12. 10 MHz Reference Adjustment (Non-Option 003 only)

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

10 MHz Reference Output Accuracy

Description

The frequency counter is connected to the CAL OUTPUT, which is locked to the 10 MHz reference. This yields better effective resolution. The temperature-compensated crystal oscillator (TCXO) is adjusted for a frequency of 300 MHz as read by the frequency counter.

FREQUENCY COUNTER

PC

BOARD

PROP

S K 1 1 4

Figure 2-15. 10 MHz Frequency Reference Adjustment Setup

Equipment

Microwave Frequency Counter . . . . . . . . . . . . . . . . . . . . . . . . . . HP 5343A Option 001

Cables

BNC,122cm (48in) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

Procedure

Note

Allow the HP 8560A to warm up for at least 30 minutes before performing

 

this adjustment.

 

 

1.Connect the equipment as shown in Figure 2-15. Prop up the Al4 Frequency Control Assembly.

2.Set the HP 5343A controls as follows:

SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Midrange

5052-1Mfl SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500

10 Hz-500 MHz/500 MHz-26.5 GHz SWITCH . . . . . . . . . . . . . . . . 10 Hz-500 MHz

2-50’ Adjustment Procedures