Table 5 Threshold Accuracy Voltage Test Settings - Agilent Technologies InfiniiVision 7000 Series Service Manual

2 Testing Performance
32
oscilloscope to set the threshold test settings as shown in
Table 5.
Threshold Accuracy Voltage Test Settings
Table 5
Threshold voltage
setting
(in oscilloscope User
softkey)
+5.00 V
–5.00 V
0.00 V
8 Do the following steps for each of the threshold voltage
levels shown in Table
a Set the threshold voltage shown in the User softkey
using the Entry knob on the oscilloscope.
b Enter the corresponding DC offset voltage on the
oscilloscope calibrator front panel. Then use the
multimeter to verify the voltage.
Digital channel activity indicators are displayed on the
status line at the top of the oscilloscope display. The
activity indicators for D7- D0 should show all of the
channels at digital high levels.
c Use the knob on the oscilloscope calibrator to decrease
the offset voltage, in increments of 10 mV, until the
activity indicators for digital channels D7- D0 are all at
digital low levels. Record the oscilloscope calibrator
voltage in the Performance Test Record (see
d Use the knob on the oscilloscope calibrator to increase
the offset voltage, in increments of 10 mV, until the
activity indicators for digital channels D7- D0 are all at
digital high levels. Record the oscilloscope calibrator
voltage in the Performance Test Record (see
DC offset voltage setting
(on oscilloscope
calibrator)
+5.250 V ±1 mV dc
–4.750 V ±1 mV dc
+100m V ±1 mV dc
5.
7000 Series Oscilloscopes Service Guide
Limits
Lower limit = +4.750 V
Upper limit = +5.250 V
Lower limit = –5.250 V
Upper limit = –4.750 V
Upper limit = +100 mV
Lower limit = –100 mV
page 57).
page 57).