HARRISON II SPECIFICATIONS General Frequency coverage 26.565 ~ 27.405MHz Operating mode F3E (FM), A3E (AM) Antenna Impedance Working temperature –10 ~+55 Frequency Tolerance Better than 0.002% Input Voltage 13.2V & 26.4V DC Grounding Method Negative ground 13.2V : 2.0A Max.
HARRISON II CIRCUIT DESCRIPTION Frequency configuration The receiver utilizes double conversion. The first IF is 10.695MHz and the second IF is 455kHz. The first local oscillator signal is supplied from the VCO module. The VCO module in the transmitter generates the necessary frequencies. Fig. 1 shows the frequencies.
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HARRISON II CIRCUIT DESCRIPTION 1ST MIXER IF AMP RF AMP CB100 RF AMP RF AMP Q104 CF100 Q103 D111,D112,D113 10.695MHz Q113 Q114 Q105 455kHz CF500 ANT SW Tuning voltage U303A OSC 10.240MHz 1st Local OSC (VCO MODULE) JACK(EXT SP) FM AF FM IF DET AF PA U101 U305 AUDIO PROCESSOR U700 AM AF AM DET FROM D117 (MIC) AFMUT line (MPU) Fig.
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HARRISON II CIRCUIT DESCRIPTION Power Amplifier Circuit The transmit output signal from the RF module passes through the amplified by Q110 and Q121. The amplified signal goes to the final amplifier (Q120) through a low-pass filter. The lowpass filter removes unwanted high-frequency harmonic components, and the resulting signal is transmitted through the antenna terminal.
HARRISON II PARTS LIST LCD UNIT Designators Comment Description Footprint C800 103P S0402 C801 103P S0402 C802 103P S0402 C803 103P S0402 C804 225PA S0402 C805 225PA S0402 C807 103P S0402 C808 103P S0402 C809 103P S0402 C810 102P S0402...
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HARRISON II Designators Comment Description Footprint D849 DLS0603-0010 BLUE SD0603(LED) D850 DLS0603-0010 BLUE SD0603(LED) D851 DLS0603-0010 BLUE SD0603(LED) D852 DLS0603-0010 BLUE SD0603(LED) D853 DLS0603-0010 BLUE SD0603(LED) D854 DLS0603-0010 BLUE SD0603(LED) D855 DLS0603-0010 BLUE SD0603(LED) D856 DLS0603-0010 BLUE SD0603(LED) D857 DLS0603-0010...
HARRISON II BLOCK DIAGRAM JK301 Y100 MAIN UNIT JACK(PA SP) 10.24MHz NB RF AMP NB RF AMP NB DET NB ATT OSC AMP Y101 Q106, Q107 Q115, Q1116 D115 Q109 Q111 (455KHz) Q108 Q117 POWER AMP IC U305 JK300 CB100 Q104 JACK(EXT SP) 10.695MHz CF100 1ST MIXER (455KHz) (FM) FM IF IC 1ST RF AMP IF AMP IF AMP U101 MUTE SW...
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