Reference Information - Epson RX8130CE Applications Manual

11. Reference Information

11.1. Reference Data
(1)Example of frequency and temperature characteristics
 = +25 C Typ.
T
 10 -6
 = -0.035  10
0
-50
-100
-150
-50 0
Temperature [C]
Figure 15 Frequency temperature characteristics
RX8130CE
ETM50E-07
-6
Typ.
50 100
Seiko Epson Corporation
[Finding the frequency stability]
1.Frequency and temperature characteristics can be
approximated using the following equations.
f =(  )
2
T T X
f
: Frequency deviation in any temperature
T
]
[1/C
2
: Coefficient of secondary temperature
(0.0350.005)10
[C] : Ultimate temperature (+255C)

T
[C]

: Any temperature
X
2.To determine overall clock accuracy, add the
frequency precision and voltage characteristics.
f/f=f/fo+f +f
T V
f/f
: Clock accuracy (stable frequency)
in any temperature and voltage.
f/fo
: Frequency precision
f
: Frequency deviation in any temperature.
T
f
: Frequency deviation in any voltage.
V
3.How to find the date difference
Date Difference = f/f  86400 s
 For example: f/f = 11.57410
approximately 1 second / day.
11. Reference Information
6 /C
2
-6
is an error of
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