Receiver Performance Verification; First Section; Second Section - HP 85325A Operating And Service Manual

R/q/u/v/w millimeter subsystem, millimeter-wave interface kit

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Table Of Contents

Table of Contents

First Section

RF to IF Conversion

IF Noise

Crosstalk

Compression

Second Section

Tracking Results

Sensitivity Results

Crosstalk Results

Receiver Performance Veriﬁcation

The receiver performance veriﬁcation checks the receiver section of the

antenna measurement system. The tests are divided into two sections.

The ﬁrst section tests the various parameters of the receiver system. The

results of these tests are used to calculate the speciﬁed parameters in the

section below. It is possible to have one of these tests fail but still be within

the speciﬁed parameters of the millimeter subsystem. These tests consist of:

Measures the power loss of the mixers when the RF signal is converted to

the IF signal. This is not a speciﬁed system performance parameter.

Measures sensitivity (the RMS noise level of the trace data when the test or

reference channels are terminated with a 50 ohm load). This is not a

speciﬁed system performance parameter.

Measures signal leakage between the antenna reference and the test

channels. This is a speciﬁed system performance parameter.

Measures input power at which the mixers exhibit 0.1 dB compression. This

is a speciﬁed system performance parameter.

The second section takes the results of the above section and calculates the

speciﬁed parameters of the millimeter subsystem. These tests consist of:

Calculates the conversion gain tracking between channels using RF to IF

conversion measurements from the ﬁrst section.This is not a speciﬁed

system performance parameter.

Calculates the actual sensitivity of the receiver in RMS power using IF

Noise and RF to IF Conversion measurements from the ﬁrst section.This is a

speciﬁed system performance parameter.

Calculates the actual crosstalk between all channels using Crosstalk and RF

to IF Conversion measurements from the ﬁrst section. This is a speciﬁed

system performance parameter.

System Performance Verification