User manual

Publication No. 980935 Rev. M 3152B User Manual
Astronics Test Systems Performance Checks 6-3
Initial Instrument
Setting
To avoid confusion as to
what initial setting to use for each test, it is
required that the instrument be reset to factory default values prior to
each test.
Frequency
Accuracy
The Frequency Accuracy test verifies
the accuracy of the internal
oscillator. The internal oscillator determines the accuracy and stability
of the entire waveform generator.
The accuracy of the frequency
depends on the 10 MHz reference oscillator. Model 3152B defaults to
CLK10 which has 100 PPM accuracy.
The frequency accuracy of the output tests the internal TCXO because
its accuracy is much higher than the backplane CLK10. If both the
internal TCXO and the backplane CLK10 are insufficient for accuracy
purposes, an external 10
MHz reference clock can be applied to the
3151B.
The 10 MHz external reference i
nput is not available for the legacy
3152B.
21BFrequency
Accuracy, Internal
Reference
Equipment: Counter
Preparation:
1. Configure the counter as follows:
Termination: 50 Ω, DC coupled
2. Connect the 3152B output to the counter input – channel A.
3. Configure the 3152B as follows:
Waveform: Square wave
Amplitude: 2 V
Output: On
Frequency: As specified in Table 6-2
Test Procedure:
1. Perform frequency accuracy tests using Table 6-2.
Table 6-2, Frequency Accuracy
3152B Setting
Error Limits
Counter Reading
Pass
Fail
10.0000000 Hz
±10 µHz
100.000000 Hz
±0.1 mHz
1.00000000 kHz
±1 mHz
10.0000000 kHz
±10 mHz
100.000000 kHz
±100 mHz
1.00000000 MHz
±1 Hz
10.0000000 MHz
±10 Hz
100.0000000 MHz
±100 Hz