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
71
R ANGER -X5 R ADAR S YSTEM
T
ROUBLESHOOTING
,
M
AINTENANCE
,
AND
C
ALIBRATION
EEC
®
|
C
OMPANY
P
ROPRIETARY
5. System Level Calibrations
The following procedure will be used to verify that the frequency determining components of the
transmitter and receiver have been verified to be operational over the frequency range specified
in the requirements document.
1. Visually inspect the horizontal and vertical channel transmitter amplifier units.
2. Log the Serial number and test data results from the datasheet provided in the table
below.
3. Attach the data sheets to the test procedure.
5.1.1. Peak Power / Pulse Width and PRF Range Measurement
1. Verify the Transmitter Type used is a Solid State.
2. Apply power to the radar system. Verify or select the following settings.
• Point of Control – REMOTE
• Transmitter Power – On
• Radiate Power - Off
4. Select the 2 µs pulsewidth mode of operation.
5. Prior to conducting any power measurements, calibrate the power meter to be used, as
per the manufacturer’s instructions. Always be aware of the maximum power handling
capabilities of your particular sensor and take precautions to protect the test equipment.
6. Complete the following worksheet (Table 5) to determine whether additional attenuation
will be necessary when performing the Peak Power measurements.
7. If the sensor type in Column (A) of Table 5 is “Average,” then calculate the Duty Cycle
Correction Factor using the following formula and enter the value in Column E of Table 5
otherwise enter a zero (0) in column E and proceed to step 8.
(
A )
Sensor Type
(Peak or
Average)
( B )
Sensor
Maximum Input
Capacity
( C )
Peak Power
Specification for
System Under
Test in dB
( D )
Forward Port
Coupler
Attenuation in
dB
( E)
Duty Cycle
Correction
Factor.
(Average Power
Sensors Only)
( F ) Subtract
Columns D and
E from Column
C (F=C – (D+E)
Table 5 Power Sensor Worksheet
Some commonly used sensors and specifications are in the following table.
Sensor Manufacturer Part Number and Type
Maximum Input
Level Capacity
Gigatronics 80351A (Peak and CW)
+ 43 dBm Peak/ +37 dBm CW
HP/Agilent 84811A (Peak)
+ 20 dBm Peak
HP/Agilent 8481A (Peak)
+ 20 dBm Peak
HP/Agilent 8484A (Average)
+ 20 dBm Average
HP/Agilent 478A (Average)
+ 10 dBm Average
Table 6 Typical power Sensor Specifications
8. Subtract Columns D and E from Column C and enter the result in Column F.
9. If the result recorded in column F is less than the value recorded in column B then your
sensor selection does not require any additional attenuation and you may continue to step
10. If the value recorded in column F is greater than the value recorded in column B then an