O7KSD164UHF Data Transceiver - Transmitter

SD-164 Data Radio User Instruction Manual FCC RF Exposure Compliance Requirements - The Federal Communications Commission (FCC), with its action in General Docket 93-62, November 7, 1997, has adopted a safety standard for human exposure to Radio Frequency (RF) electromagnetic energy emitted by FCC regulated equipment. Topaz3 / Maxon subscribes to the same safety standard for the use of its products. Proper operation of this radio will result in user exposure far below the Occupational Safety and Health Act (OSHA) and Federal Communications Commission limits. Antennas used for this transmitter must not exceed an antenna gain of 7dBd. The radio must be used in config- urations with a maxim um operating duty factor not exceeding 50%, in typical push-to-talk configurations. This radio is approved for use by the general population in an uncontrol led environment. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 49cm from all persons, must not be co-located or operating in conjunction with asny other antenna or transmitter. CAUTION - DO NOT transmit for more than 50% of total radio use time (50% duty cycle). Transmitting more than 50% of the time can cause FCC RF exposure compliance requirements to be exceeded. The radio is transmitting when the “TX” icon on the radio display is illuminated. You can cause the radio to transmit by pressing the P-T-T button on the radio’s microphone. Users must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. NOTE: This radio operates in FCC regulated frequency bands. All radios must be licensed by the FCC before use. Because this radio contains a transmitter, Federal law prohibits unauthorized use or adjustments of this radio. This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Safety CAUTION - DO NOT operate the transmitter of any radio unless all RF connectors are secure and any open connectors are properly terminated. CAUTION - DO NOT operate the radio near electrical blasting caps or in an explosive atmosphere. CAUTION - All equipment must be properly grounded for safe operation. WARNING - DO NOT allow children to operate transmitter - equipped radio equipment. WARNING - All equipment should be serviced by a qualified technician. WARNING - It is mandatory that radio installations in vehicles fueled by liquefied petroleum gas conform to the following standard: National Fire Protection Association Standard NFPA 58 applies to radio installations in vehicles fueled by liquefied petroleum (LP) gas with LP gas container in the trunk or other sealed-off space within the interior of the vehicle. This standard requires that: 1. Any space containing radio equipment shall be isolated by a seal from the space in which the LP gas container and its fittings are located. 2. Remote (outside) filling connections shall be vented to the outside. 2 About your SD-164 Data Radio The SD-160 Series (hereinafter called “the radios”) of RF Link Modules from Topaz3 utilize the latest technology in their designs and manufacturing. SD-164 models are Phase Lock Loop Synthesizer (PLL) / microprocessor controlled and offer two (2) watts of power with 16-channel capability. Multiple functions including 1200 to 9600 baud rates, AC and/or DC audio coupling, GMSK, FFSK and FSK modulation are standard in these fully programmable wide bandwidth RF Link Module units. Programmable sub-audio squelch system (CTCSS & DCS) and two-tone squelch system are newly added to the signal level detect squelch system (RSSI). GPS Data handling is provided to interface and control internal GPS receiver. To assure satisfaction from the radio, we urge you to thoroughly read the operation and function information in this manual before operating your SD-164. Applications of some of the functions described in this manual are determined by the system you use. Your Topaz3 dealer will program your radio so that you have the greatest number of functions possible relative to your needs. Should you have questions regarding the operation of the radio, please consult your Topaz3 Dealer. 3 Specifications GENERAL Equipment Type ............................................................... Data radio Performance Specifications................................................TIA / EIA-603 Band .............................................................................. UHF Channel Spacings ............................................................ 25 kHz, 12.5 kHz programmable RF Output Power ............................................................ 2 watt only Modulation Type ............................................................ F2D, F3E Intermediate Frequency ................................................... 45.1 MHz & 455 kHz Number of Channels ......................................................... 16 Frequency Source ............................................................ Synthesizer Operation Rating ............................................................ Intermittent 90 : 5 : 5 (Standby: RX: TX) Power Supply .................................................................. Ext. Power Supply(12 VDC Nominal) 7.2V - 18.0V DC EXTREME Temperature Range Storage ........................................................................... from - 40°C to + 80°C Operating ........................................................................ from - 30°C to + 60°C Current Consumption Standby (Muted) ............................................................... < 65 mA Transmit 2 Watt RF power ................................................ < 1.0 A Frequency Bands: RX TX UHF : U2 450.000 - 490.000 MHz 450.000 - 490.000 MHz Lock Time ........................................................................< 10 mS TX to RX attack time .................................................…

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Correspondence Summary Questions and Answers June 3, 2003 SUBJECT: TOPAZ3, LLC - FCC ID: O7KSD-164 TCB Q-3: User’s Manual p8/22 - Part 90.203(e): Frequency programming capability: It does not say explicitly that the programming software and cable cannot be provided to the end-user. Please review accordingly or provide an attestation of compliance with this section. Applicant A-3: The manufacturer only provides the programming capability to the dealer – this information is NOT provided to the end user. TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 [email protected]

1 FCC ID LABEL Location

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1 BRIEF CIRCUIT DESCRIPTION INTRODUCTION The VHF and UHF radio comprise two PCBs (RF and digital PCB). These boards are connected by 18- pin female and male connector. The digital board which controls radio and data receiving and sending is interfaced with external data equipment through the 15-pin d-sub female (DB-15) connector. DIGITAL CIRCUITS The Digital circuit contains the CPU, the channel select switch, and associated digital circuits. TX-SIGNAL CIRCUIT Generally, there are two signal paths in the TX-signal circuit. One is FSK data signal path and the other is audio signal path. In case of FSK data signal from Pin 1 of DB-15 connector (CON401) goes through IC406-C. That is amplified by IC404-C and then its amplitude is limited by IC404-D. After that, this signal is filtered by 8th order low pass filter (IC405) in order to reduce the required transmission bandwidth. First one stages of 8th order LPF consist of Gaussian filter for the improvement of ramp function response and last three stages use Butterworth filter to have enough attenuation. The output of LPF is then fed to the RF board for TX modulation. Audio signal from Pin 7 of DB-15 connector is fed into the 300Hz High pass filter (IC408) through the IC406-B and IC409. HPF removes sub-audible voice products for application of Sub-audio (Tone) squelch system (CTCSS, DCS) and then the output from IC408 is fed into IC404-A&B with associated parts forming a mic amplifier and pre-emphasis circuit. After that, the pre-emphasized TX-audio signal is inputted to the RF board for TX modulation through FSK data signal path. RX-SIGNAL CIRCUIT The RX signal circuit also has two signal paths. One is data signal path and the other is audio signal path. The RX signal comes from the pin 10 of CON405 of Digital board connected with pin 10 of CON1 in RF board. In case of data signal, switched in IC406-D by Busy signal which is activated when radio receives valid RF signal, it is filtered by IC416-A and then its amplitude level is adjusted (amplified) by IC416-B. The amplitude-adjusted signal goes to pin 2 of DB-15 connector (CON401). In the meantime, audio signal is inputted to the 300Hz High pass filter (IC408) to eliminate sub-audible voice products via IC409. The output of HPF is switched by IC406-A and de-emphasized by resister R471 and C452. After that, its level is adjusted by RV401 and then amplified by IC412 (LM386: Audio 2 amplifier). The amplified signal flows into pin 9 of CON401 (DB-15). ANALOG SWITCH IC409 (MC14053B) is a digitally controlled analog switch which internally consists of three single poles and double throw switches. Besides, there are three control lines, A, B, and C set a high at 5V or low at 0V respectively. The A controls the X ports, the B controls the Y ports, and the C controls the Z ports. Example: A high on control A would connect X to X1.Alow on control A would connect X to X0. HIGH PASS FILTER The 300Hz high pass filter is an 8-pole 1dB Chebeyshev active filter that comprises IC410 and peripheral components. Received audio passes to IC408 from Pin 4 of IC409 where sub-audible tones below 300Hz are removed. TX (Mic)audio is also fed into IC408 via IC409 (Pin 4) where sub-audible voice products below 300Hz are also removed. CTCSS/DCS DECODE CIRCUITS Discriminated audio from Pin 9 of IC6 is fed into IC411-B and associated parts which are the first 2 poles part of a 6th order 250 Hz Chebeyshev low pass filter. The output from pin 1 (IC411-B) is fed into IC409 (Pin 2) and out at pin 15 (IC409). The output signal is then fed to Pin 8 on IC410 which is a 6th order low pass Butterworth switched capacitor filter. The output from the Butterworth filter (Pin 3 of IC410) is then fed to the remaining second 4 poles part of the 6th order Chebeyshev filter, which consist of IC411-D and one of the two internal operational amplifiers of IC410 (MSNBLPS) along with associated components. Both the Chebeyshev and the Butterworth filter are combined to make a 4dB ripple low pass filter when programmed for 250Hz. The output of IC411-D (Pin 14) is fed into the remaining internal operational amplifier of IC410 (MSNBLPS) which forms the squaring circuit for the signal decode. The signal is out from Pin 2 of IC411 (MSNBLPS) and fed into IC401 (MCU) where it is compared whether that is matched with a preprogrammed data or not. If matched, a valid data is decoded and shown by a green L.E.D. on the top panel of the SD-160 data radio, and audio is released through pin 9 of DB-15 Connector. If unmatched, the busy Yellow L.E.D. would be shown. CTCSS/DCS ENCODE CIRCUITS During TX encode, the tone squelch digital signal is produced as a 3-bit parallel word at Pins 33, 34, and 35 of the micro controller (IC401). The 3-bit digital signal is converted to an analog signal by resistors 3 R481, 482 and 483. The analog signal is fed into Pin 1of IC409 and out on Pin 15 (IC409) and again flowed into Pin 8 of IC410 (6th order Butterworth clock tuned low pass filter). The filtered encode output from Pin 3 (IC410) is fed to IC411-A and RV402 (sub-audible gain control), the output at IC411-A is then fed to the audio mixer circuit of RF board. TWO TONE DECODE CIRCUITS Two tone uses same frequency with audio. Discriminated audio from the RF board is inputted to the comparator (two tone decoder: IC403-B) which forms the squaring circuit for the decode signal. The signal is out from Pin 7 of IC403-B and fed into IC401 (MCU) where it is compared whether that is matched with a preprogrammed data or not. If matched, a valid data is decoded, which is shown by a green L.E.D. on the top panel of the SD-160 data radio and audio is released through pin 9 of DB-15 Connector. If unmatched, the busy Yellow L.E.D. would be shown. RSSI DETECTOR From the RF board, the RSSI (Received Signal Strength Indicator) signal flows to Pin 31 of IC401(MCU) through R513. Micro controller unit (IC401) detects received signal level using the inner 8-bit ADC(Analog to Digital Converter)…

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2 ALIGNMENT PROCEDURE The SD-164 UHF Transceiver have broad band covering range, UHF(450~490 MHz) and should require no special alignment, unless repairs are performed on the transceiver portion. Should repairs be necessary, use the "Test Equipment Diagram" and the Alignment Points Diagram", in conjunction with the following procedures: • An Extender Board is required in order to separate the Digital and RF PCB’s to allow access to the alignment points. Installation instructions are provided with the Extender Board Assembly. RECEIVER 1. Apply a standard test signal to the receiver antenna terminals. 2. Adjust RV401 for the specific audio output level. RX VCO RX VCO is pre-tuned at factory and no more adjustment is required To identify existence of defect of RX VCO, check the VCO Control voltage. 1. Set the unit to the highest receive frequency, 490MHz(UHF2), and check the VCO control voltage is below 10.0 volts. 2. Set the unit to the lowest receive frequency, 450MHz(UHF2), and check that the VCO control voltage is above 1.0 volts. • Note: Use TP1 to measure the voltage. TRANSMITTER Connect the unit to a Service Monitor with the power meter setting to the 10W scale (or auto range). TCXO Set the channel selector to the mid-range frequency 470MHz, adjust TCXO1 for a reading of 470MHz ±200Hz. TX VCO TX VCO is pre-tuned at factory and no more adjustment is required To identify existence of defect of TX VCO, check the VCO Control voltage. 1. Set the unit to the highest transmit frequency, 490MHz(UHF2), key the transmitter and check the VCO control voltage is below 10.0 volts. 2. Set the unit to the lowest transmit frequency, 450MHz(UHF2), key the transmitter and check that the VCO voltage is above 1.0 volts. • Note: use TP1 to measure the voltage. CTCSS, DCS & TX Deviation and Balance Adjustment 1a. Set the unit to a mid-frequency range and a CTCSS of 67Hz. Push PTT and adjust RV402 for desired CTCSS tone deviation. 1b. Switch to a channel with the same frequency and CTCSS of 250.3Hz. Push PTT and adjust RV1 to desired 3 CTCSS tone deviation, same as above step. 1c. Switch between the 67Hz channel and the 250.3Hz channel and adjust RV1 until the deviation is the same on both channels. It may be necessary to readjust RV402 to get the desired deviation. 2. Set the unit to a mid-frequency and input the TX data with 400 Hz standard audio level. 3. Increase the signal level to 20dB from standard level. 4. Monitor the demodulated signal from service monitor. Adjust RV1 to make the monitored signal to be a balanced square wave. 5. Reduce input signal to the standard level and adjust RV2 for the standard deviation. APC 1. Adjust RV4 for 2W Power 2. This completes the transmitter alignment procedures. 4 ALIGNMENT POINTS DIAGRAM RV4RV3 RV5 RV6 TCXO1 C208C308 RV1 RV2 RV402 RV401 SW401 TP1 RF BOARD ALIGNMENT POINTS DIGITAL BOARD ALIGNMENT POINTS 1 2 3 41 2 3 41 2 3 41 2 3 4 1 2 3 41 2 3 41 2 3 41 2 3 4 1 2 3 41 2 3 41 2 3 41 2 3 4 1 2 3 41 2 3 41 2 3 41 2 3 4 1 16 234 5678 9101112 151413 SW401 CHANNEL SELECT SWITCH CHANNEL NO. SWITCH POSITION

FCC RF Exposure Compliance Requirements - The Federal Communications Commission (FCC), with its action in General Docket 93-62, November 7, 1997, has adopted a safety standard for human exposure to Radio Frequency (RF) electromagnetic energy emitted by FCC regulated equipment. Topaz3 / Maxon subscribes to the same safety standard for the use of its products. Proper operation of this radio will result in user exposure far below the Occupational Safety and Health Act (OSHA) and Federal Communications Commission limits. Antennas used for this transmitter must not exceed an antenna gain of 7dBd. The radio must be used in config- urations with a maxim um operating duty factor not exceeding 50%, in typical push-to-talk configurations. This radio is approved for use by the general population in an uncontrol led environment. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 49cm from all persons, must not be co-located or operating in conjunction with asny other antenna or transmitter. CAUTION - DO NOT transmit for more than 50% of total radio use time (50% duty cycle). Transmitting more than 50% of the time can cause FCC RF exposure compliance requirements to be exceeded. The radio is transmitting when the “TX” icon on the radio display is illuminated. You can cause the radio to transmit by pressing the P-T-T button on the radio’s microphone. Users must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. NOTE: This radio operates in FCC regulated frequency bands. All radios must be licensed by the FCC before use. Because this radio contains a transmitter, Federal law prohibits unauthorized use or adjustments of this radio. This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Safety CAUTION - DO NOT operate the transmitter of any radio unless all RF connectors are secure and any open connectors are properly terminated. CAUTION - DO NOT operate the radio near electrical blasting caps or in an explosive atmosphere. CAUTION - All equipment must be properly grounded for safe operation. WARNING - DO NOT allow children to operate transmitter - equipped radio equipment. WARNING - All equipment should be serviced by a qualified technician. WARNING - It is mandatory that radio installations in vehicles fueled by liquefied petroleum gas conform to the following standard: National Fire Protection Association Standard NFPA 58 applies to radio installations in vehicles fueled by liquefied petroleum (LP) gas with LP gas container in the trunk or other sealed-off space within the interior of the vehicle. This standard requires that: 1. Any space containing radio equipment shall be isolated by a seal from the space in which the LP gas container and its fittings are located. 2. Remote (outside) filling connections shall be vented to the outside.

APPLICANT: TOPAZ3, LLC FCC ID: O7KSD164 REPORT #: T/Topaz3LLC_O7J\301UT3\301UT3TestReport.doc PAGE #: Table of Contents TABLE OF CONTENTS LIST FOR PART 90 UHF DEVICE APPLICANT: TOPAZ3, LLC FCC ID: O7KSD164 TEST REPORT: PAGE 1-2......COVER SHEET - GENERAL INFORMATION & TECHNICAL DESCR. PAGE 3........AUDIO FREQUENCY REPSONSE PAGE 4........MODULATION LIMITING PLOTS – 300 Hz PAGE 5........MODULATION LIMITING PLOTS – 1000 Hz PAGE 6........MODULATION LIMITING PLOTS - 2500 Hz PAGE 7........POST LIMITER PLOT PAGE 8........OCCUPIED BANDWIDTH PAGE 9........OCCUPIED BANDWIDTH PLOT – CW PAGE 10.......OCCUPIED BANDWIDTH PLOT – 4800 Hz DEVIATION PAGE 11.......OCCUPIED BANDWIDTH PLOT – 9600 Hz DEVIATION PAGE 12-13....SPURIOUS EMISSIONS AT ANTENNA TERMINALS PAGE 14.......METHOD OF MEASURING SPURIOUS EMISSIONS AT ANTENNA TERM. PAGE 15.......FIELD STRENGTH OF SPURIOUS EMISSIONS PAGE 16.......METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 17.......FREQUENCY STABILITY PAGE 18-19....TRANSIENT FREQUENCY STABILITY PAGE 20-21....TRANSIENT FREQUENCY STABILITY PLOTS PAGE 22.......MPE CALCULATION PAGE 23-25....TEST EQUIPMENT LIST EXHIBITS CONTAINING: EXHIBIT 1.........FCC ID LABEL SAMPLE AND SKETCH OF LOCATION EXHIBIT 2.........SCHEMATIC EXHIBIT 3.........BLOCK DIAGRAM EXHIBIT 4.........EXTERNAL PHOTOGRAPHS EXHIBIT 5.........INTERNAL PHOTOGRAPHS EXHIBIT 6.........USERS MANUAL EXHIBIT 7.........CIRCUIT DESCRIPTION EXHIBIT 8.........TUNING PROCEDURE EXHIBIT 9.........TEST SETUP PHOTOGRAPH EXHIBIT 10........PARTS LIST APPLICANT: TOPAZ3, LLC FCC ID: O7KSD164 REPORT #: T/Topaz3LLC_O7J\301UT3\301UT3TestReport.doc PAGE #: 1 of 25 GENERAL INFORMATION REQUIRED FOR TYPE ACCEPTANCE 2.1033 TOPAZ3, LLC will sell the (c)(1)(2) FCC ID: O7KSD164 UHF transceiver in quantity, for use under FCC RULES PART 90. 2.1033 (c) TECHNICAL DESCRIPTION 2.1033 (3) User Manual See Exhibit 14 2.1033 (c) TECHNICAL_DESCRIPTION 2.1033(c)(3) Instruction book. A draft copy of the instruction manual is included as EXHIBIT 6. 2.1033(c) (4) Type of Emission: 10K6F3E 90.209 Bn = 2M + 2DK M = 3000 D = 2300 Bn = 2(3000)+2(2300) = 10.6k 90.217(b) Authorized Bandwidth 11.25 kHz 2.1033(c) (4) Type of Emission: 11K25F2D 90.209 Bn = 2M + 2DK M = 9600 D = 825 Bn = 2(9600)+2(825) = 11.25k 90.217(b) Authorized Bandwidth 11.25 kHz 2.1033(c) (4) Type of Emission: 15K4F3E 90.209 Bn = 2M + 2DK M = 3000 D = 4200 Bn = 2(3000)+2(4200) = 6000+8400 = 15.4k 90.217(b) Authorized Bandwidth 11.25 kHz 2.1033 (5) Frequency Range: 450-490 MHz (6) Power Range and Controls: There are NO user Power controls. (7) Power Output shall not exceed 2.2Watts into a 50 ohm resistive load. APPLICANT: TOPAZ3, LLC FCC ID: O7KSD164 REPORT #: T/Topaz3LLC_O7J\301UT3\301UT3TestReport.doc PAGE #: 2 of 25 (8) DC Voltages and Current into Final Amplifier: POWER INPUT FINAL AMPLIFIER ONLY Frequency: 450.10 MHz Frequency: 470.00 MHz Frequency: 489.00 MHz Vce = 12 Volts Vce = 12 Volts Vce = 12 Volts IC = .570 A IC = .580 A IC = .580 A (9) Tune-up procedure. The tune-up procedure is given in EXHIBIT 8. 2.1033 (10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT 2. The block diagram is included as EXHIBIT 3. (11) Function of each electron tube or semiconductor device or other active circuit device: -SEE EXHIBIT 7. 2.1033(c)(11) A photograph or drawing of the equipment identification label is shown in Exhibit 1. 2.1033(c)(12) Photographs of the equipment of sufficient clarity to reveal equipment construction and layout and label location are shown in Exhibit 4-5. 2.1033(c)(13) For equipment employing digital modulation, a detail description of the modulation technique. This UUT uses FSK to modulate the transmitter. 2.1033(c)(14) data required for 2.1046 to 2.1057 See Below 2.1046(a) RF power output . RF power is measured by connecting a 50 ohm, Resistive wattmeter to the RF output connector. With a nominal battery voltage of 12 VDC, and the transmitter properly adjusted the RF output measures: OUTPUT POWER: HIGH – 2.2 Watts APPLICANT: TOPAZ3, LLC FCC ID: O7KSD164 REPORT #: T/Topaz3LLC_O7J\301UT3\301UT3TestReport.doc PAGE #: 3 of 25 2.1047(a)(b) Modulation characteristics : AUDIO FREQUENCY RESPONSE The audio frequency response was measured in accordance with TIA/EIA Specification 603. The audio frequency response curve is shown below. The audio signal was fed into a dummy microphone circuit and into the microphone connector. The input required to produce 30 percent modulation level was measured. Audio Frequency Response -6 -4 -2 0 2 4 6 8 10 100100010000 Frequency Hz Attenuation dB APPLICANT: TOPAZ3, LLC FCC ID: O7KSD164 REPORT #: T/Topaz3LLC_O7J\301UT3\301UT3TestReport.doc PAGE #: 4 of 25 2.1047(a)(b) Modulation characteristics 2.1047(b) Audio input versus modulation The audio input level needed for a particular per- percentage of modulation was measured in accor- dance with TIA/EIA Specification 603. The audio input curves versus modulation are shown in pages 6-8. Curves are provided for audio input frequencies of 300, 1000, and 2500 Hz. MODULATION LIMITING PLOT – 300 Hz – WIDE BAND Modulation Limiting 300 Hz 0 500 1000 1500 2000 2500 3000 3500 4000 4500 dBm dBm deviation deviation MODULATION LIMITING PLOT – 300 Hz – NARROW BAND 0 0.5 1 1.5 2 2.5 -90-80-70-60-50-40-30-20-10010 dBm Deviation APPLICANT: TOPAZ3, LLC FCC ID: O7KSD164 REPORT #: T/Topaz3LLC_O7J\301UT3\301UT3TestReport.doc PAGE #: 5 of 25 MODULATION LIMITING PLOT – 1000 Hz – NARROW BAND 0 0.5 1 1.5 2 2.5 -90-80-70-60-50-40-30-20-10010 dBm Deviation MODULATION LIMITING PLOT – 1000 Hz – WIDE BAND Modulation Limiting 1000 Hz 0 500 1000 1500 2000 2500 3000 3500 4000 4500 dBm dBm deviation deviation APPLICANT: TOPAZ3, LLC FCC ID: O7KSD164 REPORT #: T/Topaz3LLC_O7J\301UT3\301UT3TestReport.doc PAGE #: 6 of 25 MODULATION LIMITING PLOT – 2.5 k – NARROW BAND 0 5 10 15 20 25 30 -90-80-70-60-50-40-30-20-10010 dBm Deviation MODULATION LIMITING PLOT – 2.5 k – WIDE BAND Modulation Limiting 2500 Hz 0 500 1000 1500 2000 2500 3000 3500 4…

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