Chapter 2 113
Front-Panel Key Reference
Input/Output
Input/Output
Input Z Corr
50Ω 75Ω
Sets the input impedance for voltage-to-power conversions. The
impedance you select is for computational purposes only, since the
actual impedance is set by internal hardware to 50 Ω. Setting the
computational input impedance to 75 Ω is useful when using a 75 Ω to
50 Ω adapter to measure a 75 Ω device on an analyzer having a 50 Ω
input impedance.
Key Access:
Input/Output
Coupling
AC DC
Only available in Agilent models E7402A or E7405A with Option UKB,
and E7403A or E7404A. Specifies alternating current (ac) or direct
current (dc) coupling at the analyzer input. Selecting ac coupling blocks
any dc voltage at the analyzer input, but also decreases the frequency
range of the analyzer. Input coupling is set to ac by an instrument
preset (With
Preset Type set to Factory). Some amplitude specifications
apply only when coupling is set to dc. Refer to the appropriate
amplitude specifications and characteristics for your analyzer.
NOTE AC is always coupled in Agilent EMC models E7401A and E7402A
(without Option UKB).
DC is always coupled in Agilent EMC model E7405A (without Option
UKB).
Table 2-2 Selecting Input Coupling
ESA Model # AC
Frequency Range
DC
Frequency Range
E7402A with
Option UKB
100 kHz to 3 GHz 100 Hz to 3 GHz
E7403A 100 kHz to 6.7 GHz 9 kHz to 6.7 GHz
E7403A with
Option UKB
100 kHz to 6.7 GHz 100 Hz to 6.7 GHz
E7404A 100 kHz to 13.2 GHz 9 kHz to 13.2 GHz
E7404A with
Option UKB
100 kHz to 13.2 GHz 100 Hz to 13.2 GHz
E7405A with
Option UKB
10 MHz to 26.5 GHz 100 Hz to 26.5 GHz
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