Icom IC-211 User Manual

Describes the transceiver's capabilities and frequency range.

Details the use of LSI and digital PLL for frequency control.

Highlights MOS FETs, excellent selectivity, sensitivity, and stability.

Advice on placement, ventilation, and handling of the unit.

Details on connecting the unit to AC and DC power sources.

Details on connecting and using the microphone.

Importance and method of establishing a proper ground connection.

Identifies and labels all controls and indicators on the front panel.

Explains how to adjust microphone gain for proper modulation.

Selects and controls two VFOs for various transmit/receive operations.

Adjusts frequency in 100Hz or 5KHz steps.

Acts as S-meter in receive and output power in transmit.

Connects the antenna to the set via a PL 259 connector.

Controls power supply to memory circuit for frequency retention.

Provides instructions for tuning frequency in any mode.

Selects and controls two VFOs for various transmit/receive operations.

Sets controls for SSB receiving, including mode selection and tuning.

Procedures for transmitting in SSB mode, including microphone use.

Sets controls for CW reception, including mode and beat tone tuning.

Procedures for transmitting in CW mode.

Sets controls for FM reception, including mode and squelch adjustment.

Procedures for transmitting in FM mode, including RF power adjustment.

Guides on using the built-in VSWR meter for antenna matching.

Lists uplink/downlink frequencies for AMSAT OSCAR satellites.

Describes accessory socket connections and voltage limits.

Identifies components and adjustment points on the main PC board.

Identifies components and adjustment points on the PLL unit board.

Overview of PLL circuit, frequency determination, and signal path.

Explains RF Amplifier, Mixer, Noise Blanker, SSB IF Amplifier, Detector, BFO, AGC circuits.

Explains the balanced modulator for generating DSB signals.

Explains the local oscillator circuit for frequency determination.

Details the LSI chip's functions for PLL control and frequency selection.

Controls SL signal for VFO selection based on logic levels.

Describes the 7-segment LED indicators and their drivers.

Addresses problems with power connection, polarity, fuse, and jumper plug.

Covers AF gain, transmit mode, squelch setting, and speaker connections.

Addresses RF gain control, antenna feed line, and signal strength.

Addresses RF power setting, MIC gain, mode selection, and PTT switch.

Details the LED indicators and drivers for frequency display.

Shows VFO switch connections to logic and control circuits.

Describes an optional mounting bracket for mobile installation.

Describes an optional remote controller for frequency selection.