Anritsu MG3641A User Manual

SECTION 8   CALIBRATION

8-2

8.3

Calibration

For the MG3641A/MG3642A, calibrate the frequency of the built-in Reference oscillator  once a half year.

The stability of the MG3641A/MG3642A 10 MHz reference crystal oscillator is 

±5 × 10

-9

 per day.  Therefore, as the

frequency standard, use a standard signal generator that receives the typical radio wave and subcarrier of the color

telecasting (signal locked to the rubidium atomic standard) and issues a signal locked to it.

(1) Calibration specifications

• Reference oscillator (standard)

– Frequency

10 MHz

– Aging rate

±5 × 10

-9

/day

– Activation characteristics

1 

× 10

-7

/10 min. (reference after 24 hour operation)

– Temperature characteristics

±3 × 10

-8

 (0 to 50

°C)

• Reference oscillator (Opt 01)

– Frequency

10 MHz

– Aging rate

5 

× 10

-10

/day

– Temperature characteristics

±5 × 10

-9

 (0 to 50

°C)

(2) Measuring instruments for calibration

• Oscilloscope

• Frequency standard