2.3 Oscilloscope Setup
To set up the oscilloscope, perform the following steps:
1. Set the scope to Trigger on CH1 and adjust the trigger level to approximately 2 V.
2. Set CH1 to 2 V per division and CH2 to 5 V per division
3. Adjust the seconds/division setting to 500 ns/division
4. Connect the scope channel 1 probe to VIA (TP5). Ground the probe to GNDI (TP6)
5. Connect Channel 2 probe to VOA (J5 Pin 4 or TP11). Ground the probe to GNDA (J5 Pin 3 or TP12)
6. Adjust the vertical position of each channel to properly view each channel as shown in the figure below
A 500 kHz square wave should display on Channel 1 of the scope for the input and a 15 V version should display on Channel 2, as
shown in the following figure.
Figure 2.1. 500 kHz Square Wave
2.4 Repeat for Second Channel
1. Disable the function generator output.
2. Turn OFF the 15 V supply.
3. Disconnect 15 V supply from VDDA/GNDA.
4. Connect the 15 V supply to VDDB (J6 or TP20) and GNDB (J7 or TP21).
5. Move the Channel 2 scope probe to VOB (J5 pin 2 or TP17) and GNDB (J5 pin 1 or TP18).
6. Remove the shunt on JP3.
7. Move the function generator to VIB (TP9) and GNDI (TP10).
8. Place shunt on JP1 between Pins 2 and 3 (connects VIA to GNDI).
9. Turn ON the dc supply.
10. Ensure that LED D6 turns on.
11. Ensure that the current draw is less than 100 mA. If it is larger, this indicates that either the board or Si823Hx has been damaged
or the supply is connected backwards.
12. Enable the function generator output.
13. The scope display should show both the input and output waveforms as before.
UG367: Si823Hx/8252x-EVB User's Guide • Required Equipment
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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Rev. 0.3 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • August 8, 2022
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