Performance Verification
3.5 Input A and Input B Tests 3
3-7
1. Short circuit the Input A and the Input B shielded banana sockets of the test tool. Use the
BB120 banana to BNC adapter, and a 50Ω (or lower) BNC termination.
2. Select the following test tool setup:
• Turn Input B on (if not already on).
• Press
to select auto ranging (AUTO in top of display).
(
toggles between AUTO and MANUAL ranging).
• Fluke 123/124: press
/ to open the SCOPE INPUTS menu.
• Fluke 123/124: press
to open the SCOPE OPTIONS menu, and choose :
SCOPE MODE: NORMAL | WAVEFORM MODE: SMOOTH
• Fluke 125: press to open MENU.
• Fluke 125: press
to open the TRIGGER menu, and choose :
UPDATE: FREE RUN
• Fluke 125: press
to open the SMOOTH menu, and choose :
WAVEFORM: SMOOTH
• Press to leave the menus.
3. Using
toggle the time base between 10 ms/div and 5 ms/div.
(the time base ranging is set to manual now, the input sensitivity is still automatic; no
indication
AUTO or MANUAL is displayed).
After changing the time base wait some seconds until the trace has settled.
Observe the Input A trace, and check to see if it returns to the same position after
changing the time base. The allowed difference is ±0.04 division (= 1 pixel).
Observe the Input B trace for the same conditions.
4. Using
toggle the time base between 1 μs/div and 500 ns/div. After changing the
time base wait some seconds until the trace has settled.
Observe the Input A trace, and check to see if it is set to the same position after changing
the time base. The allowed difference is ±0.04 division (= 1 pixel).
Observe the Input B trace for the same conditions.
5. Using
set the time base to 10 ms/div.
6. Using
toggle the sensitivity of Input A between 5 and 10 mV/div. After
changing the sensitivity wait some seconds until the trace has settled.
Observe the Input A trace, and check to see if it is set to the same position after changing
the sensitivity. The allowed difference is ±0.04 division (= 1 pixel).
7. Using
toggle the sensitivity of Input B between 5 and 10 mV/div. After
changing the sensitivity wait some seconds until the trace has settled.
To Next Page
Loading...
