18 Installation Guide
E444xAU Options H20, H25 and H70 E444xAU IF Output Options
Nominal Characteristics
Nominal Characteristics
Review the following table for the nominal characteristics of the 321.4 MHz and Option IF
Output of the E444xAU with the new Option IF Output installed.
While performing the “Align All” routine on the PSA, the Option IF Output will be
corrupted due to the systems variable gain circuit stepping through the alignment routine.
The ripple correction in the flatness routine will be non-existent in the Option IF Output
since the Option IF Output is ported to the rear panel before the IF signal is digitized and
used for the flatness correction routine.
NOTE The 321.4 MHz IF Output is only effected if the Option IF Out is installed
without Option H7L or HNQ.
Table 4 Nominal Characteristics for the 321.4 and Option IF Output
Parameter 321.4 MHz IF Output Option IF Output
Frequency 321.4 MHz 20, 25, or 70 MHz
Conversion Loss
1
1.
Attenuator setting: 0 dB. In high band, the Preselector Center routine must be performed to achieve
the conversion loss listed in
Table 4. If applicable, when Option 1DS (100 kHz to 3 GHz Preamp) is
on there will be a 28 to 30 dB of gain in the Option IF Output at the rear panel of the PSA. With the
Preamp ON the conversion loss outlined in
Table 4 will be +22 dB.
−2 dB (± 2 dB) −6 dB (± 2 dB)
IF Bandwidth
Low Band
< 3 GHz
40 MHz 40 MHz
High Band
≥ 3 GHz
2
2.
Dependent on internal RF path. Typically, 40 MHz bandwidth increases as a function of center
frequency up to approximately 60 MHz with a center frequency of 26 GHz.
30 to 60 MHz 30 to 60 MHz
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