Technical data

Chapter 4: Specification & Performance Verification
4-26 2400 Series Operation Manual, 33237 Revision A, May 2004
4.4.3.4 Pulse Modulation Tests
4.4.3.4.1 Description
The following procedures test Pulse Modulation Level Accuracy, On/Off Ratio and Rise/Fall times at
frequencies within each band. The tests require an fast crystal detector (rise time < 10 nsec).
4.4.3.4.2 Equipment Required
• UUT
• Oscilloscope (300 MHz bandwidth recommended)
• Crystal Detector, < 10 nSec rise-time, frequency range equivalent to test frequency range.
• Spectrum Analyzer, 0 Hz span capable
• Giga-tronics 8650A Series
• Giga-tronics 80350A series sensor
• Pulse Generator
• RF cables
4.4.3.4.3 Rise and Fall Time Test Procedure
1. Connect the output of the pulse generator to the PM In BNC of the UUT
2. Set the pulse generator for the following:
Pulse Width 1 usec.
Pulse Interval 2 usec.
Output: 5 volts, 50 ohms
3. Connect the crystal detector to the output of the UUT and to the oscilloscope. Set the trigger of
the oscilloscope accordingly to the detector type (positive or negative)
4. Set the UUT to the following:
Power Level 0 dBm
External PM state ON
Trigger Polarity Positive
RF Output state ON
5. Set the UUT to the test frequency. Measure and record the rise and fall times.
6. Repeat the test for each test frequency.