Noise figure and gain

N8973A, N8974A and N8975A

Noise source ENR

(10 MHz to 3.0 GHz)

4-7 dB

12-17 dB

20-22 dB

Noise figure

Measurement range

0 to 20 dB

0 to 30 dB 0 to 35 dB

Instrument uncertainty

± < 0.05 dB

± < 0.05 dB ± < 0.1 dB

Measurement range

-20 to +40 dB

Instrument uncertainty

± < 0.17 dB

N8974A and N8975A

Noise source ENR

(>3.0 GHz)

4-7 dB

12-17 dB

20-22 dB

Noise figure

Measurement range

0 to 20 dB

0 to 30 dB 0 to 35 dB

Instrument uncertainty

± < 0.15 dB

± < 0.15 dB ± < 0.2 dB

Measurement range

-20 to +40 dB

Instrument uncertainty

± < 0.17 dB

For NFA models that either have a serial prefix less than GB4446 or are fitted with the

Noise Figure RF board, N8972-60001.

Instrument’s own noise figure

For NFA models that either have a serial prefix greater than GB4446 or are fitted with the

Noise Figure RF board, N8972-60101.

Instrument’s own noise figure

3

1.

Excess noise ratio

2.

For measurement bandwidths below 4 MHz, and spacing between measurement points below 3 MHz,

gain uncertainty may increase to a maximum of ± 0.7 dB.

Frequency

Noise figure

Noise figure over a limited

temperature range of 23° C ± 3° C

10 MHz to 3.0 GHz

< 4.8 dB + (0.00124 * freq in MHz)

< 4.4 dB + (0.00117 * freq in MHz)

> 3.0 GHz to 13.2 GHz

< 12.0 dB

< 10.5 dB

> 13.2 GHz to 26.5 GHz

< 16.0 dB

< 12.5 dB

Frequency

Noise figure

Noise figure over a limited

temperature range of 23° C ± 3° C

10 MHz to < 500 MHz

< 4.9 dB + (0.0025 * freq in MHz)

< 4.4 dB + (0.0025 * freq in MHz)

500 MHz to < 2.3 GHz

< 7.4 dB + (0.00135 * freq in MHz)

< 5.9 dB + (0.00135 * freq in MHz)

2.3 GHz to 3.0 GHz

4.9 dB + (0.0015 * freq in MHz)

< 2.9 dB + (0.0015 * freq in MHz)

> 3.0 GHz to 13.2 GHz

< 12.0 dB

< 10.5 dB

> 13.2 GHz to 26.5 GHz

< 16.0 dB

< 12.5 dB