Omicron Lab Bode 100 Manuale utente
Smart Measurement Solutions®
Bode 100 - Information
Detailed Functional & Calibration Check of
Bode 100
Table of Contents
1CHECK OF FACTORY CALIBRATION ..............................................................................................................2
1.1 TEST OF OUTPUT SIGNAL SHAPE ...................................................................................................................................2
1.2 ACCURACY OF OUTPUT FREQUENCY.............................................................................................................................4
1.3 ACCURACY OF OUTPUT LEVEL.......................................................................................................................................6
1.4 ACCURACY OF GAIN/PHASE FACTORY CALIBRATION....................................................................................................7
1.5 NOISE FLOOR /CHANNEL ISOLATION...........................................................................................................................10
1.6 ACCURACY OF IMPEDANCE CALIBRATION....................................................................................................................12
1.7 QUICK CHECK OF ATTENUATORS.................................................................................................................................14
1.8 CHECK OF ATTENUATOR CORRECTION........................................................................................................................16
1.9 QUICK CHECK OF AC COUPLING CAPACITORS AT INPUT CHANNELS 1&2.................................................................18
1.10 CHECK OF INTERNAL CONNECTIONS &OUTPUT IMPEDANCE....................................................................................19
2CALIBRATION SERVICE...................................................................................................................................20
By Bernhard Baumgartner & Tobias Schuster
© 2008-2020 by OMICRON Lab –V4.0
Visit www.omicron-lab.com for more information.
Contact support@omicron-lab.com for technical support.
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
Page 2 of 21
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1 Check of factory calibration
The following checks will help you to decide if it is required to send the Bode 100 to OMICRON Lab
for calibration.
Note: It is assumed that the user manual of the Bode 100 was read and understood prior the
measurements described in this document are executed. If you do not have a manual at
hand you can download it at https://www.omicron-lab.com/downloads/vector-network-
analysis/bode-100/.
1.1 Test of output signal shape
Measurement Setup:
Please connect the Source output of Bode 100 to an oscilloscope
Equipment Setup:
Please select the measurement type “Gain / Phase”, select the source settings as follows and start a
continuous measurement:
Frequency: 10 MHz - Fixed
Output level: 0 dBm
Figure 2: test signal shape - measurement type setting
Figure 1: test signal shape - connection setup
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
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Figure 3: test signal shape - measurement settings
Figure 4: test signal shape - start continuous measurement
Expected Measurement result:
Figure 5: test signal shape - expected result
Waveform: sinusoidal
Vpeak-peak: ~ 1.26 Volts (more accurate measurement follows)
Frequency: ~ 10 MHz (more accurate measurement follows)
If the waveform looks nice, the source amplifiers are working properly.
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
Page 4 of 21
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1.2 Accuracy of output frequency
Measurement Setup:
Please connect the output of the Bode 100 to a frequency counter which is locked to a high stable
frequency normal (e.g. Rubidium, GPS etc.).
Figure 6: output frequency accuracy - connection setup
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
Page 5 of 21
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Equipment Setup:
Please select the measurement type “Gain / Phase”, select the source settings as follows and start a
continuous measurement:
Frequency: 10 MHz - Fixed
Output level: 0 dBm
Figure 7: output frequency accuracy - measurement type setting
Figure 8: output frequency accuracy - measurement setting
Figure 9: output frequency accuracy - start continuous measurement
Expected Measurement result:
Measured frequency: 10 MHz
Maximum tolerance for Bode 100 Revision 1:
± 15 ppm ≙± 150 Hz @ 10 MHz (< 1 year after adjustment)
± 25 ppm ≙± 250 Hz @ 10 MHz (< 3 years after adjustment)
Maximum tolerance for Bode 100 Revision 2:
± 2 ppm ≙± 20 Hz @ 10 MHz (< 1 year after adjustment)
± 4 ppm ≙± 40 Hz @ 10 MHz (< 3 years after adjustment)
If you measure a higher frequency deviation, please send the Bode 100 in for calibration / adjustment.
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
Page 6 of 21
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1.3 Accuracy of output level
Measurement Setup:
Please connect the Source output of Bode 100 to a calibrated 50 Ωpower meter.
Figure 10: output level accuracy - connection setup
Equipment Setup:
Please select the measurement type “Gain / Phase”, select the source settings as follows and start a
continuous measurement:
Frequency: 1 MHz –Fixed (or whatever frequency your power meter is made for)
Output level: 0 dBm / 13 dBm / -27 dBm
Figure 11: output level accuracy - measurement type setting
Figure 12: output level accuracy - measurement settings
Figure 13: output level accuracy - start continuous measurement
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
Page 7 of 21
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Expected Measurement result:
Measured output power: 0 dBm / 13 dBm / - 27 dBm
Measured output power tolerance @ 23°C ± 5°C:
max. ± 0.3 dB (1 Hz to < 1 MHz)
max. ± 0.6 dB (1 MHz to 40 MHz for Bode 100 R1)
max. ± 0.6 dB (1 MHz to 50 MHz for Bode 100 R2)
If you measure a higher power deviation, please send in the Bode 100 for calibration / adjustment.
1.4 Accuracy of Gain/Phase factory calibration
Measurement Setup:
Connect the Source of Bode 100 to the two inputs using the cables and the
T-BNC Adapter delivered with Bode 100.
Figure 14: gain/phase accuracy - connection setup
Equipment Setup:
Please select the measurement type “Gain / Phase” and apply the following settings in the hardware
setup:
Figure 15: gain/phase accuracy - gain/phase measurement
Figure 16: gain/phase accuracy - open hardware setup
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
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Figure 17: gain/phase accuracy - hardware setup
Figure 18: gain/phase accuracy - measurement settings
Then start a single measurement.
Figure 19: gain/phase accuracy - start single sweep
For better visibility change the chart setup to “one axis per chart” as well as set the trace settings as
can be seen below:
Figure 20: gain/phase accuracy - chart setup
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
Page 9 of 21
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Figure 21: gain/phase accuracy - trace settings
Expected Measurement results:
Gain: 0 dB
Tolerance: max. ± 0.2 dB from 1 Hz to 50 MHz
Phase: 0°
Tolerance: max ± 3° from 1 Hz to 50 MHz
If you measure a higher gain/phase deviation please send in the Bode 100 for calibration /
adjustment.
The following measurement results are an example and can be slightly different from the
measurement with other devices.
Figure 22: gain/ phase accuracy –magnitude (dB) measurement
Bode 100 - Information
Detailed Functional & Calibration Check of Bode 100
Page 10 of 21
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Figure 23: gain/phase accuracy - phase (°) measurement
1.5 Noise floor / Channel isolation
Measurement Setup:
Disconnect all BNC cables from Bode 100.
Do not connect anything to the front side BNC connectors!
Equipment Setup:
Please select the measurement type “transmission / reflection” and apply the following settings:
Figure 24: dynamic range / isolation - transmission / reflection measurement
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3
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