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General Information
Introduction
Introduction
The Agilent Models 11970K, 11970A, 11970Q, 11970U, 11970V and 11970W are general-purpose
harmonic mixers with very flat frequency response characteristics and low conversion loss. Collectively,
they cover the frequency range of 18 to 110 GHz. The 11970K covers the 18 - 26. 5 GHz range; the
11970A, the 26.5 - 40 GHz range; the 11970Q, the 33 - 50 GHz range; the 11970U, the 40 - 60 GHz
range; the 11970V, the 50 - 75 GHz range; and the 11970W, the 75 - 110 GHz range.
The overall local oscillator (LO) frequency range of the 11970 Series Mixers is 3.0 to 6.1 GHz. Each of
the mixers employs a different LO harmonic, and as a result has a different optimum LO range within the
overall LO range of the series.
An 8 1/2 by 11 inch conversion losss table and chart is included with each mixer shippment. There is also
electronic media included that is used to download the conversion loss data into a few of the Spectrum
Analyzers documented in this user's guide. This conversion loss data table must be employed for
absolute amplitude measurements. Also supplied with each mixer are five screws (four required) for
attaching the mixer RF input flange to the waveguide.
Equipment Supplied
Waveguide Connector Screws
Five hex-head screws are supplied with each mixer. Four are required to make the mixer-to-waveguide
connection, one is a spare. Use ONLY the screws supplied to attach the mixer to the waveguide. Because
of slight differences in the way the mixers couple with the waveguide, the square-flange mixers (11970K
and 11970A) and the round-flange mixer (11970Q, 11970U, 11970V and 11970W) require different
screws.
If your mixer has a square waveguide flange, use four hex-head screws with Part Number 3030-0221. If
it has a round waveguide flange, use four hex-head captive screws with Part Number 1390-0671. The
special balldriver hex screwdriver available in the Option 009 Mixer Connector Kit simplifies
installation of the waveguide connector screws.
See
NOTE
Mixers Covered by Manual
Serial Numbers
Attached to your mixer is a label, which shows both the mixer model number and its serial number (two
parts). The first four digits and the letter of the serial number are the serial number prefix; the last five
digits are the suffix. The contents of this manual apply to mixers with the serial number prefixes listed
under "Serial Number Prefixes" on the title page of this manual.
10
Chapter 3 , "Service."
for a list of replacement parts.
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