7-7
7.3 Performance Test
7.3.3 Burst Width Measurement
(1) Test specifications
• Pulse width 100 ns to 100 ms ................ Burst width Narrow
........................................... Manual frequency 1 GHz or more
1 µs to 100 ms ................... Burst width Wide
• Input sensitivity –33 dBm : .......................... <12.4 GHz
–28 dBm : .......................... <20 GHz
–25 dBm : .......................... <26.5 GHz
{0.741 × f (GHz)–44.6} dBm : ≤40 GHz
• Measurement accuracy
± 20 ns ± time base accuracy × measurement pulse width ± trigger error
(2) Test equipment
• Signal generator capable of pulse modulation or a signal generator and pulse modulator
• Power meter
• Power sensor
(3) Test procedure
1) Set the unit to preset values and then make the following settings :
Pulse width : Narrow
Burst mode : Width
Measurement resolution : 1 MHz
Frequency acquisition mode : Manual
Manual frequency : Output frequency of signal generator
2) Set the pulse modulation width to 100 ns and continuous period to pulse modulation width + 1 µs.
3) Connect the Reference Output terminal on the back of the unit to the external standard input on the signal genera-
tor.
4) Set signal generator output to continuous wave (pulse modulation Off), and then use a measurement cable to
connect the signal generator output connector to the power meter input connector.
5) Adjust the signal generator output level to the rated sensitivity of the power meter.
6) Disconnect the measurement cable you connected to the power meter input connector and connect it to the unit’s
Input1 connector.
7) Check that the output frequency of the signal generator is being displayed on the counter.
8) Turn pulse modulation On.
9) Set the unit’s Meas Mode to Burst.
10) Check that the burst width measurement value displays the pulse modulation width.
11) Disconnect the measurement cable you connected to the unit’s Input1 connector, change the output frequency of
the signal generator, repeat steps 4) to 10), and check that the burst width measurement value is properly dis-
played.
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