Technical data

Service Guide 85309-90082
Printing Copies of Documentation from the
Web
To print copies of documentation from the Web, download the PDF file
from the Keysight web site:
•Go to http://www.keysight.com.
• Enter the product model number (Ex: 85309B) in the Search function.
•Click Search.
•Click the Manuals hyperlink.
• Click the hyperlink title for the document you want to print - this
downloads the PDF
• Print the document after the PDF has fully downloaded.
Definitions
• Specifications describe the performance of parameters covered by the
product warranty (temperature –0 to 50
C, unless otherwise noted.)
• Ty p i c a l describes additional product performance information that is
not covered by the product warranty. It is performance beyond
specification that 80% of the units exhibit with a 95% confidence level
over the temperature range 20 to 30
C. Typical performance does not
include measurement uncertainty.
• Nominal values indicate expected performance or describe product
performance that is useful in the application of the product, but is not
covered by the product warranty.
• Characteristic Performance describes performance parameter that the
product is expected to meet before it leaves the factory, but is not
verified in the field and is not covered by the product warranty. A
characteristic includes the same guard bands as a specification.
85309B Overview
The 85309B LO/IF Distribution Unit is a broadband, distributed frequency
converter that utilizes fundamental mixing to provide the performance for
antenna test systems. The 85309B, together with mixers in the antenna
test configuration (not supplied), down convert a microwave signal to an IF
signal. This IF signal is input directly to the PNA digitizer (via either front
panel jumpers or a rear panel connector), bypassing the PNA’s RF
conversion stage, for increased measurement sensitivity.
The 85309B LO/IF Distribution Unit contains LO signal amplifiers, which