Agilent Technologies 4395A, Service Manual

Page: 55 / 343

7. RECEIVER NOISE LEVEL TEST (NA)
Description
This test measures the 4395A receiv er noise lev els (noise o or) in the net w ork analyzer mo de
at IF BW 10 Hz. This measures the noise lev el using the marker statistics function (mean)
when the inputs are terminated.
In this test, the noise lev el (trace mean v alue) is measured in linear format [Unit]. Then the
measured v alues are con v erted to log magnitude format [dBm]. This is done to a v oid sk ewing
the data with the marker statistics function.
Specification
Noise lev el
Noise Lev el
F requency @IFBW=10 Hz
100 freq. < 100 kHz <085 dBm
100 kHz freq. <[ 0115 + f
1
/100 ] dBm
1: f is measurement frequency (MHz).
T est Equipment
50 T ermination (three required) : : : : : : : : : : : : : : : : : : : : : : : : 909C Opt. 012 or part of 85032B
Procedure
1. Connect the test equipmen t as sho wn in Figure 2-9.
Figure 2-9. Receiv er Noise Lev el T est Setup
P erformance T ests 2-21