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Содержание EAS 930A

Страница 1: ...www SteamPoweredRadio Com _ INCORPORATED OD L EAS 930A U ODULE REC V R R S G ID TFT INCORPORATED 1953 CONCOURSE DRIVE SA JOSE CA 95131 1708 ...

Страница 2: ...www SteamPoweredRadio Com MODEL 930A MULTI M1 O ULE RECEIVER USER S GUIDE C 1953 Concour Dnve an Jo A 95 31 1708 408 943 9323 J X 408 432 9218 ttp i w o ___ ...

Страница 3: ...quencies 3 1 3 3 I Selection of AM Receiver Frequency 3 1 3 3 2 Selection ofFM Receiver Frequency 3 1 3 3 3 Selection of NOAA Weather Radio Receiver Frequency 3 2 3 4 Pre Installation Checkout of the EAS 930A 3 2 3 4 1 AM Receiver Checks 3 2 3 4 2 FM Receiver Checks 3 2 3 4 3 NOAA WeatherRadio Receiver Check 3 2 CHAPTER 4 INSTALLATION AND OPERATION 4 1 Introduction 4 1 4 2 Model EAS 930A System In...

Страница 4: ...ce Checks 6 1 6 2 1 AM Receiver Sensitivity Check 6 1 6 2 2 AM Receiver AGC Range Check 6 2 6 2 3 AM Receiver Audio Output Adjustment 6 2 6 3 FM Receiver Performance Checks 6 2 6 3 l FM Receiver Sensitivity Check 6 2 6 3 2 FM Receiver AGC Range Check 6 3 6 3 3 FM Receiver Audio Output Adjustment 6 3 6 4 NOAA Weather Radio Receiver Performance Checks 6 4 6 4 I NOAA Weather Radio Receiver Sensitivit...

Страница 5: ...onnections 4 1 4 2 RF Receiver RSSI vs RF Input 4 2 4 3 NOAA Receiver RSSI vs RF Input 4 2 4 4 AM Receiver RSSI vs RF Input 4 2 4 5 Receiver Kit Installation Diagram 4 5 5 1 EAS 930A Multi Module Receiver Basic Block Diagram 5 1 5 2 AM Receiver Module Block Diagraxn 5 3 5 3 FM ReceiverModule Block Diagraxn 5 4 5 4 NOAA Weather Receiver Module Block Diagram 5 5 5 5 Speaker Amp Power Supply Board Si...

Страница 6: ...Receiver Board PCB Assy 6608 4038 A 5 FM Receiver Board Schematic 6601 4037 A 6 FM Receiver Board PCB Assy 6608 4037 A 7 NOAA WeatherRadio Receiver Board Schematic 6601 4039 A 8 NOAA Weather Radio Receiver Board PCB Assy 6608 4039 APPENDIX B PARTS LIST B 1 Speaker Amplifier Power Supply Board Assembly 6608 4026 B 2 AM Receiver Board Assembly 6608 4038 B 3 FM Receiver Board Assembly 6608 4037 B 4 N...

Страница 7: ... rear panel controls indicators and connectors and a description ofaccessory items Chapter 3 contains instructions for selection of receiver operating frequencies and pre installation checkout procedures Chapter 4 contains instructions for installation of antennas and connections to the Model EAS 930A It also describers the field installation ofthe receiver modules when required Chapter 5 describe...

Страница 8: ...scillator It is tunable across the AM broadcast band from 540 to 1720 kHz in 10 kHz increments via a 3 digit front panel rotary switch The NOAA Weather Radio Receiver module is a dual conversion FM narrow band receiver It is tunable from 162 40 to 162 55 MHz in 25 kHz increments via a single digit front panel rotary switch All three receivers are provided in the standard EAS 930A equipment A fourt...

Страница 9: ... AM loop antenna supplied 20 µV for 20 dB SIN 45 dB 10 dBm to 3 dBm adjustable from rear panel 6000 balanced 3 pin terminal block Less than 3 at 66 6 modulation WEATHER RADIO RECEIVER MODULE Continued Sensitivity Image Rejection l F Rejection Modulation Antennna Audio Output T H D 1 5 µV for 20 dB quieting 60 dB 70 dB FM t 5 kHz deviation 750 type F connector 10 dBm to 3 dBm adjustable from rear p...

Страница 10: ...amination by the factory if any EAS911 Equipment is found to be defective the unit will be repaired and returned to the BUYER with transportation charges prepaid by TFT during the warranty period Transportation charges for the units found to be defective within the first 30 days of the warranty period will be paid both ways by TFT Transportation charges for warranty returns wherein failure is foun...

Страница 11: ...le a claim with the transportation company or if insured separately with the insurance company 2 2 Front Panel Controls and Indicators Receiver front panel controls and indicators are shown in Figure 2 1 Numbered items in this figure are explained in Table 2 1 2 01 00 0 0 0 0 00 I oc 0 o 0oc c 0 D rn EAS930A ITEM 1 2 VOLUME 3 AUDIO 3 4 s 6 7 _ r l T T T 0 T l D Figure 2 1 Receiver Front Panel Cont...

Страница 12: ...ED Flashes when an RF signal is detected which is above the minimum level of 20 µV and has audio modulation Test point for RF Signal Strength Indication RSSI monitoring Rotary switches for setting receive frequency LocaVDistant switch for setting receiver sensitivity Receiver module for FM broadcast band 88 108 MHz RF AUDIO Figure 2 3 FM Receiver Module Edge Mounted Controls and Indicators Yellow ...

Страница 13: ... ff Q ft v u t a Vtd l0 4 66n666 I l J Figure 2 5 Receiver Rear Panel Controls and Connectors Table 2 2 Receiver Rear Panel Controls and Connectors ITEM TITLE FUNCTION 1 RECEIVER4 Controls and connectors for Receiver 4 I j j t r 111 Ii 01 __ RF INPUT Type F connector tor RF input to the FM and Weather receiver modules 2 pin terminal block connector for RF input to the AM Receiver module AUDIO BACK...

Страница 14: ...to either the or terminal Controls and connectors for Receiver 3 2 RECEIVERS Functions of these items are identical to those for Receiver 4 Controls and connectors for Receiver 2 3 RECEIVER2 Functions of these items are identical to those for Receiver 4 Controls and connectors for Receiver 1 4 RECEIVER 1 Functions of these items are identical to those for Receiver 4 5 120VAC 1 4A SB 60 Hz Prime po...

Страница 15: ... by this switch is routed to the internal speaker amplifier for local monitoring 3 3 Selection of Receiver Operating Frequencies Each receiver module has one or more rotary switches for setting its operating frequency These switches are shown in Figures 3 1 thru 3 3 and are accessible by removing the receiver s front panel access plate push on cover See Item 3 ofTable 2 1 for push on cover removal...

Страница 16: ...vities are weather related according to the FCC 3 4 Pre Installation Checkout of the EAS 930A It is recommended that a bench test of the EAS 930A Receiver be performed before final installation This will verify that the unit has not been damaged in shipment 3 4 1 AM Receiver Checks Connect the loop antenna to the antenna input at the rear panel of the AM Receiver Check for audio output from the sp...

Страница 17: ...lexandria 3 Kodiak 1 Stefling 2 Pocatello 1 Baton Rouge 2 Nome 1 Connecticut TwinFalls 2 Buras 3 Haines 1 Hartford 3 Illinois Lafayette 1 Seward 1 Meriden 2 Champaign 1 Lake Charles 2 Sitka 1 New London 1 Chicago 1 Monroe 1 Valdez 1 Delaware Marion 4 Molgan City 3 Wrangell 2 Lewes Molile 1 New 0 1eans 1 Yakutat 2 Oistriet of Columbia Peoria 3 Shreveport 2 Arizona Washington D C Rockford 3 Maine Fl...

Страница 18: ...hage 1 Bismalt k 2 Sioux Falls 2 Hinton 4 Kansas City 1 Dickinson 2 Moorefield 7 St Joseph 2 Fargo 2 Tennessee Spencer 6 St Louis 1 Bristol 1 Sutton 5 Jamestown 2 Chattanooga 1 Sikeston 2 2 Springfield 2 Minot Cookeville 2 Wisconsin Petersburg 2 Jac lcson 1 La Crosse P 1 Montana Wilism 2 Knaxvile 3 Green Bay 1 1 Ohio Memphis 3 Madison 1 Butte 1 Akron 2 Nashville 1 Menomonie 2 Glasgow 1 Cambridge 3...

Страница 19: ...puts If the receivers are to be used in a hot standby configuration the AUTO SWITCH strap on the receiver must be placed in the ON position Remove the top cover of the EAS 930A to gain access to this strap on the module On the rear panel of the EAS 930A connect the AUDIO BACKUP OUTPUT of the backup receiver to the AUDIO BACKUP INPUT ofthe primary receiver If the primary receiver loses RF or modula...

Страница 20: ...na approximately 250 ft can be used with good results One end of the long wire should be connected at the rear panel AM Receiver module s RF INPUT 4 5 Received Signal Strength Indication RSSI Test Point TPl located next to the frequency selection switches on each receiver module is the RSSI voltage of the receiver The characteristics of the RSSI vs the RF signal level at the input of the receiver ...

Страница 21: ...Make sure that the RF AUDIO LED aligns with the corresponding RF AUDIO hole in the front panel d Set the jumper to JW4 e To connect the AM receiver module to the adjacent PC board gently insert the 12 pin ribbon cable to 14 on the AM receiver module and JS on the adjacent PC board f Apply the label sticker to the appropriate location on the front panel g Connect the AM loop antenna to the RF INPUT...

Страница 22: ...WITCH strap to the ON position J Install the EAS 930A top cover and power cord The EAS 930A with the newly installed FM receiver module is ready for use 4 6 3 Weatber Radio Receiver Kit Installation Procedure 4 4 a Unplug the power cord from the EAS 930A b Remove the EAS 930A top cover the cover plate in the rear panel and the push cover in the front panel c Install the Weather Receiver module ont...

Страница 23: ...nstall the EAS 930A top cover and power cord The EAS 930A with the newly installed Weather Radio receiver module is ready for use f f RECEIVER BOARD TO BE INSTALLED i Figure 4 5 Receiver Kit Installation Diagram RECEIVER LABEL 4 5 ...

Страница 24: ...t from one receiver to be amplified and fed to the front panel speaker for monitoring The power supply board furnishes DC power for receiver board operation The receivers can be connected in a hot standby configuration by connecting the unbalanced AUDIO OUT of the backup receiver to the unbalanced AUDIO IN of the primary receiver If the primary receiver loses RF or modulation the backup receiver w...

Страница 25: ...TCH strap not shown is in the ON position the backup audio will be amplified by U2 for output If the AUTO SWITCH strap is in the OFF position the primary receiver audio will routed to U2 for output c The selected audio signal is amplified by U2 and sent to the BALANCED AUDIO OUTPUT terminal block connector on the rear panel The audio output level of U2 can be adjusted by using potentiometer R 10 w...

Страница 26: ...Appendix A for the schematic diagram The following is a summary of the operating principles of this module a The FM Receiver module receives 88 to 108 MHz FM program signals at its rear panel RF INPUT connector The RF signal is routed to front end block Ul consisting of a mixer a voltage controlled oscillator VCO a 10 7 1v11 lz IF filter and an FM Detector and other components b The detected audio...

Страница 27: ...ure 5 3 FM Receiver Module Block Diagram 5 5 NOAA Weather Receiver Module Block Diagram Description The NOAA Weather Receiver module is tunable narrow band FM Receiver that covers all seven weather channels Audio output for external use is balanced 600Q at up to 3 dBm Tuning is via a position rotary switch which is accessible by removing the associated front panel cover plate An LED lights to show...

Страница 28: ...d the AUTO SWITCH strap not shown is in the ON position the backup audio will be amplified by U6 for output If the AUTO SWITCH strap is in the OFF position the receiver audio will routed to U6 for output The audio output from the FM detector can be adjusted via potentiometer R30 which is accessible from the rear panel f Frequency selection is via a single digit BCD rotary DIP switch along with mic...

Страница 29: ...d audio is amplified by audio amplifier U4 The amplified audio signal is fed to a front panel speaker for monitoring The audio output level is adjustable via potentiometer R3 which is accessible from the front panel b The 115V AC prime power input at J1 is routed to the primary ofTl From the secondary of transformer T l The output at the secondary of Tl is applied to bridge rectifier Ul which prod...

Страница 30: ...sitivity and AGC range should be checked periodically The following paragraphs discuss the procedures for making these checks using the equipment listed in Paragraph 5 1 above 6 2 1 AM Receiver Sensitivity Check To check the AM Receiver sensitivity proceed as follows a Connect an RF signal generator to the AM receiver s RF IN connector part ofFigure 3 3 5 Item 3 on the EAS 930A rear panel b Set th...

Страница 31: ...switch to the LOCAL position then increase the signal generator level to 30 mV The 1kHz sine wave on the oscilloscope should remain undistorted d Repeat steps a and b above for 1000 kHz and 1600 kHz input signals 6 2 3 AM Receiver Audio Output Adjust To adjust the AM Receiver audio output proceed as follows a Connect a 600Q load and the balanced input terminals ofa distortion analyzer to the AM re...

Страница 32: ... 6 3 2 FM Receiver AGC Range Check To check the Receiver AGC range proceed as follows a Ensure that a signal generator is connected to the RF INPUT connector on the FM Receiver board rear panel b Using the 3 digit BCD rotary DIP switch on the front panel set the FM Receiver to 100MHz c Set the signal generator output frequency to 100 MHz and the frequency deviation to 75 kHz at a 1 kHz modulating ...

Страница 33: ... set the distortion analyzer to OdB and turn off the modulation Read the meter The difference in the readings with modulation on and with it offshould be greater than 20 dB g Turn on the modulation Observe the oscilloscope The waveform should still be present on the scope h Set the signal generator output level to 1µV 1 Connect a multimeter to TP1 RSSI on the front panel J Slowly increase the RF l...

Страница 34: ... The intent of this troubleshootding guide is to provide voltage levels and or waveforms to enable a person with RF experience and proper test equipment to perform repair work by isolating the defective section s in the Receiver 6 5 1 AM Receiver Module Setup Conditions 1 Channel Select switches at l00 2 RF Frequency 1000 kHz Mod 66 Tone 1 kHz Level 100 µV 3 DX LOCAL switch to DX position Table 6 ...

Страница 35: ...5 3 NOAA Weather Receiver Module Setup Conditions 1 Channel Select switch at 6 LEVEL WAVEFORM DC DC V V v 2 RF Frequency 162 5 MHz Mod 5 kHz Tone 1 kHz Level 5 µV 3 DX LOCAL switch to DX position Table 6 3 NOAA Weather Receiver Test Point Data TEST POINT DESCRIPTION LEVEL WAVEFORM TP1 RSSI 6 7 V DC TP2 Second IF 0 5 Vp p V TP3 Demodulated Audio 0 5 Vp p V TP4 2nd LO Output to µprocess 3 Vp p V TP5...

Страница 36: ...Speaker Amp Power Supply Board PCB Assy 6608 4026 E A 3 AM Receiver Board Schematic 6601 4038 B A 4 AM Receiver Board PCB Assy 6608 4038 C A 5 FM Receiver Board Schematic 6601 4037 B A 6 FM Receiver Board PCB Assy 6608 4037 B A 7 NOAA Weather Radio Receiver Board Schematic 6601 4039 B A 8 NOAA Weather Radio Receiver Board PCB Assy 6608 4039 B ...

Страница 37: ...2Vp p I 0 OFF TI SW I F Pl Cl JJ00p I 1 75 I II c _ 1 1 1 I I _ 1500 818 1 115 _I SK AUDIO OUT ADJ l P l Ul HBISI CIS 170 RJ 10K Cl6 01 I Rl I 0 IW CG R2 1 10 l 2W l CJ0 11 10V JJ 6 I JJ 1 OUTPUT S TO 4 170 8 OHM Cli t l AUDIO YLM386N I JJ 2 a SPEAKER Cl 7 l I 10V J2 COT T 1 7 0 L J I TO 1 GND IAECEIVERI U3 SV 10T 05 SV I I I I c 12 L c13 170T I ...

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Страница 42: ... l 6 If llS c23A8 A 06 tJ AG CS C22 o R 5 9 l R35 CR I oPf f Jr U6 Kl vu U5 u cfl R 31 tJ R23 fl lilm w i2 0 EJ R21 IP1 QI IJ ses i 1 i J 135 TP2 APPROVALS DATE REVISIONS DATE 6 1 1 96 7 1 96 ll C J2 AUOIO Ur OUT U l v s ID uu l JI I ANT IN APPAOUED CJ filCJ 3090 OAKMEAO VILLAGE DR Cl SRNIR CLARA CR 95051 I I lonAUN Jo RNN I 7 B 96 Ill l l1N t t0B 727 7272 ru c 910 3JB 05B t CHECKED EAS930 5102 39...

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Страница 44: ... lfu L________ R u am _J CN 18 j m _ r s1 rr r cs j IT 12 C1J OC29 05 0 j tJ J2 IJEATHER RECEIVER B l 7 _ S DD l F cs J J JP R72 r m OC67 i o ll JI iflf 1600 1039 fr N _ __ _ u 2 u u 1 o I G CJ a1 en c ss 0 0 0 0 0 0 R o c 0 0 0 lfEI lilll JPS __ 1_____ a 2 1 n J ASS QI 1 JS m 0 i SW J7is61 U J r LS V lllJJ C51 RN IN APPROUED I CJ1fi CJ 3090 Of1 11EAO VILLAGE OR 0 SANTA CLAllA CA 95051 I lonAWI Jo...

Страница 45: ... B Parts List Figure Title Dwg No Rev B 1 Speaker Amplifier Power Supply Board Assembly 6608 4026 C B 2 AM Receiver Board Assembly 6608 4038 C B 3 FM Receiver Board Assembly 6608 4037 B B 4 NOAA Weather Radio Board Assembly 6608 4039 B ...

Страница 46: ...0099CEAS 1 1010 0045CEAS 101S 0001CEAS 101s oo14CEAS 1010 0045CEAS 0 1 s ooo 2 c EA S 1010 0021CEAS 1010 0045CEAS HEATSINK 1 WO X 1 H X L 65lG 2010 0647CEAS HS02 HEATSINK 1 WO X 1 H X L 65lG 2010 0647CEAS JOOi PLUG LOCKING 3 PIN 2250 6003CEAS JOO Z 12PIN 100CTR FLEX CBL CONN 2250 6019EAS J003 2 PIN 100CTR STRAIGHT MALE CONN 2250 5829CEAS PCB1 SPKAMP PS BO 930 1600 4026EAS __ RE S 1w _ 1 0_0 H _M _...

Страница 47: ...OTUSED R009 RESCAR FILM mw5 22K R010 100K 1T SIDEADJ CERMET POT 33S2X R011 RESCAR FILM tl4WS 112 R012 RESCAR FILM 1i wS 112 R013 RES CAR FILM 1 W5 10K R014 RESCAR FILM 1i w5 10K ROIS RESCAR FILM 1i w5 10K R018 RES CAR FILM 1 4WSIio 10K R017 RES CAR FILM 1 4W5 100 R018 RES CAR FILM 114WS lo 1K R019 RES CAR FILM 114W5 1138K R020 RES CAR FILM 1 4WS 10K R021 RES CAR FILM 1 4W5 11 100 R022 RES CAR COMP...

Страница 48: ...O RES MT FLM 1 ffN1 II 053 1C e1 o453CEAS C03I CAP CER IMFO IOOS l loocEAS I _ RES CAR FIIM 1 W5 r 10K 1011 1002CEAS C039 CAPCER IMFO IOOS 1loocEAS I 2 RES CAR 11M 114W51 39K 108 31J02CEAS 0040 CAP CER IMFO IOOS 1loocEAS Ro 3 RES CAR FIIM 114W5 11 1K 1oes 1001CEAS co ICAP ELECTvrMT IOOUF SU8 1010 0110CEAS RES CAR FIIM 114W51 10K 108 100 2CEAS C0 2 1 CAP CER 1MFO IOOS IIOOCEAS R045 RES CAR fllM 114...

Страница 49: ...N 6608 4039 REV B CKTREF DESCRIPTION TFTPARTNO CR07 1N414a 0tOOE 1281 414 EAS CROe 1N414a DIODE 1281 414 EAS CR09 1N4144 DIODE 1281 414 EAS CRIO 1N414ll DIODE 1281 4141CEA CR11 1N4144 DIODE l281 4148C AS CR12 LED PL07 cT R RED 12 4550EAS Fl01 l ILT 10 7MHZl15KHZ BW Q fl TEST 105l 0058CEAS J001 F RIA PC MOUNT JAC J002 7 PIN 200CTR MALERIATERM BLK 17oo 5008EAS J003 PARTS NOT USED IVIWUWW J004 12PIN ...

Страница 50: ...4W5 2 4K 1065 2401CEAS I I R066 IRES CAR FILM 114W5 10K 106S 1002CEAS R067 RES CAR FILM 114W5 10K 106S 1002CEAS I II068 RESCAR FILM 114W5 4700HM 106 0 70CEAS 1 R069 RESCAR FILM 114W5 10K 106S 1002CEAS IR010 IRES CAR FLM 114W5 27K 106S 2702CEAS I IR071 IRES CAR FILM 114W5 1 21 l1065 1201CEAS ROn IRES CAR FILM 114W 5 47K 1 1oss 4702CEAS R073 IRES CAR FLM 114W5 27K l1065 2702CEAS I RN01 10K SIP 8 PIN...

Страница 51: ...www SteamPoweredRadio Com souNO QUALITY S IN CE 1970 1953 CONCOURSE DRIVE SAN JOSE CA 95131 1708 408 943 9323 FAX 408 432 9218 Email info TFTlnc com Website www TFTlnc com ...

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