conducted test site 5 DR-142 on table in AC powerline conducted test site 6