150 MHz Oscillator Adjustment

Section V

TM 11-6625-2781-14&P-2

ADJUSTMENT PROCEDURES (cont' )

5-25. 150 MHz Oscillator Adjustment

DESCRIPTION: The 150 MHz oscillator is adjusted with a nonmetallic screwdriver to 150 MHz ±10 kHz. the specified

operating frequency, output amplitude of the oscillator should be 150 to 230 millivolts rm During the adjustment caution

must be used to avoid damaging the tuning slug.

Figure 5-6. 150 MHz Oscillator Adjustment Test Setup

EQUIPMENT:

Vector Voltmeter ................................ ................................ ................................ ................................ ....... HP 8405A

Frequency Counter ................................ ................................ ................................ ......................... HP 5245L/5252A

Extender Cable Assembly ................................ ................................ ................................ ............... HP 11592-60015

Interconnecting Cable Assembly ................................ ................................ ................................ ..... HP 11592-60016

Cable Assembly ................................ ................................ ................................ .............................. HP 11592-60001

BNC Cable Assembly................................ ................................ ................................ .............................. HP 10503A

50-Ohm Tee ................................ ................................ ................................ ................................ ........... HP 11536A

Adapter, Male Type N to BNC Female ................................ ................................ ................................ .... UG-201A/U

10 dB Attenuator Pad................................ ................................ ................................ ................................ HP 8491A

Nonmetallic Tuning Tool

Type N Female to BNC Female Adapter ................................ ................................ ................................ ..FXR 21850

1. Connect test setup in Figure 5-6. Make the following control settings.

ANALYZER:

RANGE MHz ................................ ................................ ................................ ................................ ................... 0-110

FREQUENCY ................................ ................................ ................................ ................................ ................. 0 MHz

5-12