Keysight Technologies InfiniVision 6000L Series, Service Manual

Page: 27 / 100

Testing Performance
2
6000L Series Oscilloscopes Service Guide 27
4 Use a BNC-banana cable to connect the multimeter to the other side of the
BNC Tee.
5 Connect the BNC Tee to the Channel 1 output of the calibrator as shown in
Figure 2 .
6 On the oscilloscope, press the
D15 Thru D0
key, then press the
Thresholds
softkey, then press the
D15 Thru D0
softkey repeatedly until the check mark is
next to
User
.
7 Press the oscilloscope
User
softkey, then turn the Entry knob ( ) on the front
panel on the oscilloscope to set the threshold test settings as shown in Table 5 .
8 Do the following steps for each of the threshold voltage levels shown in Table 5 .
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 page 46 ).
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
Table 5 Threshold Accuracy Voltage Test Settings
Threshold voltage setting
(in oscilloscope User softkey)
DC offset voltage setting
(on oscilloscope calibrator) Limits
+5.00 V +5.250 V ±1 mV dc Lower limit = +4.750 V
Upper limit = +5.250 V
–5.00 V –4.750 V ±1 mV dc Lower limit = –5.250 V
Upper limit = –4.750 V
0.00 V +100m V ±1 mV dc Upper limit = +100 mV
Lower limit = –100 mV