EFJohnson 764X, 761X service manual Adjustment Procedure, Test Setup, Suggested Test Equipment

ADJUSTMENT PROCEDURE

SECTION 6 ADJUSTMENT PROCEDURE

	50 Ohm, 50W
	Load
	Wattmeter
	Frequency
	Monitor
	13.6 Volt, 17A
Programming Cable	Power Supply
Part No. 585-7500-031
	4.0 Ohm Speaker Load
Test Cable (Fabricated)
Figure 6-1	Test Setup

6.1 GENERAL

6.1.1 SUGGESTED TEST EQUIPMENT

The equipment that should be used to adjust this transceiver is listed in the following table.

Equipment	Grade and Range
DC power supply	Output voltage	13.6 VDC
	Current capacity	15A
RF power meter	Measuring range	1-50 W
	Freq range	146-512 MHz
	Impedance	50 ohms
	SWR	Less than 1.2:1
Frequency counter	Freq range	0.1-500 MHz
	Freq accuracy	±1 ppm or better
	Sensitivity	100 mV or better

Equipment	Grade and Range
FM deviation	Freq range	DC-520 MHz
meter	Measuring range	0 to ±10 kHz
Audio generator	Freq range	67-3000 Hz
	Output level	1-500 mV
Attenuator	Power atten.	50 or 60 dB
	Capacity	50W
Standard Signal	Freq range	146-520 MHz
Generator (SSG)	Output level	0.1 µV-32 mV
		(–127 to –17 dBm)
DC voltmeter	Input impedance	50kΩ/V DC or
		better
Oscilloscope	Freq range	DC-20 MHz
	Measuring range	0.01-20V
AC millivoltmeter	Measuring range	10 mV - 10V
External Speaker	Input Impedance	4 Ω
	Power Capacity	5 watts min.

	November 1998
6-1	Part No. 001-7600-001