RNDDA579BWIRELESS HEADSET

2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation User’s Manual GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG DA579 USER GUIDE T T T o o o t t t a a a l l l l l l y y y W W W i i i r r r e e e l l l e e e s s s s s s ! ! ! ! ! ! D D D A A A 5 5 5 7 7 7 9 9 9 GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG DA579 USER GUIDE IMPORTANT SAFETY INSTRUCTIONS When using your Headset equipment, basic safety precautions should always be followed to reduce the risk of fire, electric shoc k, and injury to persons, including the following: 1. Read and understand all instructions. 2. Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning. 3. Do not use this product near water, for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement or n ear a swimming pool. 4. Do not place this product on an unstable cart, stand, or table. The product may fall, causing serious damage to the product. 5. This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the t ype of power supply to your home, consult your dealer or local power company. 6. To reduce the risk of electric shock, do not disassemble this product, but take it to a qualified service contractor when some service or repair work is required. Opening or removing covers may expose you to dangerous voltages or other risks. Incorrect reassembly c an cause electric shock when the appliance is subsequently used. 7. Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions: A. When the power supply cord or plug is damaged or frayed. B. If liquid has been spilled into the product. C. If the product has been exposed to rain or water. If the product does not operate normally by following the operating instructions, Adjust only those controls that are covered b y the operating instructions. Improper D. Adjustments of other controls may result in damage and will often require extensive work by a qualified technician to restore t he product to normal operation. E. If the product has been dropped or the cabinet has been damaged. F. If the product exhibits a distinctive change in performance. GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG DA579 USER GUIDE FCC NOTICE This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equ ipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communication. However, there is no guarantee that interference will not occur in a particular in stallation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipme nt off and on, the user is encouraged to try to correct the interference by one or more of the following measures : - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit difference from that to which the receiver is connected. - Consult the dealer of an experienced radio/TV technician for help. NOTE : The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipm ent. Such modifications could void the user's authority to operate the equipment. THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDERSIRED OPERATION. GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG DA579 USER GUIDE INSTALLATION PRECAUTIONS 1. Never install Headset wiring during a lightning storm. 2. Never install headset jacks in wet locations unless the jack is specifically designed for wet locations. 3. Use caution when installing or modifying headset lines. GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG DA579 USER GUIDE LOCATION OF CONTROL AND FEATURES 14.Power indicator 15.In-use/page indicator 16.Charge indicator 17.Page Button 18.Audio Button 6.Mute Button 23.Record jack 24.DC power Jack 25.Lifter Jack 26.Audio in Jack 27.Power adapter 28.Telephone cord 30.Recording cord (Option) 1.Hook On / Off 2. Power On / Off 3.RX Volume (+) 3-1. RX Volume (-) 5.LED On-line indicator 4.Charger 7.Headband 8.Ear Cushion 10.Head Cushion 11.Battery House 9.Speaker 12.Microphone 13.Charger spring 20.Configuration switch 19.TX Level 21.Handset Jack 22.Telephone Jack 31.Lifter (option) G 29.Audio cord for computer (Option) GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG DA579 USER GUIDE 1. DA579 Totally Wireless, extremely easy to use and very stylish, the DA579 will become an essential accessory. Connecting to your offi ce phone systems, the DA579 offers all the benefits of a mobile phone enabling office workers to walk to the photocopier, retrieve impor tant files or even make a coffee while still speaking on the phone. Please read this manual carefully that you can quickly learn the functions provided. 2.Feature & Overview 1. Hook button Answer & Making Call, remote handset lifter action 2. Headset Power switch To use the DA579 have to power on. If you are not using for long time, please turn off t…

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2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation Block Diagrams 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation DA579 Spread Spectrum Telephone System Architecture DA579 ASIC Block Diagram 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation DA579 CODEC Block Diagram DA579 RF Block Diagram

2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation BACKMI Corporation 2.4GHz DSS Digital Cordless Headset ( FOR FCC & CE APPROVAL ) 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation DA579 FCC Document Contents 1. General Description 2. Processing Gain Measurement 3. FCC Test Support Program Application Note 4. Frequency Table 5. Block Diagram 6. Schematics 7. Circuit Explanation 8. Parts List 9. PCB Layout 10. User’s Manual 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation General Description 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation Basic feature list
HIGH PERFORMANCE CONEXANT CHIPSET
BETTER VOICE QUALITY
40 CHANNEL RF OPERATION
16 MILLION AUTO-SECURITY CODE COMBINATION Base Unit feature list
INNER ANTENNA
IN-USE LED INDICATOR
CHARGE LED INDICATOR
POWER LED INDICATOR
PAGE BUTTON USED TO PAGE THE HANDSET PARTY AND TO STOP PAGING CHARGING CONTACT
AUDIO SELECT BUTTON
CONFIGULATION SWITCH
RECORD JACK
EXT. AUDIO JACK
LIFT JACK Handset feature list
INNER ANTENNA
AUTO ANSWER (WHEN PICJ UP THE HANDY DURING INCOMING RING)
AUTO STAND-BY
8 USER SELECTABLE VOLUME CONTROL
AUDIBLE AND led INDICATOR OUT OF RANGE WARNING
ANY KEY ANSWER
POWER SWITCH
TALK ON/OFF 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation Specification 1. REFERENCE SPECIFITION
Designed to conform to RF regulations FCC PART 15
Designed to conform to SAFETY regulations
POWER : 9V DC 300mA CLASS 2 TRANSFORMER WALL ADAPTOR PROVIDED
N T E R C O N N E C T I O N : RJ-11 JACK PROVIDED : DC JACK CORD PROVIDED
HAND SET VOLUME CONTROL RANGE : Min. 13 dB 2. GENERAL SPECIFICATION
FREQUNCY BANDWIDTH : 2403 ~ 2475MHz BAND WIDTH
NUMBER OF CHANNEL : 40 CHANNELS
CHANNEL SPACE : 1.8 MHz
SPEECH CODER : 32Kbps ADPCM with parity
TYPE OF RF MODULATION : DBPSK MODULATION / DEMODULATION
PROCESSING GAIN : 1 1 d B
DATA RATE : 80Kbps Time Division Duplex
FRAME TIME : 1ms Transmit / 1ms Receive
SAMPLE RATE : 1.92M SAMPLES/S ( 2 SAMPLES / CHIP )
TX POWER LEVELS(RF OUTPUT TERMINAL CONTACT) - HAND : 0dBm - BASE : 0dBm, -10Bm, -20dBm
RECEIVER SENSITIVITY : -102dBm, -82dBm
ADDTIONAL SECURITY : 2^24 SECURITY CODES
STANBY TIME : 1 4 d a y s
TALK TIME : 5 hours
BATTERY CAPACITY : 3.7 V DC/550mAh 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation 3. RF SPECIFICATION
POWER LINE CONDUCTED EMISSIONS : SECTION 15.207 PASSED (CLASS B REQUIREMENT)
B A N D W I D T H : SECTION 15.247( a ) PASSED ( 700KHz > 500KHz )
POWER OUTPUT : SECTION 15.247( b ) PASSED
SPURIOUS EMISSIONS(CONDUCTED) : SECTION 15.247( c ) PASSED AT BAND EDGES : 25.3dBc < 20dBc
S P U R I O U S E M I S S I O N S ( R A D I A T E D ) : SECTION 15.247( c ) PASSED PER SEC 15.209(30 - 960MHz) UP TO 10 th HARMONICS
P O W E R S P E C T R A L D E N S I T Y : SECTION 15.247( d ) PASSED (5.47dBm < 8dBm )
PROCESSING GAIN SECTION 15.247( e ) PASSED (11.2dB > 10dB ) 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation Processing Gain Measurement 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation Processing Gain Measurements for DA579 1. Scope This document details the results of measurement of the processing gain of a DCT DA579 phone with reference to the Code of Federal Regulations, Title 47, Chapter 1, Part 15 Radio Frequency Devices (FCC). FCC Federal Communications Commission SNR Signal to Noise Ratio JSR Jammer to Signal Ratio CW Continuous wave (jammer) HS Handset BS Base station DBPSK Differential Binary Phase Shift Keying Table 1. Abbreviations 2. An Overview of the Processing Gain Processing Gain Calculation Theoretical processing gain limit for the 12bit Spreading BPSK system is 10.8dB. Processing Gain Measurement Method Following method is specified by the FCC to measure processing gain. The detailed are in FCC documents 15.247 (e)(1). This involves transmitting a CW jammer in the RF passband of the system and measuring the jammer to signal ratio (JSR) required to achieve a certain bit error rate. The choice of the actual value of the bit error rate is left up to the tester. The jammer is stepped in 50 kHz increments across the entire passband and in each case the JSR to achieve the desired bit error rate is measured. The JSR is measured at the RF input to the system under test. The lowest 20% of the JSR data (in dB) are discarded. The processing gain can then be calculated as follows: - system measuredtheory p L S J N S G+       +       = where G p is the processing gain, the SNR is that theoretically predicted for the system under the test to achieve the desired bit error rate, the JSR is the lowest value (in dB) in the remaining data set and L sys adjusts for non-ideal system losses. L sys can not be greater than 2 dB. 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation 3. Processing Gain Measurement Test Setup The following parameters were used in the test setup. HS Tx power (dBm) -1.9 BS LNA gain (dB) 0 Channel attenuation (dB) -50 Test system losses (signal) (dB) -11.75 -4.05 dB (system), -6 dB (signal combiner), -1.7 dB (2 cables) Test system losses (jammer) (dB) -12.85 -12 dB (signal combiner), -0.85 dB (cable) Table 2. Test Setup Parameters Signal Combiner -6 dB cable (-0.85 dB) RF Attenuator (-50 dB) cable (-0.85 dB) RF Signal generator (HP8663A) -12 dB cable (-0.85 dB) additional system loss (-4.05 dB) (voice signal only) 2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation 4. Results & Calculation The following measurement results were taken at the base station. The desired bit error rate was set at 10 -3 . Jammer Frequency (MHz) BER (BS) Received jammer power (dBm) Received signal power (dBm) Jammer/Signal ratio (dB) 2404.8 9.4 ×10 -4 -59.55 -63.65 4.1 2406.6 9.6 ×10 -4 -57.95 -63.65 5.7 24…

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2.4GHz DSS DIGITAL CORDLESS HEADSET MODEL : DA579 USA VERSION BACKMI Corporation Schematics AA BB CC DD EE 5 5 4 4 3 3 2 2 1 1 303 mil long 84 ohm 4.0 deg MS10 97 ohm 52.6 deg 96 R 22.3 deg W=18.0 mil L=170 mil25.5 mil wide MS2 401 mil long 30 mil long 79 ohm 52.0 deg 17.5 mil wide96 R 22.3 deg W=18.0 mil L=170 mil 389 mil long 25.5 mil wide MS3 84 ohm 29.0 deg84 ohm 90.0 deg MS5 30.0 mil wide 219 mil long660 mil long MS6MS9MS1 84 ohm 40.0 deg 25.5 mil wide MS4 25.5 mil wide DRND BY A4 DRN DATE 1 OF 2 REV MODEL SIZE 2003.10.22 SHEET 2.0 DRN NO. APPD BYCHCK BY DASAN ELECTRO MicroSt rip Zo E(deg) W(mils) L(mils) MicroStrip W(mils) L(mils) Z0 / E(deg) MS1 MS5 MS3 MS2 MS6 TX SHIELD AREA MS4 DA579 BASE RFPOWER AMP MS9 MS10 RF RF RF RF RF RF RF RF RF RF RFRFRF RF RF RFRF RF RF RF RF RF RF VCC RFRFRF RF RF VCC RF C945102 12 TP6 C8018.2pf L805OPEN 1 2 L8030.5pF L80210nH R8021k 1 2 L80110nH C80812pF 12 C81712pf 1 2 L80410nH U801 RF110 123456789 10 12131415161718192011 PAOUT+FLAGVCCNCNCVCCTXENVCCFLAGPAIN+ FLAG GNDGNDGNDGNDGNDGND FLAG PAOUT- PAIN- C8031.0pf C81512pf 1 2 2450MHzBPF FL801 DWF2R2442G01 1 2 3 4 ANTENNA 1 C8201.2pf 12 C8128.2pf 12 C8148.2pf C82212pF C8058.2pf C804open 1 2 U802SW-437 3 2 16 5 4 OUT2 GND OUT1Vct1 IN Vct2 C8181.5pf 12 C8118.2pf R803 1k 1 2 R80110 R804 10 C8108.2pf C809102 C8138.2pf 12 C802102 C806102 C81612pf 1 2 C819open 12 C82112pF C80012pf 1 2 TXEN RXEN PAIN+ LNAIN PAIN- AA BB CC DD EE 5 5 4 4 3 3 2 2 1 1 DA579 BASE RF TRANSCEIVER DRND BY A4 DRN DATE 2 OF 2 REV MODEL SIZE 2003.10.22 SHEET 0 DRN NO. APPD BYCHCK BY DASAN ELECTRO VCOSHIELDAREA VCO-VCO+ RF RF RF RF RF RF RF RF RF RF RF VREG RF RF RF RF RF RF RF RF RF RF VCC VCC VCC RF RF RF RF RF RF RF RF VCC RF RF RF RFRF RF RF RF RF RF RF RF RF RF RF RF RF RF RF RFRF RF RF VREG RF RF RF RF VCC RF RF RF RF RF RF RF R92222K 12 C946102 12 C948102 12 C947102 12 C9508.2pf 12 C9498.2pf 12 C913823 1 2 C912823 1 2 R90210 1 2 C920 152 1 2 C916473 12 C922103 12 C909103 1 2 R91710.0 1 2 C924 821 12 C9238.2pf 12 L901 82UH 1 2 R919390 12 + C905TAN 22uf PN R916 820 12 R9203.3K 1 2 C902473 12 R90110.0 12 C925821 12 C9038.2pf 12 C9191.0pf 12 R918390 12 C915 473 12 C917222 12 R914470 1 2 C9181.8pf 1 2 C907563 12 C9018.2pf 12 C906102 12 C904103 12 TP2 TP3 TP1 TP4 TP5 R92151K 12 R90310k 1 2 C908391 1 2 C921 152 1 2 U902 TK11230M 132 546 CTRLBYPGND1 GND2 OUTVCC R9151.2K 12 TP7 C930 473 12 + C929TAN 4.7uf PN C9428.2pf 12 C9418.2pf 12 C9378.2pf 12 C9328.2pf 12 C9338.2pf 12 C934102 12 C9358.2pf 12 C9368.2pf 12 C931102 12 C9388.2pf 12 C940 8.2pf 12 C939 8.2pf 12 C944102 12 C9438.2pf 12 R92322K 12 R90791 12 R90991 12 C926331 12 C9148.2pf 12 U903 SV0706-2450R3V 100M M G1 PB G3 C G2 G4 NC GND OUTVCC GND TUNE GND GND R90510k 1 2 R90610 12 R908 75 1 2 C928102 1 2 C9278.2pf 1 2 U905 LDB15C101A2400 654 321 NCGNDOUT OUT GND INPUT R904100 12 C91112pf 1 2 RF109 TQFP48EP Jan 20, 1999 U901 2345689 1011 20 15 16 18 19 13 21 22 23 24 14 25262728293132333435 38 44 45 46 47 1 12 30 39 43 7 17 36 37 40 41 42 48 CLKFREFDATATXD2VCCMIXTXD1RXENALNAATTENLNAIN MODR RFOUT RFOUT TXENA MIXBPC GMC_RES PS1 PS2 GCREF GC GNDSHIELD VCCBBAMP BBOUTQ BBOUTQ BBOUTI BBOUTI VCCBB SERVOQ SERVOQ SERVOI SERVOI VCO VCCVCOBUF VCCSYN SYNTHENA LOADENA NC1NC2 GNDBB VCO CHPO VCCLNA LNADUMP NC3 NC4 NC5 NC6 NC7 NC8 C91012pf 1 2 TXDATA LNAIN RXEN SYNDATA REFOSCSYSCLKSYSSTBSYNEN PAIN+PAIN- TXENRXQPRXQNTXPWR1TXPWR0RXIPRXINAGC LNAATTN



    
    
    
     
     
      
    
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