200 MHz IF Bandpass Adjustment

Section V

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

ADJUSTMENT PROCEDURES (cont' )

5-24. 200 MHz IF Bandpass Adjustment

DESCRIPTION: A fixed signal is connected to the RF INPUT while sweeping the 200 MHz IF circuits using the first local

oscillator. The second converter is bypassed and replaced with an external mixer also swept by the first local oscillator.

The swept 200 MHz passband is detected with the analyzer display and adjusted for best passband shape.

Figure 5-4. 200 MHz IF Bandpass Adjustment Test Setup

EQUIPMENT:

Signal Generator................................ ................................ ................................ ................................ ......... HP 606B

Amplifier ................................ ................................ ................................ ................................ ..................... HP 461A

Mixer ................................ ................................ ................................ ................................ ...................... HP 10514A

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

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

Test Cable (2) ................................ ................................ ................................ ................................ . HP 11592-60001

BNC Cable Assembly (2) ................................ ................................ ................................ ........................ HP 10503A

Cable Assembly (1)................................ ................................ ................................ ......................... HP 11592-60013

1. Connect the test setup in Figure 5-4 and make the following control settings:

ANALYZER:

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

FREQUENCY ................................ ................................ ................................ ................................ ............... 50 MHz

FINE TUNE................................ ................................ ................................ ................................ ................. Centered

BANDWIDTH ................................ ................................ ................................ ................................ ............... 300 kHz

5-10