4 RECEIVE FUNCTIONS

Initial settings

Before turning power ON, set controls and switches as indicated below:

[AF GAIN]: 10 o’clock

[SQUELCH]: max. CCW

SCAN SET

[APF]: center

[IF SHIFT]: center

After turning power ON,

check the display for indications below and remove as follows:

Push [SLEEP]

Push and hold [SPCH • LOCK]

Push [NB/AFC]

 

FM

OFF DLY

SLEEP

 

LOCK

kHz

 

 

 

 

 

 

NB AFC AGC-F APF-N

BANK

RECV

 

 

 

10-ATT-20

 

*ICOM IC-R8500

 

 

 

 

 

 

 

Push [AGC]

Push [10dB] and/or [20 dB]

Mode selection

Push one of the mode keys one or more times to select the desired mode. Consult the table below for basic characteristics of each mode.

The indications in the table appear in the bank name area for 1 sec. after an operating mode is selected.

MODE

BANDWIDTH

INDICATION

DESCRIPTION

FM

normal

12 kHz/–6 dB

 

Amateur bands, citizens band, utility communications, marine bands,

 

 

 

etc. FM-narrow can only receive narrow FM signals; normal FM can

narrow

5.5 kHz/–6 dB

 

 

 

receive both normal and narrow FM signals.

 

 

 

 

 

 

medium

5.5 kHz/–6 dB

 

Broadcasting, amateur bands, citizens band, air band, etc. AM-wide

AM

 

 

 

wide

 

 

12 kHz/–6 dB

 

mode is used for clear audio reception. Signals however, may be

 

 

 

 

received with interference.

 

narrow

2.2 kHz/–6 dB

 

 

 

 

 

 

 

 

 

SSB

USB

 

 

Shortwave broadcasting, amateur bands, etc. Use USB for normal

 

2.2 kHz/–6 dB

 

LSB

 

SSB reception; LSB is not normally used.

 

 

 

 

 

 

 

 

 

 

 

 

CW

normal

2.2 kHz/–6 dB

 

Morse code communications. Use this mode to receive radio-tele-

 

 

 

narrow

500 Hz/–6 dB

 

type, etc. by shifting the receive frequency.

 

 

 

(option)

 

 

 

WFM

 

150 kHz/–6 dB

 

TV broadcasting, FM broadcasting, etc. TV and FM broadcasting

 

 

cannot be accessed in FM mode because their signals are too wide.

 

 

 

 

 

 

 

 

 

13

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Icom IC-R8500 instruction manual Receive Functions, Initial settings, Mode selection

IC-R8500 specifications

The Icom IC-R8500 is a highly regarded general-purpose receiver that has made its mark among amateur radio enthusiasts and professionals alike. This versatile communication receiver is known for its wide frequency coverage, advanced features, and robust design, making it a valuable tool for various applications, including shortwave listening, public safety communication, and aircraft monitoring.

One of the standout features of the IC-R8500 is its extensive frequency coverage. It spans a range from 0.1 MHz to 3 GHz, allowing users to access a wide spectrum of signals. The receiver includes coverage of HF, VHF, UHF, and even microwave bands, making it suitable for listening to everything from amateur radio transmissions to satellite communications.

The receiver employs a high-performance double-conversion superheterodyne architecture, which contributes to its excellent sensitivity and selectivity. The advanced RF circuitry minimizes interference and enhances the clarity of received signals. Users can expect outstanding audio quality and a wide dynamic range, even in challenging reception conditions.

Digital Signal Processing (DSP) is another key technology incorporated into the IC-R8500. The DSP capabilities allow users to apply noise reduction and filtering techniques to improve the quality of the received audio. Features such as automatic notch filtering and IF filtering help eliminate unwanted noise, enhancing the listening experience.

The IC-R8500 is equipped with a large, easy-to-read LCD display that provides information on frequency, mode, signal strength, and other essential parameters. The user-friendly interface simplifies operation, allowing quick access to various settings and functions. Additionally, the receiver supports various modulation modes, including AM, FM, SSB, and CW, catering to different listening preferences.

For those seeking enhanced connectivity, the IC-R8500 offers multiple options, including an audio output jack, and external speaker connections. It also has a built-in memory function, allowing users to store and recall favorite frequencies easily. The receiver can be controlled via a computer interface, offering versatility for advanced users and programmers.

In summary, the Icom IC-R8500 stands out for its wide frequency range, superior sensitivity, and advanced features powered by DSP technology. Its robust construction and user-friendly design make it a favorite among communications enthusiasts seeking a reliable and versatile receiver for various applications. Whether for hobbyist listening or professional use, the IC-R8500 remains a top choice in the world of radio receivers.