Technical data

Performance Verification
2400 Series Operation Manual, 33237 Revision A, May 2004 4-21
4.4.3 Performance Tests(2400M Series)
4.4.3.1 Amplitude Modulation Test
4.4.3.1.1 Description
The following procedures test Amplitude Modulation Accuracy and Bandwidth at frequencies within
each band. Because a Measuring Receiver is used to perform many of the tests, it is necessary to
include a second microwave source and a mixer to generate an IF (Intermediate Frequency) that is
within the frequency range of the receiver.
4.4.3.1.2 Equipment Required
• UUT
• Mixer/Divider
• Oscillator
• Measuring Receiver
4.4.3.1.3 Procedure (Amplitude Modulation Accuracy)
1. For test frequencies below the measuring receiver frequency range, connect the UUT directly to
the Measuring Receiver and proceed to step 4.
2. For test frequencies, greater than Measuring Receiver frequency range, connect the Local Oscilla-
tor, UUT, mixer and Measuring Receiver as shown in illustration 4.4.
3. Set the Local Oscillator frequency to 50 MHz above the UUT test frequency. For the 2440 series,
set the LO frequency to 50 MHz below the 40 GHz test frequency. Activate the RF output.
4. Set the Measuring Receiver for the following settings:
AM Active
(Peak-Peak)/2 Active
Filters: 50 Hz, 15 kHz
5. Set the Function Generator to 1 kHz Sine Wave, 2 V peak to peak and connect the output to the
AM IN BNC on the rear panel of the UUT. Note: Measure the output of the Function Generator
using a precision meter or oscilloscope to ensure the output of the function generator is 2 Vpp.