Section V
TM 11-6625-2781-14&P-2
ADJUSTMENT PROCEDURES (cont'd)
5-23. Tuning Range Adjustment
REFERENCE: Service Sheets 5, 8.
DESCRIPTION: After the first local oscillator has been adjusted, the tuning range is adjusted as a fine-tune step by
aligning the dial to 0 and 100 MHz. Intermediate points are then checked.
Figure 5-3. Tuning Range Adjustment Test Setup
EQUIPMENT:
Comb Generator ................................ ................................ ................................ ................................ ....... HP 8406A
Type N Male-to-BNC Female Adapter ................................ ................................ ................................ ..... UG-201A/U
Interconnecting Cable Assembly ................................ ................................ ................................ ..... HP 11592-60016
BNC Cable Assembly................................ ................................ ................................ .............................. HP 10503A
Extender Cable Assembly ................................ ................................ ................................ ............... HP 11592-60015
1. Connect the setup in Figure 5-3. Make the following control settings:
ANALYZER:
RANGE MHz ................................ ................................ ................................ ................................ ................... 0-110
FREQUENCY ................................ ................................ ................................ ................................ ............. 100 MHz
FINE TUNE................................ ................................ ................................ ................................ ................. Centered
BANDWIDTH ................................ ................................ ................................ ................................ ................. 10 kHz
SCAN WIDTH ................................ ................................ ................................ ................................ ....PER DIVISION
SCAN WIDTH PER DIVISION ................................ ................................ ................................ ..................... 0.2 MHz
TUNING STABILIZER................................ ................................ ................................ ................................ ........ OFF
INPUT ATTENUATION................................ ................................ ................................ ................................ .... 10 dB
SCAN TIME PER DIVISION ................................ ................................ ................................ ........ 5 MILLISECONDS
LOG REF LEVEL Controls ................................ ................................ ................................ ........................... -20 dBm
LOG/LINEAR ................................ ................................ ................................ ................................ ..................... LOG
BASE LINE CLIPPER ................................ ................................ ................................ ................................ ..Max ccw
5-8
