Il INSTALLATION IV CONTROL FUNCTIONS .V _OPERATION | SPECIFICATIONS , DESCRIPTION . .. VI THEORY OF PORE ; PARTS LIST.
SECTION | SPECIFICATIONS GENERAL: Semiconductor Complement & Transistors PET I¢ Diodes Frequency Range (For Specification) Voltage Current Required X RX Size Weight Antenna impedance Number of Channels Frequency Control TRANSMITTER: Power Out Modulation Width Microphone Impedance Spurious Level RECEIVER: Modulation Acceptance Type Receiver Sensitivity Microlight: Spurious Response Band pass Squelch: Sensitivity Audio Output 128 depending on channels 146 148 MH2 13.8 VDC Negative Ground 2.
SECTION 1} DESCRIPTION This: transceiver Is extremely rugged and completely solid state: State of the art devices'such as Integrated Circuits; Field Effect Transistors;: Var actor and: Zenger diodes are engineered into a tight-knit straightforward electronic design throughout both transmitter and receiver. Reliability, fow current demand, excelled performance and ease of operation are the net result.
R detonate (03] Unpacking: Carefully remove your transceiver from ‘the packing carton and examine it for signs of shipping damage. Should any Shipping damage be apparent, notify: the: delivering carrier oF dealer immediately, stating the full extant of the damage. [t is recommended vou keep the shipping cartons: In the event storage moving or reshipment becomes necessary, they cone i handy. Accessory hardware, tables, st, are packed ‘with the transceiver.
Antenna: The most important single item that will influence the performance of any communication system s ‘the ‘antenna. For ‘that reason; a good, inequality’ gain antenna 6f 50 Ohms impedance is recommended. fixed or mobile, I VHE as well a5 the low bands, every watt of ERP snakes some difference. Therefore, 10 watts average output plus 3 db of gain antenna equals 20 watts ERP, presuming Tow SWERVE of course.
CAUTION: DO NOT USE A SOLDERING IRON OF MORE THAN 40 WATTS ON THE MATRIX The matrix board may be removed by taking out the hold-down screw at the ‘end of the board and pulling gently steamship up on the either end o disconnect the matrix from the connector. The numbers T through 22 indicate the channel number to be programmed and the numbers D-0 through D7 indicate. the: position:in which: the diode is:to be placed: corresponding to the insert positions on the Frequency vs Matrix Chart.
SECTION IV ' CONTROL FUNCTIONS Front Control and Jacks (Fig. 24) High-Off-Low Switch: . Opens or closes the 12 VDC source voltage 1o the transceiver, Fln High'! position, cutout power is 10 watts. “In Low?” position, output powers | watt, ADP SPX DP: This determines whether the transceiver transmits or receives on the program frequency, of +600KHz above the program frequency. Volume Control Controls audio output level of the receiver. Squelch Control: Controls the squelch threshold point of the receiver.
NV OPERATION Initial Preparations: Connect the microphone to the microphone jack. Connect the antenna {0 the anteing coax connector! Make sure the coax Tine Is of the correct impedance (50 ohms) and is neither shorted nor open. Make sure the function switch is in the off position, then connect the power supply cord to the power supply jack. The red lead should be connected o the positive side of the power source and the black lead to the negative side.
SECTION VI _THEORY OF OPERATION TRANSMITTER: Microphone, per-amplifier circuit The per-amplifier circuit is composed of Q30, Q29; in an NPN, PNE direct-coupled 2-stage amplifier configuration. The low noise transistors used and application of a large amount of feedback in the 1st stage gives a Hugh signal-to-nose ratio and high stability. Since DU voltage is supplied through "R139 1o the ‘microphone: connector, the COSMIC. (electrolytic condenser microphone) can be used also.
Interstate amplifier BPF output is amplified up to about 2 mW in the Q22 stage which is « LEFTMOST with good linearity. Low level amplifier Interstate amplifier output is-amplified to about 100 mW by stage Q19 which also functions as an ALC circuit: Driver stage Low level outputs amplified to approximately 1.
RECEIVER R.F Amplifier ‘Antenna input -or self contained antenna signals pass through switching diode D-40 located in the PA section to the RE amplifier Q2 where it is amplified and passed to the R.F filter section: Outcome-band signals are attenuated by tile band pass filters. Mixer Filter The amplifier signal is injected into Gate-1 of the mixer Q-3 The LO frequency is also applied fo: (03 where a resultant 10,7 MHz 1E signal is derived.
Local oscillator ‘The overtone oscillator in Q7 Is provided to reduce spurious signals resulting from multiplication of the fundamental oscillator. 16 is provided in series with {he crystal to facilitate frequency adjustment. L3, which is connected 1o the collector, is tuned 1o 4 frequency which is three {3) times the ‘overtone oscillator output, giving a frequency of 131.70 MHz, Frequency converter Balanced mixer 1C4 is a voltage regulator and a differential amplifier.
Reference oscillator divider 1C2 s an 10 nosed 1o produce the reference frequency for the synthesizer, and includes a quartz crystal oscillator and a 12-stage high speed divider. The oscillator produces 7.8MHz oscillations which the high-speed divider section divides by 1024 to give the 7.5 kHz reference pulses. Phase detection loop filter 1C2 is:a phase detector for the frequency synthesizer and is made up of 1 digital phase com. para tor and un amplifier for the active low-pass filter.
Power supply Reverse conception protection circuit 1f power with the wrong polarity is applied; D28 is forward biased and there is therefore s sarge current flow which blows the fuse provided on the external lead, preventing damage (o circuit elements.
VOLTAGE CHARTS SECTION VIl OO0 eSS DGO QOO Chdndendosssondooressrr s e e Do000D mmu 000 Dow S A OO C00 000D 000 0N Lidia co-conspicuous nnsbeLeo0 10 SIMPLEX; the input code is the same as the output code: 21
Set Pl Out 1m DIODE INSERT POSITIONS Simian Reg: Frequented: Freda: Total 1281 Jax {MHz lex i (MHz) (Viz) 14ep010 135310 1620 108 146025 136,325 1635 100 Y : rogue . 3 146,040 135.340 1.650 110 146,055 136355 1686 911 146,070 135370 1680 112 146.085 135,385 1896 113 188100 138400 1710 113 146.115 186415 1728 115 * * * Mop 8 146,130 136430 1790 118 14e14s 136445 1785 117 14e.
Set BPLLOut 1M DIODE INERT POSITIONS SimpEreg, Dup& Fres Fre. Total 128 {MHz) 2 ex {MHz] 1467151 8 1360151 2325 | 4EB 146730 9 138030 2340 186 148745 10 136.045 2365 157 448760 11 138080 2370 168 438775 12 138075 2385 1b9 531 448790 0 13 186080 12400 160 146805 14 136106 2415 . 161 146820 15 136,120 2.430 162 146,835 18 136135 2445 163 146850 17 136150 2460 164 146865 18 136,165 2475 165 50448880 19 138180 2490 1068 146895 20 138195 2505 4R7 146010 21 136210 2520 168 146,925 22 138005 2535 .