artisan 8640B - Frequency Stability Vs Temperature Test

Model 8640B TM 9-4935-601-14-7&P
PERFORMANCE TESTS
4-14. FREQUENCY STABILITY VS TEMPERATURE TEST
SPECIFICATION:
Stability vs Temperature: <50 ppm/°C (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 drift as temperature is changed. A temperature controlled chamber is used to
vary the temperature.
Figure 4-2. Frequency stability Us Temperature Test Setup
EQUIPMENT:
Frequency Counter.................................................................................................. HP 5327C
Temperature Controlled Chamber.............................................................. Statham Model 325
PROCEDURE:
1. Connect equipment as shown in Figure 4-2 after setting Signal Generator's controls as follows:
COUNTER MODE: EXPAND...................................................................................Off
LOCK........................................................................................Off
Source ..................................................................................... INT
AM............................................................................................................................................................OFF
FM............................................................................................................................................................OFF
RANGE ..........................................................................................................................................32-64 MHz
FREQUENCY TUNE ...........................................................................................................................50 MHz
RF ON/OFF................................................................................................................................................ON
2. Set temperature controlled chamber for 150C. Allow Signal Generator to stabilize for two hours. Then note
frequency counter reading.
4-7
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