Test Procedures R&S SMB
1407.0806.82 1.44 E-5
Pulse Modulation
ON/OFF Ratio
Test equipment - Spectrum analyzer (Table 1-1, item 18)
- Pulse generator (Table 1-1, item 13)
Test setup
To determine the ON/OFF ratio, connect the spectrum analyzer to
the RF output socket of the DUT and let the PULSE EXT input
open.
Measurement
Setting on DUT:
RF On
Level 0 dBm
Frequency recommended test frequencies
Pulse Modulation menu:
Source External
State On
Polarity Inverse
Setting on Analyzer
FREQ/CENTER test frequency
SPAN 0 Hz
AMPT/REF LEVEL 0 dBm
BW RES BW MANUAL 3 kHz
SWEEP SWEEP TIME MANUAL 100 ms
MEAS TIME DOM POWER on
Determine the output level of the DUT at the recommended test
frequencies with
Pulse Modulation Polarity Inverse
and
Pulse Modulation Polarity Normal.
The level difference between the output level with Polarity Inverse
and Polarity Normal is the ON/OFF ratio.
Recommended test frequencies 5 MHz, 150 MHz, 400 MHz, 1.1 GHz, 2.2 GHz, 3.2 GHz.,
4 GHz, 5 GHz, 6 GHz
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