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Icom IC-22S PLL Synthesized 2-Meter Transceiver 

Instruction Manual and Service Notes 

 

17

 

 

Freq. 

"N" 

+Offset  

-Offset  

D7 

D6 

D5 

D4 

D3 

D2 

D1 

D0 

145.710 

88 

146.310 

145.110 

145.725 

89 

146.325 

145.125 

145.740 

90 

146.340 

145.140 

145.755 

91 

146.355 

145.155 

145.770 

92 

146. 370 

145.170 

145.785 

93 

146.385 

145.185 

145.800 

94 

146.400 

145.200 

145.815 

95 

146.415 

145.215 

145.815 

95 

146.415 

145.215 

145.830 

96 

146.430 

145.230 

145.845 

97 

146.445 

145.245 

145.860 

98 

146.460 

145.260 

145.875 

99 

146.475 

145.275 

145.890 

100 

146.490 

145.290 

145.905 

101 

146.505 

145.305 

145.920 

102 

146.520 

145.320 

145.935 

103 

146.535 

145.335 

145.950 

104 

146.550 

145.350 

145.965 

105 

146.565 

145.365 

145.980 

106 

146.580 

145.380 

145.995 

107 

146.595 

145.395 

146.010 

108 

146.610 

145.410 

146.025 

109 

146.625 

145.425 

146.040 

110 

146.640 

145.440 

146.055 

111 

146.655 

145.455 

146.070 

112 

146.670 

145.470 

146.085 

113 

146.685 

145.485 

146.100 

114 

146.700 

145.500 

146.115 

115 

146.715 

145.515 

146.130 

116 

146.730 

145.530 

146.145 

117 

146.745 

145.545 

146.160 

118 

146.760 

145.560 

146.175 

119 

146.775 

145.575 

146.190 

120 

146.790 

145.590 

146.205 

121 

146.805 

145.605 

146.220 

122 

146.820 

145.620 

146.235 

123 

146.835 

145.635 

146.250 

124 

146.850 

145.650 

146.265 

125 

146.865 

145.665 

146.280 

126 

146.880 

145.680 

146.295 

127 

146.895 

145.695 

146.310 

128 

146.910 

145.710 

146.325 

129 

146.925 

145.725 

146.340 

130 

146.940 

145.740 

146.355 

131 

146. 955 

145.755 

146.370 

132 

146.970 

145.770 

146.385 

133 

146.985 

145.785 

Summary of Contents for IC-22S

Page 1: ...Icom IC 22S PLL Synthesized 2 Meter Transceiver Instruction Manual and Service Notes...

Page 2: ...dance 50 ohms Number of Channels 23 channels selected from any of the 132 channels on 15 KHz spacing Frequency Control Stabilized master oscillator PLL programmed by diode matrix TRANSMITTER Power Out...

Page 3: ...ial frequency stability Twenty two 22 channels are provided for operating convenience and versatility High Q stages provide minimum interstage spurious response A low pass filter is placed at the outp...

Page 4: ...d to these deficiencies If an AC power supply other than the matching supply is used with your transceiver make certain it is adequately regulated for both voltage and current Low voltage while under...

Page 5: ...crophone A high quality dynamic microphone is supplied with your transceiver Merely plug it into the proper receptacle on the front panel Should you wish to use a different microphone make certain it...

Page 6: ...cathode pointing UP The cathode lead is bent down to go through the board to connect to the other side After the diodes have been inserted for the channel turn the board over carefully so as to not ha...

Page 7: ...e mode and relative RF output in transmit mode The meter face is illuminated with a white lamp when the transceiver is switched on Channel Selector Selects one of 22 channels C O S lamp Also shows out...

Page 8: ...ust the volume control to a comfortable listening level of noise if no signal is present Carefully adjust the squelch control clockwise until the noise just disappears This is the proper squelch thres...

Page 9: ...eedback circuit connects to ground serves for adjusting the operating point of Q26 and insuring symmetry of clipped waveforms Dl 8 and D19 are temperature compensating elements for the 3 stage DC circ...

Page 10: ...handled in this stage is particularly high use is make of an aluminum die cast radiator which is in direct contact with the rear chassis and serves to keep the transistor temperature low in order to i...

Page 11: ...red audio signals are adjusted to level by the volume control and amplified to I watt power by IC 2 Squelch At point J 5 higher frequency discriminator noise is taken at a selected level by the R1 squ...

Page 12: ...ince maximum operating frequency of ICI is low of 1C6 whose operating frequency is high divides the Q6 output frequency by 2 to give signals of approximately 3 MHz or less which are supplied to the pr...

Page 13: ...equal to VCC of Pin 5 when reference pulses and divider output have the same frequency When these inputs to 1C2 are not phase locked they have a width proportional to the phase difference of the inpu...

Page 14: ...F 2nd LO and noise amplification circuits The 9 V for transmit is similarly taken from emitter follower circuit Q32 from the clamp circuit constituted by Ri43 D22 D21 and is supplied to the IDC 10 7 M...

Page 15: ...0 0 0 0 144 645 17 145 245 144 045 0 0 0 1 0 0 0 1 144 660 18 145 260 144 060 0 0 0 1 0 0 1 0 144 675 19 145 275 144 075 0 0 0 1 0 0 1 1 144 690 20 145 290 144 090 0 0 0 1 0 1 0 0 144 705 21 145 305...

Page 16: ...0 0 1 1 1 1 0 1 145 320 62 145 920 144 720 0 0 1 1 1 1 1 0 145 335 63 145 935 144 735 0 0 1 1 1 1 1 1 145 335 63 145 935 144 735 0 0 1 1 1 1 1 1 145 350 64 145 950 144 750 0 1 0 0 0 0 0 0 145 365 65 1...

Page 17: ...0 1 0 145 995 107 146 595 145 395 0 1 1 0 1 0 1 1 146 010 108 146 610 145 410 0 1 1 0 1 1 0 0 146 025 109 146 625 145 425 0 1 1 0 1 1 0 1 146 040 110 146 640 145 440 0 1 1 0 1 1 1 0 146 055 111 146 65...

Page 18: ...0 1 1 0 0 1 146 700 154 147 300 146 100 1 0 0 1 1 0 1 0 146 715 155 147 315 146 115 1 0 0 1 1 0 1 1 146 730 156 147 330 146 130 1 0 0 1 1 1 0 0 146 745 157 147 345 146 145 1 0 0 1 1 1 0 1 146 760 158...

Page 19: ...0 0 0 1 1 0 147 375 199 147 975 146 775 1 1 0 0 0 1 1 1 147 390 200 147 990 146 790 1 1 0 0 1 0 0 0 147 405 201 148 005 146 805 1 1 0 0 1 0 0 1 147 420 202 148 020 146 820 1 1 0 0 1 0 1 0 147 435 203...

Page 20: ...1 0 1 1 0 0 147 945 237 148 545 147 345 1 1 1 0 1 1 0 1 147 960 238 148 560 147 360 1 1 1 0 1 1 1 0 147 975 239 148 575 147 375 1 1 1 0 1 1 1 1 147 990 240 148 590 147 390 1 1 1 1 0 0 0 0 148 005 241...

Page 21: ...Q11 0 05V 13 80V E 0 75V 0 35V E Squelch Closed Q12 0 65V 0 75V E 0 8 0V E Q13 1 35V 5 8V 0 8V Q14 1 35V 9 4V 0 75V Q15 0 26V 12 9V 0 90V 0 13 5V 0 7V Q16 12 9V 6 60V 13 70V 13 5V 13 8V 13 8V Q17 0 1...

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