Performance Tests
4-44
TDS 420A, TDS 430A & TDS 460A Service Manual
b. Set the Main and Delayed Horizontal Scales:
H Set the horizontal SCALE to5nsfortheM (Main) time base.
H Press the side-menu button Delayed Only.
H Set the horizontal SCALE to2nsfortheD (Delayed) time base.
Press the side-menu button Main Only.
c. Display the test signal:
H Set the generator frequency to 350 MHz (TDS 420A) or 500 MHz
(TDS 430A and TDS 460A).
H Set the test signal amplitude for about five divisions on screen. Now
fine adjust the generator output until the CH 1 Amplitude readout
indicates the amplitude is 500 mV. (Readout may fluctuate around
500 mV.)
H Disconnect the sine wave at CH 1 and reconnect it to CH 1 through
a 5X attenuator.
d. Repeat step 2, substeps b and c only.
4. Confirm that the Main and Delayed trigger systems couple trigger signals
from all channels: Doing the procedure Check Analog Bandwidth, which
begins on page 4--25, checks coupling. If you have not done that procedure,
do so after finishing this procedure. See the following note.
NOTE. Steps 1 through 3 confirmed trigger sensitivity for the Main and Delayed
triggering systems using the CH 1 input. Doing the procedure Check Analog
Bandwidth ensures that trigger signals are coupled from all channels.
5. Disconnect the hookup: Disconnect the cable from the generator output at
the input connector of the channel last tested.
Equipment
Required
One sine wave generator (Item 11)
Two precision 50 Ω coaxial cables (Item 5)
One BNC T connector (Item 8)
Prerequisites See page 4--15.
1. Install the test hookup and preset the oscilloscope controls:
a. Initialize the oscilloscope:
H Press save/recall SETUP.
Maximum Input
Frequency, Auxiliary
Trigger
To Next Page
Loading...
