Performance Tests
Performance Tests
AVERAGE NOISE LEVEL TEST
AVERAGE NOISE LEVEL TEST
Specification
11970K:
11970A:
11970Q:
11970U:
11970V:
11970W:
Description
The average displayed noise level in a 1 kHz bandwidth, using external mixing with the 8566A/B Spectrum Analyzer, is checked at several LO power levels. This is accomplished by applying a known power to the input of the mixer. The difference between the amplitude of the known signal and the noise floor is measured. From these measurements, the average noise level in a 1 kHz bandwidth is calculated.
1.Connect an SMA cable from the spectrum analyzer LO OUTPUT to the INPUT of the 11975A Amplifier. Connect a second SMA cable to the amplifier OUTPUT.
2.For 11970K: Zero and calibrate the power meter. For 11970A, 11970Q, 11970U, 11970V
or 11970W: Connect the 478A Power Sensor to the power meter sensor cables, then zero the power meter.
3.On the 8566A/B Spectrum Analyzer, set the controls as follows:
SHIFT, DATA STEP [↑ ] KSU FREQUENCY SPAN, 0, Hz SHIFT, SWEEP, CONT, KSt CENTER FREQUENCY, 2, 4 [.] 5, GHz
CAUTION When you are using a 11975A Amplifier with a 11970 Series Mixer, you MUST set the amplifier
68 | Chapter 3 |
