Anritsu S820A Radio Antenna User Manual
Contents
1. 17 18 19 Using the Menu up down keys Highlight PRECISION RL then press the Select key AtthePRECISION RETURN LOSS menu display usethe Menu up down keys to highlight FINAL then pressthe Select key Press the Calibration key AttheCALIBRATION menu display use the Menu up down keys to highlight START CAL then press the Select key At the PRECISION RETURN LOSS CALIBRATION menu display prompt connect the Offset SWR Autotester to Input A if you have not done so yet Connect the precision air line to the Off set SWR Autotester test port Position the air line pointing vertically upward Downward or horizontal positions make connector pin alignment difficult NOTE Ensure that the beadless end of the precision airline is at the measurement connection point Press the Select key when ready At the PRECISION RETURN LOSS CALIBRATION menu prompt connect the Open to the beadless end of the air line Press the Select key to start the calibration Verify that the display resembles that shown in Figure 5 CAUTION During both calibration and mea surement be sure to properly align the beadless connector of the airline When the connectors are mis aligned a spike will usually be visible on the display At the next menu prompt remove the Open and connect the Short to the beadless end of the airline Press the Se lect key to start the calibration process At the next menu prompt remove the Short a2. Multiplier Local amp Port Reflected Oscillator xi Incident Local Oscillator Yy Display Synchronous Detector A D Converter Serial Port Figure2 SiteMaster Block Diagram 4 FREQUENCY ACCURACY The following test can be used to verify the CW fre quency accuracy of the Site Master Measurement calibration of the Site Master is not required for this test a Equipment Required e Spectrum Analyzer Anritsu Model MS2602A b Procedure 1 Press and hold the ESCAPE CLEAR key then press the ON OFF key to turn on the Site Master This sets the instrument to the factory preset state NOTE Before continuing allow a five minute warm up for the internal circuitry to stabilize 2 Press the FREQ soft key Press the F1 soft key set to 9 GHz then press the ENTER key Press the F2 soft key set to 9 GHz then press the ENTER key Connect the RF cable from the Site Mas ter Test Port tothe RF Input on the MS2602A Set up the Spectrum Analyzer as follows a Press Preset b Press Center and enter 1 GHz c Press the Max Hold button If the Site Master has gone into the hold mode press the RUN HOLD key to make the measurement Use the Spectrum Analyzer marker to measure the center of the response The frequency should be 1 GHz 75 kHz NOTE Nominal power is approximately 0 10 dBm at 1 GHz Site Master S8204 MM 5 RETURN LOSS VERIFICA
3. 0462 96 6688 FAX 0462 25 8379 KOREA ANRITSU SERVICE CENTER 8F Hyunjuk Bldg 832 41 Yeoksam Dong Kangnam Gu Seoul 135 080 Korea Telephone 82 2 553 6603 FAX 82 2 553 6605 SINGAPORE ANRITSU SINGAPORE PTE LTD 10 Hoe Chiang Road 07 01 02 Keppel Towers Singapore 089315 Telephone 65 282 2400 FAX 65 282 2533 SOUTH AFRICA ETESCSA 12 Surrey Square Office Park 330 Surrey Avenue Ferndale Randburt 2194 South Africa Telephone 011 27 11 787 7200 Fax 011 27 11 787 0446 SWEDEN ANRITSU AB Botvid Center Fittja Backe 13A 145 84 Stockholm Sweden Telephone 08 534 707 00 FAX 08 534 707 30 TAIWAN ANRITSU COMPANY 7F NO 316 Sec 1 Nei Hu Road Taipei Taiwan R O C Telephone 886 2 8751 2126 FAX 886 2 8751 1817 UNITED KINGDOM ANRITSU LTD 200 Capability Green Luton Bedfordshire LU1 3LU England Telephone 015 82 43 3200 FAX 015 82 73 1303 14 Site Master S8204 MM NOTES
4. down on the work surface Disconnect the red black cable of the battery pack from the main PCB assembly connector J 6 6 Remove the screw 10 located on the bottom side of the main PCB assembly next to the RF Bridge assembly Pull the PCB assemblies clear from the top half of the case Remove the grey brown cable of the LCD as sembly from the main PCB assembly connec tor J 8 Remove the four screws from the LCD PCB assembly Carefully remove the 20 way ribbon cable from the connector on the keypad PCB as sembly Install the new LCD PCB assembly U se thread locker on the LCD mounting screws Reverse the above procedure to reassemble the Site Master 13 MAIN PCB AND RF MODULE ASSEMBLY REPLACEMENT This procedure provides instructions for replacing the main PCB and RF module assembly Refer to Figure 7 page 7 during this procedure NOTE The test port panel is replaced as part of the main PCB assembly 1 Placethe Site Master face up on a work sur face 2 Remove the four corner rubber bumpers 1 3 Remove the four screws PN 900 811 2 4 While holding the two halves of the Site Master together turn it over and set it face down on the work surface CAUTION In the next step the PCB Assy 3 and test port panel 4 must stay with the front panel 5 Remove the bottom half 5 and fold it over to lay upside down on the work surface 6 Disconnect the red black cable of the battery pack f
5. holding the two halves of the Site Mas ter together turn it over and set it face down on the work surface CAUTION In the next step the PCB Assy 3 and test port panel 4 must stay with the front panel Remove the bottom half 5 and fold it over to lay upside down on the work surface Disconnect the red black cable of the battery pack from the main PCB assembly connector J 6 6 Remove the screw 10 located on the bottom side of the main PCB assembly next to the RF Bridge assembly Pull the PCB assemblies clear from the top half of the case Lift the keypad membrane clear from the keypad assembly Install a new membrane NOTE Carefully use pliers to pull the rub ber tabs tight to ensure that the membrane is flush with the PCB Reverse the above procedure to re assemble the Site Master Site Master S8204 MM 12 LCD REPLACE MENT This procedure provides instructions for replacing the Liquid Crystal Display LCD Refer to Figure 7 page 7 during this procedure 1 10 11 12 13 Place the Site Master face up on a work sur face Remove the four corner rubber bumpers 1 Remove the four screws PN 900 811 2 While holding the two halves of the Site Master together turn it over and set it face down on the work surface CAUTION In the next step the PCB Assy 3 and test port panel 4 must stay with the front panel Remove the bottom half 5 and fold it over to lay upside
6. 0227 0 0112 39 39 0 0969 0 0980 0 1949 0202 0 0100 40 40 0 0864 0 0873 0 1737 0180 0 0089 4 4 0 0771 0 0778 0 1548 0160 0 0079 42 42 0 0687 0 0693 0 1380 0143 0 0071 43 43 0 0613 0 0617 0 1230 0127 0 0063 44 44 0 0546 0 0550 0 1096 0113 0 0056 45 45 0 0487 0 0490 0 0977 0101 0 0050 46 46 0 0434 0 0436 0 0871 0090 0 0045 47 47 0 0387 0 0389 0 0776 0080 0 0040 48 48 0 0345 0 0346 0 0692 0071 0 0035 49 49 0 0308 0 0309 0 0616 0063 0 0032 50 50 0 0274 0 0275 0 0549 0057 0 0028 51 51 0 0244 0 0245 0 0490 0050 0 0025 52 52 0 0218 0 0218 0 0436 0045 0 0022 53 53 0 0194 0 0195 0 0389 0040 0 0020 54 54 0 0173 0 0173 0 0347 0036 0 0018 55 55 0 0154 0 0155 0 0309 0032 0 0016 56 56 0 0138 0 0138 0 0275 0028 0 0014 57 57 0 0123 0 0123 0 0245 0025 0 0013 58 58 0 0109 0 0109 0 0219 0022 0 0011 59 59 0 0097 0 0098 0 0195 0020 0 0010 60 60 0 0087 0 0087 0 0174 12 Site Master S820A MM RETURN LOSS VERIFICATION WORKSHEET Source Match Peak to Peak Ripple Return Loss Value Corrected Directivity Peak to Peak Ripple Return Loss Value Sum of RLV and mean should be lt 32 dB Site Master S8204 MM 13 Table3 Anritsu Service Centers UNITED STATES ANRITSU COMPANY 685 Jarvis Drive Morgan Hill CA 95037 2809 Telephone 408 776 8300 FAX 408 776 1744 ANRITSU COMPANY 10 NewMaple Ave Suite 305 Pine Brook NJ 07058 Telephone 973 227 8999 FAX 973 575 0092
7. 365 18 8145 5 8480 0 7079 3 3 4 6495 10 6907 15 3402 4 4194 0 6310 4 4 4 2489 8 6585 12 9073 3 5698 0 5623 5 5 3 8755 7 1773 11 0528 3 0095 0 5012 6 6 3 5287 6 0412 9 5699 2 6146 0 4467 7 7 3 2075 5 1405 8 3480 2 3229 0 3981 8 8 2 9108 4 4096 7 3204 2 0999 0 3548 9 9 2 6376 3 8063 6 4439 9250 0 3162 0 0 2 3866 3 3018 5 6884 7849 0 2818 1 1 2 1567 2 8756 5 0322 6709 0 2512 2 2 1 9465 2 5126 4 4590 5769 0 2239 3 3 1 7547 2 2013 3 9561 4935 0 1995 4 4 1 5802 1 9331 3 5133 1 X 4326 0 1778 5 5 1 4216 4 7007 3 1224 3767 0 1585 6 6 1 2778 1 4988 2 7766 3290 0 1413 7 7 1 1476 1 3227 2 4703 2880 0 1259 8 8 1 0299 1 1687 2 1986 2528 0 1122 9 9 0 9237 1 0337 1 9574 2222 0 1000 20 20 0 8279 0 9151 1 7430 1957 0 0891 21 21 0 7416 0 8108 1 5524 1726 0 0794 22 22 0 6639 0 7189 1 3828 1524 0 0708 23 23 0 5941 0 6378 1 2319 1347 0 0631 24 24 0 5314 0 5661 1 0975 1192 0 0562 25 25 0 4752 0 5027 0 9779 1055 0 0501 26 26 0 4248 0 4466 0 8714 0935 0 0447 27 27 0 3796 0 3969 0 7765 0829 0 0398 28 28 0 3391 0 3529 0 6919 0736 0 0355 29 29 0 3028 0 3138 0 6166 0653 0 0316 30 30 0 2704 0 2791 0 5495 PHASOR 0580 0 0282 31 31 0 2414 0 2483 0 4897 INTERACTION 0515 0 0251 32 32 0 2155 0 2210 0 4365 0458 0 0224 33 33 0 1923 0 1967 0 3890 0407 0 0200 34 34 0 1716 0 1751 0 3467 0362 0 0178 35 35 0 1531 0 1558 0 3090 0322 0 0158 36 36 0 1366 0 1388 0 2753 0287 0 0141 37 37 0 1218 0 1236 0 2454 0255 0 0126 38 38 0 1087 0 1100 0 2187
8. ANRITSU COMPANY 1155 E Collins Blvd Richardson TX 75081 Telephone 1 800 ANRITSU FAX 972 671 1877 AUSTRALIA ANRITSU PTY LTD Unit 3 170 Foster Road Mt Waverley VIC 3149 Australia Telephone 03 9558 8177 FAX 03 9558 8255 BRAZIL ANRITSU ELECTRONICA LTDA Praia de Botafogo 440 Sala 2401 CEP22250 040 Rio de Janeiro Ru Brasil Telephone 021 527 6922 FAX 021 53 71 456 CANADA ANRITSU INSTRUMENTS LTD 700 Silver Seven Road Suite 120 Kanata Ontario K2V 1C3 Telephone 613 591 2003 FAX 613 591 1006 CHINA SHANGHAI ANRITSU ELECTRONICS CO LTD 2F Rm B 52 Section Factory Bldg NO 516 Fu Te Road N Waigaogiao Free Trade Zone Pudong Shanghai 200131 PR CHINA Telephone 86 21 58680226 FAX 86 21 58680588 FRANCE ANRITSU S A 9 Avenue du Quebec Zone de Courtaboeuf 91951 Les Ulis Cedex Telephone 016 09 21 550 FAX 016 44 61 065 GERMANY ANRITSU GmbH Grafenberger Allee 54 56 D 40237 Dusseldorf Germany Telephone 0211 968550 FAX 0211 9685555 INDIA MEERA AGENCIES P LTD A 23 Hauz Khas New Delhi India 110 016 Telephone 011 685 3959 FAX 011 686 6720 ISRAEL TECH CENT LTD 4 Raul Valenberg St Tel Aviv Israel 69719 Telephone 972 36 478563 FAX 972 36 478334 ITALY ANRITSU Sp A Rome Office Via E Vittorini 129 00144 Roma EUR Telephone 06 50 2299 711 FAX 06 50 22 4252 JAPAN ANRITSU CUSTOMER SERVICE LTD 1800 Onna Atsugi shi Kanagawa Prf 243 Japan Telephone
9. MAINTENANCE MANUAL Site Master S820A Antenna and Coax Waveguide Analyzer Figurel SiteMaster S820A 1 INTRODUCTION This manual provides maintenance instructions for the Site Master S820A Antenna and Coax Wave guide Analyzer It describes the product and provides performance verification procedures parts replace ment procedures and a replaceable parts list 2 DESCRIPTION The Site Master Figure 1 is ahand held SWR RL standing wave ratio return loss and Distance To Fault measurement instrument It combines a syn thesized source VSWR Bridge and receiver on a single printed circuit board PCB An optional power monitor is also available A block diagram is shown in Figure 2 490 JARVIS DRIVE MORGAN HILL CA 95037 2809 3 PERFORMANCE VERIFICATION Paragraphs 4 through 7 contain tests that can be used to verify the performance of the Site Master model S820A having any version of firmware 3 1 Initial Setup for Testing 1 Press and hold the ESCAPE CLEAR key then press the ON OFF key toturn on the Site Master This sets the instrument to the factory preset state 2 Release the ESCAPE CLEAR key and use the Up Down Arrow key to adjust the contrast to give a readable display Anritsu _ P N 10580 00031 REVISION D PRINTED FEBRUARY 2003 COPYRIGHT 1999 2003 ANRITSU CO DS DS a A Test A gt Multiplier Coupier i RF Source Wave Module
10. TION The following test can be used to verify the accuracy of return loss measurements Verification is per formed by measuring the Source Match and Cor rected Directivity This method eliminates the uncer tainties of measuring standard offset Measurement calibration oftheSite Master is required for this test Refer tothe RF Measurement Chart on page 12 and the Return Loss Verification worksheet on page 13 a Equipment Required e 19K 50 Precision Airline e 22KF50 Open Short e 22K50 Open Short e 29KF50 15 Precision Offset Termination e 28K50 Precision Termination b Procedure 1 Press and hold the ESCAPE CLEAR key then press the ON OFF key to turn on the Site Master This sets the instrument to the factory preset state NOTE Before continuing allow a five minute warm up for the internal circuitry to stabilize Perform an OSL calibration over the fre quency range of the unit using the 22K 50 Open Short and the 28K 50 Precision Ter mination Verify that noise spikes are be low 44 dB and that the trace is smooth Repeat as required Remove the 28K 50 Termination Connect a 19K50 Precision Airline to the test port Connect a 22KF50 Open Short tothe open end of the airline Press the AUTOSCALE key Measure and record the worst case peak to peak ripple Site Master S8204 MM 10 11 12 13 14 15 Usethe RF Measurement Chart to corre late the peak to peak ripple r
11. eading to a return loss value in dB The measured value should be 18 dB 3 3 10 5 GHz 14 dB 10 5 20 GHz Remove the 22KF 50 Open Short Connect the 29K F 50 15 Precision Offset Termination tothe open end of the air line Press the AUTOSCALE key sS s Measure and record the worst case peak to peak ripple Add this value to the mean value of the 29K F 50 15 Precision Offset Termination Use the RF Measurement Chart to corre late the reading to a return loss value in dB The measured value should be lt 29 dB 3 3 20 GHZ Remove the airline and Precision Offset Termination 6 POWER MONITOR VERIFICATION 2 Connect theMA2418A Reference Source to the input of the 560 7N50B RF detec If the Power Monitor Option 5 is installed in the tor Site Master the following test can be used to verify 3 Connect the RF Detector output to the the accuracy of the power measurements M easure RF Detector input of the Site Master ment calibration of the Site M aster is not required p d for this test 4 Connect the DC power supply to the ap propriate line voltage to supply power to a Equipment Required the MA2418A Reference Source 5 Press and hold the ESCAPE CLEAR key then press the ON OFF key toturn on the Site Master This sets the instrument to RF Detector 10 MHz to 20 GHz Anritsu 560 7N 50B e 10dB Attenuator Weinshel 1R 10 the factory preset state e 30 dB Attenuator Weinshel IR 30 6 Pr
12. ess the MODE soft key e RF Reference Source 0 050 GHz 7 Usethe Up Down Arrow key to highlight Anritsu MA2418A POWER MONITOR then press ENTER e DC Power Supply Anritsu 2000 933 8 Press the ZERO soft key to zero the power monitor b Procedure When complete ZERO ADJ ON is dis played in the message area 1 Connect the DC power supply to the 9 Verif ani i y that the power monitor reading is MA2418A Reference Source Refer to 0 0 dBm 1 dB Figure 3 Attenuators m 560 7N50B MA2418A RF detector ES Reference Source q AREAS N A Ya N el Anritsu AZ l Va e J Sn DC Power Supply Figure3 Power Monitor Verification 4 Site Master S8204 MM 10 Connect the output of the MA2418A Ref b Procedure erence Source to the two attenuators so as to add 40 dB of attenuation Figure 3 1 Connect the test equipment as shown in 11 Connect the MA2418A Reference Source ounce and the attenuators to the input of the 2 Press the Power key on the 541XXA to 560 7N50B RF detector On 12 Verify that the power monitor reading is Press the System Menu key Flow SOUR Meee Using the Menu up down keys Highlight 7 TERMINATION VERIFICATION RESET then press NEISSE 5 AttheRESET MENU display use the This test can be used to verify the accuracy of termi Menu up down keys to highlight natio
13. four screws 2 7 Install the rubber bumpers 1 on all four corners of the instrument 10 BATTERY DISPOSAL The battery used in the Site Master is a recharge able nickel cadmium NiCd battery and is covered by the Battery Directive 91 157 EEC As such the battery is marked as follows to indicate controlled disposal This marking indicates that the battery is a recyclable product This marking indicates that the battery requires separate collection and shows the chemical system Nickel Cadmium of Cell i ing indi Component C S This marking indicates the Weight heavy metal component Nickel 191026 concentration as a percentage Cadmium 17to22 of battery cell weight Spent nickel cadmium batteries are valuable re sources Because they are reusable do not throw them away Arrange for proper return for recycling in your locality If you do not have access to proper disposal methods return the battery pack to your Anritsu service center Service centers will dispose of the unit at no charge Anritsu Service Centers are listed on page 14 of this manual Site Master S8204 MM 11 KEY PAD MEMBRANE REPLACEMENT This procedure provides instructions for replacing the key pad membrane Refer to Figure 7 page 7 during this procedure 1 10 11 Place the Site Master face up on a work sur face Remove the four corner rubber bumpers 1 Remove the four screws PN 900 811 2 While
14. nd connect the 50 Ohm Termina tion to the beadless end of the air line Press the Select key to start the calibra tion process 1 PRECSN RL A 2 OFF 10 0dB DIV OFFSET 0 00B s4147 PRECISION RETURN LOSS CALIBRATION H CONNECT OPEN TO AIRLINE PRESS SELECT WHEN READY START 0 0100 GHz 401 pts STOP 20 0000 GHz LEVEL 7 0 dBm 2 GHz DIV Figure5 Exampleof a Good Connection 20 21 22 When the calibration is complete remove the 50 Ohm Termination Connect the Termination under Test to the beadless end of the air line and press the Select key to begin the measurement Observe that the waveform displayed re sembles that shown in Figure 6 1 PRECSN RL A 2 OFF 10 0dB DIV OFFSET 0 0dB 54147A CURSOR 1 46 02 dB 10 0050 GHz PRESS SELECT CURSOR MENU START 0 0100 GHz 401 pts STOP 20 0000 GHz 2 GHz DIV LEVEL 7 0 dBm Figure6 Direct Readout of the Precision Return Loss 23 24 Press the Cursor On Off key to On Observe the CURSOR menu readout for the return loss reading The minimum return loss reading for the 28K 50 termi nator should be 34 dB 3 3 18 5 GHz 29 dB 18 5 20 GHZ s lt Site Master SS20A MM 8 BATTERY PACK REMOVAL This procedure p
15. ns used with the Site Master The test uses the RESET TO FACTORY DEFAULTS then precision return loss mode of the 541XXA Scalar press the Select key Measurement System Measurements of termina 6 Set the sional source for the freouen tions using this mode provide results that are trace oe Kr log Eu abletothe NIST National Institute of Standards range as TONOwS and Technology standards for the precision airline a Press the Frequency key ey b Using the Data Entry Keypad or EQUIPO nequired Data Entry Knob set the START fre Scalar Measurement System N to 0 01 GHz Press the Enter Anritsu 54161A 69A y c Using the Data Entry Keypad or pices En Data Entry Knob set the STOP fre Da quency to 20 0 GHz Press the Enter e Precision Airline Anritsu 19K F 50 key e Open Short Anritsu 22K 50 7 Press the Channel 2 Display On Off key 50 Ohm Termination Anritsu 28K 50 TOON Source Adapter Anritsu K220B Be ER IE EDEL Open Short 50 Ohm i Termination Termination g under Test 541XXA Scalar Measurement System m Beadless End lt 8000 0000 0 Precision Air Line oO olo o o o ojo oO avo OO I ei S227 i Connect Dashed Line Connections Se qee JJ When Directed By Procedure y gt oo oo 13 0 o o O O A B Source Offset SWR Adapter Autotester Figure4 541XXA Precision Return Loss Test Setup Site Master S8204 MM 10 11 12 13 14 15 16
16. ories Hardware 40580 00030 ee Site Master 4 790 171 Silicon Pad 1 761 10 Cap Vinyl Black round 0 625 4 10580 00007 Battery Replacement and 4 ID Disposal Guide 790 52 Washer 4 Shoulder Nylon 1 2300 347 Software Tools Site Master 1 900 257 Pan Head Screw 0 312 4 40 115 Power Supply 1 790 445 Spacer PCB 0 625 Self Mount 9 806 62 Cable Assy Cig Plug Female 1 900 800 Pan Head Screw 4 0 312 1 800 441 Serial Interface Cable Assy 1 900 811 Pan Head Screw 4 4 D41955 Carrying Case 1 900 326 Nut Kep 4 40 0 312 4 Replaceable Parts 900 697 Pan Head Screw 4 40 0 312 3 B42893 EMI Shield 1 900 138 Screw Pan 2 56 patchlock 4 0 18 C41761 Liquid Crystal Display Assy 1 B41753 Gasket LCD 1 ND45417 Battery Pack Kit 1 Main PCBA S820A with ern ND52636 ain SSy wit 1 uwave module and cables D40861 3 Case 1 D41766 3 Keypad PCB Assy 1 C40863 Bumper 4 D40864 2 Membrane Keypad Main 1 B48182 ID Label Model S820A 1 C41767 Membrane Soft Keys 1 Site Master 5820 A MM 11 Table2 RF Measurement Chart Conversion tables for Return Loss Reflection Coefficient and SWR with tabular values for inter action of a small phaser x with a large phaser unity reference expressed in dB related to refer ence Relative to Unity Reference SWR Reflection Return x REF X REF X REF X Coefficient Loss dB dB dB Peak to dB Below Peak Refer Ripple ence dB 17 3910 0 8913 1 1 5 5350 19 2715 24 8065 8 7242 0 7943 2 2 5 0780 13 7
17. rom the main PCB assembly connector J 6 6 7 Remove the screw 10 located on the bottom side of the main PCB assembly next to the RF Bridge assembly 8 Pull the PCB assemblies clear from the top half of the case 9 Disconnect the grey brown cable of the LCD assembly from the main PCB assembly con nector J 8 10 Remove the four screws holding the LCD as sembly but do not disconnect the 20 way connector from the keypad PCB assembly 11 Use pliers to gently squeeze the nine plastic spacer heads to release them from the K ey pad PCB assembly and carefully pull the Keypad PCB with the LCD assembly from the main PCB assembly 10 13 14 Remove the four standoffs and the EMI shield cloth NOTE If the Power Monitor Option 5 is in stalled remove the two screws hold ing the Option 5 PCB assembly to the test port panel and unsolder the wires from pins 1 through 4 of the RF Detector connector on the test port panel Carefully remove the serial number from the test port panel Install the serial number on the replacement test port panel Reverse the above procedure to re assemble the Site Master Site Master S8204 MM 14 REPLACEABLE PARTS Replaceable parts for the Site Master are listed in Table 1 Tablel Parts List Part Number Description Qty Part Number Description Qty Access
18. rovides instructions for removing the battery pack Refer to Figure 7 during this proce dure 1 Place the Site Master face up on a work sur face Remove the four corner rubber bumpers 1 Remove the four screws PN 900 811 2 While holding the two halves of the Site Mas ter together turn it over and set it face down on the work surface CAUTION In the next step the Main RF PCB assembly 3 and test port panel 4 must stay with the front panel Remove the bottom half 5 and fold it over to lay upside down on the work surface Disconnect the red black cable of the battery pack from J 6 6 of the Main RF PCB assem bl y 3 Remove the four screws 7 holding the bat tery bracket 8 in place and lift the bracket clear Remove the battery assembly 9 Zo O 7 4 Places Figure7 SiteMaster Battery Removal Site Master S820A MM 9 BATTERY PACK REPLACEMENT This procedure provides instructions for replacing the battery pack Refer to Figure 7 during the proce dure 1 Install the new battery assembly 9 2 Replace the battery bracket 8 and insert the four screws 7 to hold the battery bracket in place 3 Reconnect the red black cable of the battery pack battery to J 6 6 on the main RF PCB assembly 3 4 Set the bottom half in place 5 While holding the two halves together turn the Site Master over and lay it face up on the work surface 6 Reinstall the
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