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11-6 HIGH LEVEL NOISE
TEST
The following test verifies that the high-level signal noise in the VNA
will not significantly affect the accuracy of subsequent measurements.
Calibration of the system is not required for this test.
This test requires that you press specified front panel keys and make
choices from the displayed menu(s). The keys used in this test are
highlighted below.
Setup the VNA as described in the table at the left.
HIGH LEVEL NOISE TEST OPERATIONAL CHECKOUT
11-6 37xxxE OM
Key Menu Choice
Setup
Menu
START: 40 MHz
STOP: High-end frequency
Channel
Menu
DUAL CHANNELS 1-3
Graph
Type
LOG MAGNITUDE
(Both channels)
Set
Scale
RESOLUTION:
0.020 dB/DIV
REF VALUE:
0.0 dB
(Both channels)
S-Params Channel1–S
12
Channel3–S
21
Data
Points
201
Video
IF BW
NORMAL (1 kHz)
Limits UPPER LIMIT ON
0.015 if less than 40 GHz
0.04 if 40 GHz
0.14 if above 40 GHz
LOWER LIMIT ON
-0.015 if less than 40 GHz
-0.04 if 40 GHz
-0.14 if above 40 GHz
DISPLAY LIMITS ON
.
-
Measurement
Enhancement
Channels
Display
Graph
Type
Set
Scale
Auto
Scale
S
Params
Ref
Plane
Trace
Memory
Channel
Menu
Ch 1
Ch 2
Ch 3
Ch 4
Option
Menu
Video
IF BW
Avg/
Smooth
Menu
Trace
Smooth
Average
Setup
Menu
Data
Points
Hold
Domain
Appl
Measurement
Enhancement
Channels
Display
Channel Menu
Setup Menu
Data Points
Graph Type
Set Scale
Video IF BW
Average
Avg/Smooth Menu
S Params