artisan 8640B - Frequency Accuracy and Fine Tune Test

Model 8640B TM 9-4935-601-14-7&P
PERFORMANCE TESTS
4-11. FREQUENCY RANGE TEST (Cont'd)
3. Set FREQUENCY TUNE full counterclockwise. The frequency counter should read 230 MHz or less.
_______________________230.0 MHz
4. Set RANGE as shown below and check frequency at high and low ends of each band.
Range (MHz) Low End High End
512-1024* _______________<230.0 MHz >550.0 MHz ______________
128-256 _______________<115.0 MHz >275.0 MHz ______________
64-128 _______________<57.50 MHz >137.5 MHz ______________
32-64 _______________<28.80 MHz >68.70 MHz ______________
16-32 _______________<14.40 MHz >34.30 MHz ______________
8-16 _______________<7.200 MHz >17.10 MHz ______________
4-8 _______________<3.600 MHz >8.500 MHz ______________
2-4 _______________<1.800 MHz >4.200 MHz ______________
1-2 _______________<0.900 MHz >2.100 MHz ______________
0.5-1 _______________<0.450 MHz >1.070 MHz ______________
*No external doubler should be connected.
4-12. FREQUENCY ACCURACY AND FINE TUNE TEST
SPECIFICATION:
Accuracy: Total Counter Reference
Count = Resolution + Error
Accuracy (±1 count) (INT or EXT)
Internal Reference Error: <+2 ppm (when calibrated at 25°C every 3 months and operated between 15°C and
35°C).
When phase locked, Counter Resolution error is eliminated.
Fine Tuning: Unlocked, >200 ppm total range. Locked mode, >±20 ppm by varying internal time base vernier.
4-3
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