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APPENDIX A: CIRCUIT BOARD DIAGRAMS

369548.DOC

Page

19

Receiver – Bottom

Receiver Injection

INSTALL C22 AS SHOWN

THESE PADS (SIZE 0805)

ADD 1000pF ACCROSS

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Содержание IP8B

Страница 1: ...a at ti io on n P Pr ro od du uc ct t O Ow wn ne er r s s M Ma an nu ua al l Version Date September 29 2003 Document 516 80510 POM Version A Copyright 2003 IPMobileNet Inc 16842 Von Karman Avenue Suit...

Страница 2: ...and 2 this device must accept any interference including interference that may cause undesired operation of this device The following U S Patents apply to this product U S Patent numbers 5 640 695 6 0...

Страница 3: ...gth Indication Comparator 6 Baseband 7 Receiver Board 7 IF Amplifier 7 Receiver Injection 8 Exciter Board 8 Analog Modulation 9 Phase Locked Loop 9 Power Amplifier 10 SECTION 2 FACTORY TEST PROCEDURE...

Страница 4: ...of the following base station s data connectors RS232 Serial Port DB9 Data Connector RJ45 Ethernet 10 Base T Interface Connection System Controller Houses the modem diversity and Ethernet circuitry M...

Страница 5: ...y stable local oscillator signal for the three 3 receivers This displays a serial data input output interface synthesizer and VCO Transmitter Consists of an exciter and a power amplifier module coveri...

Страница 6: ...es 2K bits of pre programmed data storage for the CPU Data is clocked out of U3 by EECLK and back into the CPU via EEDATA A programming power supply is required for the flash RAM inside of the CPU and...

Страница 7: ...at DISC_ AUDIO The signal passes through resistor R56 and into the modem chip Resistor R55 and capacitor C46 serve as feedback elements limiting both the gain and bandwidth of an amplifier within U15...

Страница 8: ...r refer to schematic on page 45 The incoming 45 MHz signal passes through C15 C17 and R12 which provides impedance matching to the IF amplifier input U2 is a super heterodyne IF subsystem Inside the c...

Страница 9: ...t permits a slight shift in the reference frequency which enables the three 3 receivers to be tuned precisely to the assigned receive frequency A diode CR2 provides additional voltage regulation impro...

Страница 10: ...to the correct operating point It is generated by modem chip U14 on the System Controller Board Phase Locked Loop refer to schematic on page 53 This section displays phase locked loop PLL circuitry Th...

Страница 11: ...fier refer to schematic on page 40 The transmit injection signal from the RF injection section is applied to the high powered linear amplifier U1 one 1 watt amplifier The signal is then routed to the...

Страница 12: ...l ports and Microsoft Windows 95 or greater and IPMobileNet Dial Up Networking IPMessage software SLIP2IPMN exe and HyperTerminal for base station installed 2 Comm Test Set HP 8920A or B 3 High Freque...

Страница 13: ...unnel 0 TX format new Injection LOW SIDE 45MHz channel spacing 25000 Channel 0 Channel Tx freq Rx freq Inj freq Frequency 0 815 100000 860 100000 815 100000 Serial number yyyyyyyyy RIM address 1 Frequ...

Страница 14: ...e 3 receivers by monitoring the receivers R24 surface mount pad which lies on the 50 ohm track between P1 and C43 Step 2 Adjust R23 on the receiver injection circuit board to set the injection frequen...

Страница 15: ...RSSI1 low adjust potentiometer R10 for a reading of 0 750 VDC 10 mV Step 7 Increase the amplitude of the signal by 50 dBm Step 8 While monitoring TP2 with the digital multi meter adjust RSSI1 high ad...

Страница 16: ...stments are interactive therefore continue adjusting R71 for 350 mVRMS and R58 for 2 500 VDC until further adjustments are no longer required Step 19 Inject on frequency signal at a level of 80 dBm mo...

Страница 17: ...tment Step 5 Connect the base station to the IPNC Step 6 Using a calibrated mobile radio operating on the base station s channel adjust R30 for consistent data quality readings of 248 as observed on t...

Страница 18: ...SECTION 3 FCC LABEL 369548 DOC Page 17 IP8B Base Station FCC Label Placement LABEL IP8B Base Station FCC Label...

Страница 19: ...U18 U14 TP5 U10 C83 51 C56 50 16 R62 C84 75 76 32 U4 U16 U15 C8 C7 R31 ADD JUMPER 30 AWG INSULATED WIRE 73 U7 72 REWORK INSTRUCTION R33 TP4 TP8 F1 S1 26 100 R80 R65 R66 R79 C88 10 9 7 U21 8 U6 2 1 J5...

Страница 20: ...APPENDIX A CIRCUIT BOARD DIAGRAMS 369548 DOC Page 19 Receiver Bottom Receiver Injection INSTALL C22 AS SHOWN THESE PADS SIZE 0805 ADD 1000pF ACCROSS...

Страница 21: ...APPENDIX A CIRCUIT BOARD DIAGRAMS 369548 DOC Page 20 Exciter Top Exciter Bottom C44 C37 R30 C27 R34 R35 C46 C36 U5 C50 POLARITY C35 C29 R5 U1 R13 R8 R7 C5 C7 U3 R12 R3 C6 R6 C1 U2 R9 C4 C2 R17 C3...

Страница 22: ...APPENDIX A CIRCUIT BOARD DIAGRAMS 369548 DOC Page 21 Power Amplifier U3 FOR REF ONLY ON TOP OF C11 C14 TO BE MOUNTED C11 C14...

Страница 23: ...exact injection frequency 100 Hz P1 C39 5 1 dBm Receiver Diversity Reception Controller 1 2 3 Parameter Spec Receiver 1 Measured Receiver 2 Measured Receiver 3 Measured U2 Pin 4 10 to 5 dBm RSSI Test...

Страница 24: ...1400 character test message 500 Hz Transmit Modulation Deviation 5 3 kHz while transmitting 1400 character test message 5 1 kHz to 5 3 kHz Transmit Data Quality While transmitting 1400 character test...

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