HP 8648 A/B/C/D - Changpuak.ch

Pulse Modulation
Rise Time
Performance Tkst
(Option lE6 Only)
Connect the Test
Equipment
Configure the Pulse
Generator
Configure the HP 8648
Configure the
Oscilloscope
Measure the Rise Time
Pulse Modulation Rise Time Performance Test (Option lE6 Only)
gssssssB E
8~088888 B
DIGITIZING
OSCILLOSCOPE
5”7 IbC
Figure 8-19. Pulse Modulation On/Off Risetime Equipment Setup.
1. Mode normal
2. Frequency 10 MHz
3. Duty cycle 50%
4. Amplitude 1 V
5. Offset 1 V
1. Turn the RF output on; press [RF).
2. Activate pulse modulation display; press (EGJ (AM).
3. Turn pulse modulation on; press [MOD ON/OFF].
4. Set the amplitude; press m @ @kGYj’J.
1. Channel 1 125 mV/div
2. Trigger source channel 4
3. Trigger level 1.5 V
4. Timebase 10 ns/div
1. Use the timebase delay to align a rising pulse edge with the center
of the oscilloscope screen.
2. Change the timebase to 2 ns/div.
3. Display the envelope of channel 1.
4. Set the frequency of the HP 8648 to that listed in the test record.
For this frequency measure the 10% to 90% rise time of the RF
pulse.
Performance Tests 6-27