Keysight U8903B - Wideband AC Flatness Verification; Table 3-11 Wideband Sine Wave Flatness Specifications

Performance Verification for Analog Analyzer 3
Keysight U8903B Service Guide 55
– Measurement function2: AC Voltage
– Sample size: 131072
– Low pass filter: 20 kHz
– High pass filter: 20 Hz
– Input voltage range: 0.32 V
3 Enable the U8903B analyzer input channels to be tested.
4 Record 10 measurements on the audio analyzer for each tested channel. Compute the
average of the 10 measurements for each tested channel as Noise
avg
in the “Test
record for residual noise verification” on page 117.
5 Compare the recorded Noise
avg
measurement value to the specification. If the test fails,
adjustment will need to be carried out accordingly.
Wideband AC flatness verification
This test verifies the wideband sine wave flatness of the U8903B analyzer by using the
function generator as a source and the digital multimeter as a reference, to ensure that it is
within the published specification.
1 Connect the function generator to the U8903B Unbalanced input channel 1 to be
tested and to the digital multimeter via the connection as shown in Figure 3-7. The
BNC-to-banana jack adapter and the BNC male-to-female T splitter is used for this
connection. Preset the U8903B, digital multimeter, and function generator.
Table 3-11 Wideband sine wave flatness specifications
Wideband sine wave flatness specification Equipment used
±0.1 dB (≤200 kHz)
±0.5 dB (≤1 MHz)
±1 dB (≤1.5 MHz)
Function generator
Digital multimeter
NOTE
Power on the U8903B audio analyzer for at least 30 minutes before performing the
performance verification.