Adjustment Procedures, Preparation Before Sarvicing

SECTION 5 ADJUSTMENT PROCEDURES

4-1 PREPARATION BEFORE SARVICING

■REQUIRED TEST EQUIPMENT

EQUIPMENT	GREDE AND RANGE		EQUIPMENT	GREDE AND RENGE

DC power supply	Output voltage	: 13.8 V DC	Audio generator	Frequency range	: 300–3000 Hz
	Current capacity	: 30 A or more		Measuring range	: 1–500 mV


	Measuring range	: 1–150 W	Standard signal	Frequency range	: 0.1–1500 MHz
RF power meter	Frequency range	: 120–1500 MHz		Output level	: 0.1 µV–32 mV
			generator (SSG)
(terminated type)	Impedance	: 50 Ω			(–127 to –17 dBm)

	SWR	: Less than 1.2 : 1
			AC millivoltmeter	Measuring range	: 10 mV–10 V

	Frequency range	: 0.1–100 MHz

			DC voltmeter	Input impedance	: 50 kΩ/V DC or better
Frequency counter	Frequency accuracy	: ±0.5 ppm or better

	Sensitivity	: 100 mV or better	DC ammeter	Measurement capability: 1 A/30 A
	Frequency range	: 0.1–500 MHz
RF voltmeter			Spectram analyzer	Frequency range	: At least 150 MHz
	Measuring range	: 0.01–10 V		Spectraum bandwidth	: 100 kHz or more


FM deviation meter	Frequency range	: DC–500 MHz	Attenuator	Power attenuation	: 50 or 60 dB
	Measuring range	: 0 to ±5 kHz		Capacity	: 150 W or more


Distortion meter	Frequency range	: 1 kHz ±10 %	External speaker	Input impedance	: 8 Ω
	Measuring range	: 1–100 %		Capacity	: 5 W or more

Oscilloscope	Frequency range	: DC–20 MHz	Terminator	Resistance	: 50 and 150 Ω
	Measuring range	: 0.01–20 V		Capacity	: 150 W or more

Digital multimeter	Imput impeadance	: 10 MΩ/DC or beter

‘CONNECTIONS

CAUTION !

DO NOT transmit while an SSG is connected to the antenna connector.

CAUTION !

When [P.AMP] switch is turned ON, DC voltage is applied to the antenna connector. This may damege the signal generator.

Standard signal

generator

DC power supply

Ammeter

to [DC 13.8 V]

connector

Attenuator

FM deviation meter

Spectrum analyzer

Distortion meter

to [EXT SP]

the antenna

RF power meter

Speaker

TERMINATOR for software adjustment (page 5-12).

2-conductor 3.5 (d) mm (1/8") Shouten inner and outer plugs.

IC-910H

Audio generator

[MIC]

PTT

JIG cable (A)

2.2 k

JIG cable (B)

+9 V

2.2 k

5 - 1

IC-910H specifications

The Icom IC-910H is a highly regarded and versatile transceiver that is designed for amateur radio operators who are particularly interested in V/UHF and microwave communications. Known for its exceptional performance, the IC-910H encompasses a suite of features that make it a standout choice for both casual and dedicated hams.

One of the main features of the IC-910H is its dual-band capability, allowing for simultaneous operation on both 144 MHz (2 meters) and 430 MHz (70 centimeters) bands. This dual operation enables users to engage in various communication modes, including SSB, CW, FM, and digital. Its high frequency stability ensures that users can rely on the transceiver for accurate and consistent transmissions.

The IC-910H is equipped with a high-performance 10 MHz IF filter that improves selectivity and reduces adjacent channel interference. The optional 1.2 GHz module enhances the transceiver’s capabilities, allowing operators to venture into microwave frequencies. This expandability is a significant advantage for users who wish to progress in their amateur radio pursuits.

Another notable aspect of the IC-910H is its large, easy-to-read LCD display, which features various color options for enhanced visibility. The front panel layout is user-friendly, providing quick access to important controls and functions. The built-in DSP (Digital Signal Processing) technology offers noise reduction and filtering capabilities, significantly improving overall audio quality and making weak signals more intelligible.

The transceiver also includes extensive memory functions, with up to 1,000 memory channels available for storing frequencies, modes, and operational settings. Additionally, it supports CTCSS and DCS tones, which facilitate the use of repeater systems and private group communications.

In terms of build quality, the IC-910H features a robust construction designed for durability and long-term use. Its efficient power supply management ensures excellent performance while minimizing heat generation, making it suitable for extended operating sessions.

Overall, the Icom IC-910H is a powerful and feature-rich transceiver that is favored by many amateur radio enthusiasts. With its versatile operating modes, advanced filtering capabilities, and clear display, it stands out as a reliable tool for both casual operators and serious DXers. Its well-thought-out design and comprehensive features make it a valuable addition to any ham's station collection.

Icom IC-910H Adjustment Procedures, Preparation Before Sarvicing, Required Test Equipment

Models: IC-910H