Anritsu MG3641A - Manual (Page 182)

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