THM500 Series Performance Verification
22
Bench Test Instruments and Handheld Oscilloscopes Basic Service
THM5xx
CH 2
COM
CH 1
50
W
termination
50
W
cable
Patch cord
Leveled Sine
Wave
generator
BNC to dual banana cable
Figure 10: Crosstalk between scope channels test setup
3.
On the THM500 series instrument, press the
POSITION/SCALE
button
until the readout shows
SCALE
in the lower-right corner. Use the
Y
and
B
buttons to set the CH 1 vertical scale to
500 mV/div
and the
A
and
"
buttons to set the time base to
200
m
s/div
.
4.
Use the THM500 series instrument menus to set the sampling mode to
SPIKE DETECT
; then remove the menus from the display.
5.
Adjust the leveled sine wave generator to display five divisions peak-to-peak
at
5 MHz
.
NOTE
. The 5 MHz waveform is aliased and appears untriggered.
6.
Press the THM500 series instrument
WAVEFORM ON/OFF
button to turn
the CH 1 waveform display off.
7.
Press the THM500 series instrument
SELECT
button to select
CH 2
. Press
the
WAVEFORM ON/OFF
button to turn on channel 2. Press the
POSI-
TION/SCALE
button to show
SCALE
; then use the
Y
and
B
buttons to set
the vertical scale to
50 mV/div
.
8.
Verify that the peak-to-peak signal displayed on the THM500 series
instrument channel 2 is less than 0.5
divisions (25 mV
p-p
).
9.
Disconnect the test setup.
