Specifications

Chapter 1 1-7
Overview
Characteristics
Displayed Average Noise Level (Preamp Off)
Due to the additional length of RF cable, and insertion loss of the RF switch by the
inclusion of option H26, the standard instrument displayed average noise level (DANL)
(H26 Off) may be nominally degraded. Equation 1-1, “DANL degradation for E4440A,
E4443A, and E4445A H26”
and Equation 1-2, “DANL degradation for E4446A and E4448A
H26”
are provided in calculating the degradation for specific frequencies other than those
given in Table 1-2 on page 1-4.
“Appendix” on page 4-1 is provided to manually verify DANL performance.
Equation 1-1 DANL degradation for E4440A, E4443A, and E4445A H26
Equation 1-2 DANL degradation for E4446A and E4448A H26
For all equations, F is the Frequency in GHz.
D is the term used for representing the instrument’s DANL specification found in the PSA
Series Specification Guide.
DH26 is the term used to represent the resultant instrument DANL from the inclusion of
Option H26.
DH26 D 0.2 0.45 26.5⁄()F×()7.5
5.758 4.89 F 0.146 F
2
2.433
3–
×10 F
3
×+×–×+
1200
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⎝⎠
⎜⎟
⎛⎞
×++ +=
DH26 D 0.15 0.02 F×()7
8.473 6.86 F 0.159 F
2
1.831
3–
×10 F
3
×+×–×+
1200
--------------------------------------------------------------------------------------------------------------------------
⎝⎠
⎜⎟
⎛⎞
×++ +=