User's Manual Part 2

T ECHNICAL D OCUMENTATION P ROTECTING P EOPLE AND A SSETS
®
D ATE : 22 M ARCH 2017 | V ERSION : 1.4
85
R ANGER -X5 R ADAR S YSTEM
T
ROUBLESHOOTING
,
M
AINTENANCE
,
AND
C
ALIBRATION
EEC
®
|
C
OMPANY
P
ROPRIETARY
Figure 23. Typical Calibration Test Results Screenshot (LDR > 100dB)
5.4.3. Minimum Discernable Signal (MDS) Measurement and Verification Test
Test Preparation
1. Use an external signal generator to insert a signal into the receiver before the LNA.
2. Put the external signal generator in pulse mode synchronizing to the radar trigger.
3. Configure the external signal generator so that it produces a 10 km wide pulse (65 µs)
centered at 15 km (trigger delay of approximately 100 µs).
4. Open A-Scope display modes. Select unfiltered intensity, no clutter-filtering mode.
5. From Edge surveillance select range normalization ON and 30 km range. Set Gate Width
to 15.625 meters and the sample size to 32 pulses.
6. Be sure to take a new noise sample with no signal injected after selecting the pulsewidth
to be verified.
7. Inject the following signal levels shown in the Signal Strength column for each pulse width.
Verify for both the Horizontal and Vertical Receiver channels.
Pulse Width
Signal Strength
Pulse Discernible
Horizontal
Pulse Discernible Vertical
PW0 (2.0µs)
-
113
dBm
Pass

Fail

Pass

Fail

5.4.4. Clutter Filter and Clutter Rejection Verification Test
The following test will verify a ground clutter suppression capability of the system to be 40 dB or
greater. TX Correction must be enabled prior to running the clutter suppression test.
Clutter Filter Suppression Verification Procedure:
This will show that the IQ2 is capable of rejecting clutter signals in filters 1 through 15. The CSS
of the IQ2 will be evaluated using a stable signal source such as the Agilent 33250A or equivalent