波形发生器33210A精度规格在1年校准间隔后无效

您好！有人可以帮我理解校准和调整的意义。在波形发生器33210A的手册中，它说：“对于大多数应用来说，1年间隔是足够的。只有在调整时，精度规格仍然有效。
定期校准间隔。精度规格在1年校准间隔后无效。安捷伦建议不要将校准间隔延长超过2年。规格仅在上次调整规定的时间内有效。无论您选择何种校准间隔，
安捷伦建议始终在校准间隔内进行完全重新调整，这对于确保仪器在下一个校准间隔内保持在规格范围内是必要的。重新调整的标准提供了最佳的长期稳定性。
性能验证测试并不意味着仪器将保留在这些中
除非进行调整，否则将进行调整。“因此，校准应在1年内进行，调整情况如何？我的问题是，如果您在一年或两年内校准设备，是否需要内部重新调整？或内部重新调整是
在内部进行校准的方法？感谢您的帮助，问候，André



     以下为原文

  Hello!

Can anybody please help me understand the calibration and adjustment meaning.

In the manual of the 33210A, Waveform generator, it said:

"A 1-year interval is adequate for most applications. Accuracy specifications will remain valid only if adjustment is made at regular calibration intervals. Accuracy specifications are not valid beyond the 1-year calibration interval. Agilent does not recommend extending calibration intervals beyond 2 years for any application.


Specifications are valid only within the period stated from the last adjustment. Whatever calibration interval you select, Agilent recommends that complete re-adjustment always be performed at the calibration interval. This is necessary to ensure that the instrument will remain within specification for the next calibration interval. This criteria
for re-adjustment provides the best long-term stability. Performance data measured during Performance Verification Tests does not mean that the instrument will remain within these limits unless the adjustments are performed."

So, calibration should be done in 1-year and what about adjustments?
My question is, if you calibrate the equipament during one year or two, does it needs internal readjustments?
or the internal readjustments are a way to do the calibration internally?


Thank you for the help,

Regards,

André