Neutec SP-602H Service Manual Download Page 16 | Manualshive

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Summary of Contents for SP-602H

Page 1: ...1 7_ _ Service Manual August 1 84 11 MK C _i _ _ CJ SP j05H SP ft02H Synthe iz d VtiF fPortat e R p 2CL _ IIIIVEUTEC 0 cr n joe Con mur ications...

Page 2: ...s __ _ 1 Operation 2 Theory of Operation 3 Frequency Programming 5 Alignment Procedures 9 Parts List 1 O Options 11 Block Diagram 12 Receiver Board Layout 13 PLLITransmitter Board Layout 14 Schematic...

Page 3: ...Audio Frequency Response Pin 3 RECEIVER Sensitivity 12 dB SINAD Selectivity Modulation Acceptance with NBF Option Spurious Rejection Receiver Attack Time Frequency Stability Audio Frequency Response P...

Page 4: ...lts Both of these battery paeks are easily changed by the user For optimum performance these niekel cadmium paeks should be completely diseharged periodieally prior to recharges This allows the batter...

Page 5: ...the LO power position whenever possible This raduces the dutput power of the transmitter and saves battery drain during transmissions However if the LO setting does not provide sufficient range the s...

Page 6: ...threshold is established by control of an active filter within IC201 This threshold is determined by the position of squelch potentiometer VR301 When no carrier is present allow ing high frequency noi...

Page 7: ...stal frequency at the pre mix oscillator Mixer and Low Pass Filter The mixer circuit of TR113 mixes the VG frequency with the output of the pre mix asciIIatar TR115 The desired resultant which is the...

Page 8: ...160 165 31 00 36 35 165 170 32 25 37 60 170 175 33 50 38 85 153 158 29 25 34 6 Note SP 605H units are shipped from the factorywith RX1 X103 and RX2 X104 installed per order if specified Should ranging...

Page 9: ...99 N 3000 B3 2000 B3 2000 A3 1000 D2 800 D2 800 C2 400 C2 400 B2 200 B2 200 A2 100 A2 100 D1 80 D1 80 C1 40 C1 40 B1 20 B1 20 A1 10 A1 10 DO 8 DO 8 CO 4 CO 4 BO 2 BO 2 AO 1 AO 1 Locations B3 AO refer...

Page 10: ...L SWITCHING An additional diode location exists in each section of the matrix board These locations next to the AO position of each section are for the purpose of crystal switching into operationRX1 o...

Page 11: ...J o J o a o a a ff A lCH RX B 2CH R c n RX 0 4CH RX E 5Qi RX F OC H RX G 101 TX H 2CH Tx i l H TX J 4CH n K CH Tx L OC H T ro...

Page 12: ...200 Hz according to the following calculation RX Fo 21 4 X 5 TX Fo X 5 Where Fo selected frequency For frequencies in the lower 5 MHz receive band adjust VC1 07 to obtain the proper frequency For freq...

Page 13: ...output factory set for 1 watt Modulator Alignment Set the transmitter in the HI position and modulate the transmitter Adjust VR20l for 4 8 kHz of deviation Check the LO power setting to assure that th...

Page 14: ...O 1 1 O 18 123 0 O 1 O 1 O O 19 127 3 1 O O 1 1 O 20 131 8 1 O O 1 O O 21 136 5 O O O 1 1 O 22 141 3 O O O 1 O O 23 146 2 1 1 1 O 1 O 24 151 4 1 1 1 O O O 25 156 7 O 1 1 O 1 O 26 162 2 O 1 1 O O O 27...

Page 15: ...10L Schematic 1011 on co co co o TC w 0 IO lly YIJOI ct ol t l nu o T m c 715 w ca 1702 iO il w o o o Tl 7 O i IC701 MX335 ca LI CO i 7 O 3 5 811 C 7 04 0 47 50V o i co 4 J 70 i r Ar cl o Q s W J O i...

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