Model 10811A/B
13
f. For example, if the trace moves 1 division in 10 seconds and the sweep speed is 0.01
μ
s/div., the
oscillator's frequency is 1 x 10
-9
different from that of the reference frequency, as can be seen
from the calibration,
. The calculation can also be made by the following formula:
where
Δ
f/f = offset of the oscillator with respect to the reference standard
Δ
t = the movement of the
oscilloscope pattern (1 div. X .01
μ
s/div.) = .01,
μ
s t = time required for
Δ
t to occur.
Figure 3-1. Oscillator Adjustment Set-Up
3-10. ACCURACY VS ADJUSTMENT INTERVAL
3-11.
shows the required adjustment interval to maintain a required accuracy. If the aging
rate is known to be 3 x 10
-10
/day, then a more precise adjustment interval can be determined.
(The specification for aging is <5 X10
-10
/day, but aging is typically less than this.) The aging rate
can be expected to gradually decrease, and typically will reach 1 X 10
-10
/day within 1-year.
Example:
Known aging rate···········································3 X 10
-10
/day
Maximum allowable error ·····························5 X 10
-9
Содержание 10811A
Страница 2: ...Model 10811A B Page Intentionally Left Blank ...
Страница 3: ...Model 10811A B ...
Страница 9: ...Model 10811A B 1 Figure 1 1 10811A and 108118 Oscillators ...
Страница 23: ...Model 10811A B 15 Page Intentionally Left Blank ...
Страница 31: ...Model 10811A B 23 Page Intentionally Left Blank ...
Страница 32: ...Model 10811A B 24 Table 4 4 Operational Verification Record ...
Страница 44: ...Model 10811A B 36 Page Intentionally Left Blank ...
Страница 46: ...Model 10811A B 38 Page Intentionally Left Blank ...
Страница 48: ...Model 10811A B 40 Figure 8 1 Schematic Diagram Notes ...
Страница 65: ...Model 10811A B 57 Table 8 2 Oven Controller Troubleshooting Tree ...
Страница 70: ...Model 10811A B 62 Page Intentionally Left Blank ...
Страница 71: ...Model 10811A B 63 ...
Страница 72: ...Model 10811A B 64 Figure 8 15 Oven Controller Schematic Diagram ...
Страница 73: ...Model 10811A B 65 ...