Section 1: Verification procedures 3390 50 kHz Arbitrary Waveform / Function Generator Verification and Adjustment Manual
1-12
3390-905-01Rev. B / May 2016
Most power meters will require an attenuator or special power head to measure the +20 dB output.
2. Set up the function generator as follows:
Output impedance:
50 Ω by pressing
Utility
and select
Output setup
.
Waveform: Sine
Frequency: 100 KHz
Amplitude: 23.90 dBm
3. Make sure that the output is enabled.
4. Use the
Relative Power
function on the power meter to set the current reading as the reference
value. This will allow you to compare future measurement results in dB.
5. Set the power meter offset to equal the 100kHz_20dB_offset value previously calculated. This
sets the power meter to read the flatness error specification relative to 1 kHz.
100kHz_20dB_offset is calculated on the Amplitude and Flatness Verification Worksheet.
6. Set the 3390 to each output described in the table below and measure the output amplitude with
the power meter.
Keithley Instruments 3390
Measurement
Output setup Function
Amplitude
Frequency
Nominal
Error
50 Ω
Sine wave
+18 dBm
100.000 KHz
0 dB
±0.1 dB
50 Ω
Sine wave
+18 dBm
500.000 KHz
0 dB
±0.15 dB
50 Ω
Sine wave
+18 dBm
1.000 MHz
0 dB
±0.15 dB
50 Ω
Sine wave
+18 dBm
5.000 MHz
0 dB
±0.15 dB
50 Ω
Sine wave
+18 dBm
10.000 MHz
0 dB
±0.3 dB
5
0 Ω
Sine wave
+18 dBm
15.000 MHz
0 dB
±0.3 dB
50 Ω
Sine wave
+18 dBm
17.000 MHz
0 dB
±0.3 dB
50 Ω
Sine wave
+18 dBm
20.000 MHz
0 dB
±0.3 dB
50 Ω
Sine wave
+18 dBm
25.000 MHz
0 dB
±0.5 dB
50 Ω
Sine wave
+18 dBm
29.000 MHz
0 dB
±0.5 dB
50 Ω
Sine wave
+18 dBm
37.000 MHz
0 dB
±0.5 dB
50 Ω
Sine wave
+18 dBm
47.000 MHz
0 dB
±0.5 dB
50 Ω
Sine wave
+18 dBm
50.000 MHz
0 dB
±0.5 dB
7. Compare the measured output to the test limits shown in the table.
