artisan 8640B - Frequency Stability Vs Line Voltage Test

Model 8640B TM 9-4935-601-14-7&P
PERFORMANCE TESTS
4-14. FREQUENCY STABILITY VS TEMPERATURE TEST (Cont'd)
3. Set chamber for 350C. Again, allow Signal Generator to stabilize for two hours. Frequency change from reading
noted in step 2 should be less than 50 kHz.
__________________________ 50 kHz
4-15. FREQUENCY STABILITY VS LINE VOLTAGE TEST
SPECIFICATION:
Stability vs Line Voltage (+5% to -10% line voltage change): <1 ppm (normal mode).
NOTE
Stability specifications for phase lock mode are determined by counter time base reference. See
the internal reference tests.
DESCRIPTION:
A frequency counter is used to measure frequency shift as line voltage is changed +5% to -10%.
Figure 4-3. Frequency Stability us Line Voltage Test Setup
EQUIPMENT:
Frequency Counter.................................................................................................. HP 5327C
Variable Voltage Transformer............................................................................. GR W5MT3A
4-8
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