Agilent Technologies 11970-90031 manual Getting Started, Mixer Connections

Operation

Getting Started

Getting Started

The 11970 series of millimeter wave mixers have no bias or back-short adjustments. 11970 Mixers require an LO power of 14 to 18 dBm at the LO input. If the spectrum analyzer used with the 11970 does not have sufficient LO power, an 11975A Amplifier or an equivalent is required to increase this power.

CAUTION Before connecting the 11975A Amplifier, set its rear panel ALC switch to ON. Failure to do this can damage the mixer.

Mixer Connections

With the three SMA cables (Part Number 5061-5458, each) provided in the Option 009 Mixer Connection Kit, connect the 11970 Mixer, the spectrum analyzer, and the 11975A Amplifier. An example connection for an 8566B Spectrum Analyzer is shown in Figure 2-1.

NOTE	The example below shows an 8566B analyzer, other spectrum analyzers do
	not require the amplifier and third SMA cable.

Figure 2-1. 11970 Mixer Connections

Operation

Leave the waveguide flange cap on whenever the mixer is not connected to a device under test. This protects the flange mating surface from scratches, which can degrade the mixer’s performance. Use an appropriate waveguide attenuator if the output power of the unit under test exceeds the RF Input Power indicated in the specifications.

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