Icom IC-720 Instruction Manual page 4

FEATURES:
Congratulations on the purchase of ICOM's ІС-720. This fine piece of equipment represents ICOM's advanced digital
technology and knowledge in the field that have produced an HF transceiver with a general coverage receiver, from 100KHz
to 30MHz in 1MHz steps. This, combined with features ICOM has found, are most wanted by Amateurs, serves to make this
the finest in the HF field. The all solid state circuits, driver and final power stages provide about 100 Watts output with all
the attendant convenience and long life. The ІС-720 is an all mode, 30 band transceiver offering SSB, CW, and RTTY.
With the Band Up/Down control the frequency can be changed in 1MHz steps in the General Coverage mode, and will change
the Ham bands from one band to the next when pushed. The band change will continue up to 28MHz, then revert to the
lowest band if pushed continuously.
DUAL 10Hz STEP DIGITAL VFO
The dual digital VFO consists of the PLL Unit which has a triple looped Phase Locked Loop and the LOGIC Unit to control
the PLL which has a Microcomputer Control System.
Three tuning frequency resolutions of 10Hz, 100Hz and 1KHz steps are selectable with the TS button and the DIAL SELECT
switch.
Two separate VFO's can be used independently іп the SIMPLEX operation, апа any desired frequency split transmit/receive
in the DUPLEX operation.
OUTSTANDING RECEIVER PERFORMANCE
The ІС-720 employs a dual conversion superheterodyne system which has the first IF 39.7315МН2 and а second IF 9.0115
MHz.
The RF amplifier circuit is a wide band push-pull amplifier using low-noise апа wide dinamic range junction FETs, and the
mixer is a high level Double Balanced Mixer developed by ICOM.
These advanced devices and systems give higher spurious response rejection ratio, higher sensitivity, and wider dynamic range.
PASS BAND TUNING AND SPEECH PROCESSOR
The ІС-720 has a built-in Pass Band Tuning system developed by ІСОМ that allows you to continuously adjust the pass band
of the IF. By turning the control, you can eliminate interference from a nearby signal, thus providing clear reception. It can
also be used as a tone control. During transmit, the Pass Band Tuning circuit can be used as a Speech Processor providing
increased "talk power" for outstanding О Xing.
ADDITIONAL CIRCUITS
The ІС-720 has a built-in Noise Blanker, VOX, CW Monitor, APC, SWR detector, and many other circuits for your
convenience.
Тһе ІС-720 has everything you need to really enjoy HF operation, іп an extremely compact, rugged transceiver.
МАКС 79 FREQUENCIES
Ше а