138 Chapter2
Making Measurements
Example 11: Time-Gated Measurement
Instrument configurations for the measurement are:
Pulse Generator: Agilent 8112A or equivalent
Instrument Connections
Signal Generator: Agilent 8642A or equivalent
Instrument Connections
Spectrum Analyzer Settings
Instrument Connections
Pulse period 5 ms (or pulse frequency equal to 200 Hz)
Mode norm
Pulse width 4 ms
High level (HIL) 5 V
Waveform pulse
Low level (LOL) 0 V
Delay 0 or minimum
Amplitude 5 V
Offset 2.5 V
Frequency 40 MHz
Amplitude 0 dBm
AM OFF
PULSE ON, modulation source set to EXT DC
FM ON, 1 kHz deviation
FM MOD SOURCE INT
MOD
FREQUENCY
100 kHz
RF ON
Center frequency 40 MHz
Span 500 kHz
Reference level 0 dBm
Sweep time 3.1 s
Resolution
bandwidth
3 kHz
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