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Icom IC-22S PLL Synthesized 2-Meter Transceiver

Instruction Manual and Service Notes

SECTION I.
Specifications

GENERAL

Semiconductor Complement

Transistors

FET

Diodes

33 to 128 depending on channels

Frequency Range (for specification)

146-148 MHz

Voltage

13.8 Volts DC (negative ground)

Current Required

2.0 amps @ 10 Watts 0.9 Amps @ 1
Watt

0.7 amps at maximum audio

0.4 amps squelched audio

Size

58 mm (H) x 156 mm (W) x 218 mm (D)

Weight

1.9 kilograms

Antenna Impedance

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

10 watts or 1 watt (selectable)

Modulation Width

5 KHz

Microphone Impedance

500 ohms

Spurious Level

Lower that –60 db below carrier

RECEIVER

Modulation Acceptance

16F3

Type

Double Superhetrodyne
1

s t

IF 10.7 MHz

IF 455 KHz

Receiver Sensitivity

4 db below 1 uV or lower (0.4 micro)

1 uV S+N/N

30 db or better S+N/N

Spurious Response

60 db or more attenuation

Bandpass

+/-7.5 KHz: -6 db
+/-15 KHz: -60 db

Squelch Sensitivity

-8 db below 1 uV

Audio Output

1.5 watts or more into 8 ohms

Содержание IC-22S

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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