Keysight U8903B, Руководство по обслуживанию

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Performance Verification for Analog Generator 2
Keysight U8903B Service Guide 29
Sine wave frequency accuracy verification
This test verifies the sine wave frequency accuracy of the signal generated by the U8903B
using a frequency counter to ensure that it is within the published specification.
1 Connect the U8903B Unbalanced output channel 1 to the frequency counter channel 1
and Unbalanced output channel 2 to the frequency counter channel 2 as shown in
Figure 2-3 . Preset both the U8903B and the frequency counter.
Figure 2-3 U8903B to frequency counter connections for frequency accuracy verification
2 Configure the frequency counter input channels as follows:
– If frequency counter model is 53220A, set SCPI language mode: 53132A
– Impedance: 1 M
Ω
– Low pass filter: ON
– Input coupling: DC
– Level at center of hysteresis window: 0 V
– Trigger level percentage of signal peak-to-peak range: 50%
– Reference timebase: Internal reference
– Measurement function: Channel 1 frequency
– Frequency measurement start arm mode: Immediate
– Frequency measurement stop arm mode: Timer
3 Configure the U8903B output channels to be tested as follows:
– Connection type: Unbalanced
– Output impedance: 600 Ω
– Output grounding configuration: Floating ground
Table 2-3 Frequency accuracy specifications
Frequency accuracy specification Equipment used
±
(2 ppm + 100
μ
Hz) Frequency counter
Unbalanced output
channel 1
U8903B audio
analyzer
Frequency
counter
Unbalanced output
channel 2