Tektronix 371B Service Manual page 201

D18. Checking Ripple
Pulse Noise of Current
Source Mode
371B Service Manual
Specifications:
H Ripple plus noise is within 1 % of step amplitude + 10 nA.
NOTE. The characteristics examined in this procedure are examples of typical
instrument operation; they are not specifications.
Equipment Setup. Set up the equipment as shown in the following illustration and
set controls as described.
371B Settings:
Initialize the 371B, then set the following control as indicated.
COLLECTOR SUPPLY
PEAK POWER WATTS
STEP GENERATOR
NUMBER OF STEPS
STEP/OFFSET AMPLITUDE
Test Equipment Settings:
TEST OSCILLOSCOPE
COUPLING
VERTICAL
HORIZONTAL
TRIGGERING
1. Connect a patch cord between the COMMON and one of the 1 kW terminals.
2. Connect a patch cord between the STEP GENERATOR CURRENT and the
other 1 kW terminal.
3. Connect the X1 probe tip from the test oscilloscope by using terminal plugs
as shown in Figure 5–25.
371B
30 W
0
1 mA
AC
5 mV/DIV
10 ms/DIV
LINE
Performance Verification
5-99