Noise Sidebands < 50 kHz Offsets Performance Test

(Normal Variant Only)

This test verifies that the PSA meets its noise sidebands specifications for offsets less than 50 kHz from the center frequency.

In this test, the source is connected to the RF Input and the noise level is measured at offsets of 100 Hz, 1 kHz, 10 kHz, and 30 kHz from the carrier. The sideband power is then subtracted from the carrier power to convert the measurement to dBc.

The resulting dBc measurement is normalized to 1 Hz RBW, and 2.25 dB of corrections are added. The 2.25 dB corrections account for:

  1. The Rayleigh Distribution of noise (1.05 dB)

  2. The Log Response of the PSA (1.45 dB)

  3. Equivalent Noise Bandwidth of the RBW filters (-.25 dB)

This test is performed in conjunction with the Noise Sidebands > 50 kHz Offsets test.

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Required Test Equipment

Test Equipment

Model Number

Signal Source

PSG Models
(see equipment list)

BNC Cable

8120-2582 

3.5 mm Cable

8120-4921 

3.5 mm (f) to 3.5 mm (f) adapter
(for E4440A/43A/45A Option BAB)

1250-1749

Type-N (m) to 3.5 mm (f) adapter
(for E4440A/43A/45A)

1250-1744

2.4 mm (f) to 3.5 mm (f) adapter
(for E4446A/47A/48A)

11901B

Connection Setup