1. The N8974A and N8975A models have a mechanical switch fitted. This switch allows the analyzers to change between the 10 MHz to 3.0 GHz

and the 3.0 GHz to 6.7 GHz frequency range on the N8974A. On the N8975A, the switch allows the change between the 10 MHz to 3.0 GHz and the 3.0 GHz to

26.5 GHz frequency range. If the current measurement frequency range crosses the 3.0 GHz point, the switch will operate. The mechanical switch has a limited

number of cycles over which it is reliable. To maximize the reliable life of the switch, switching over the 3.0 GHz frequency point should be kept to a minimum.

2. Temperature stability on the standard frequency reference is achieved 60 minutes after the analyzer is turned on.

3. Option 1D5 recommended for applications requiring high frequency stability.

5. Tuning accuracy is dependent on measurement bandwidth.

Specifications

Specifications are only valid for the stated operating frequency, and apply over

0° C to +55° C unless otherwise noted. The analyzer will meet its specifications

after 2 hours of storage within the operating temperature range, 60 minutes after

the analyzer is turned on, with Alignment running. A user calibration is required

before corrected measurements can be made.

Frequency

N8973A

10 MHz to 3.0 GHz

N8974A

10 MHz to 6.7 GHz

N8975A

10 MHz to 26.5 GHz

Measurement bandwidth (nominal)

N8973A, N8974A, N8975A

4 MHz, 2 MHz, 1 MHz, 400 kHz, 200 kHz, 100 kHz

Frequency reference

Aging

± < 0.1 ppm/year

Temperature stability

± < 6 ppm

± < 0.01 ppm

Settability

± < 0.5 ppm

± < 0.01 ppm

4 MHz measurement bandwidth (default on all models of noise figure analyzer)

Frequency

Error

10 MHz – 3.0 GHz

± < reference error + 100 kHz

3.0 GHz – 26.5 GHz

± < reference error + 400 kHz

< 4 MHz- measurement bandwidth (functionality not present in N8972A)

Frequency

Error

10 MHz – 3.0 GHz

< ± reference error + 20 kHz

3.0 GHz – 26.5 GHz

< ± reference error + 20% of measurement bandwidth

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