Specifications
PERFORMANCE
TESTS
2 m Low Frequency Test
87. Move the cursor to the
LEVEL field, and set the test signal level to 0.5
V.
88. Press the CATALOG SYSTEM MENU key and 'CABLE CORREC' softkey to dis-
play the CABLE CORRECTION page.
89. Move the cursor to the
CABLE CORRECTION MENU field.
90. Press the 2 and ENTER keys to start the 2 m Cable Correction.
91. Perform the 2 m
Cable Correction according to the instructions displayed on the
HP
4285A's LCD.
92. Press the MEAS SETUP MENU key and the 'CORRECTION' softkey to display the
CORRECTION page.
93. Move the cursor to the
CABLE field, and press the '2 m' softkey to set the cable
length to 2 m.
94.
Connect the 2 m Test Leads
(HP
16048D) to the UNKNOWN terminals.
95. Store the
OPEN CORRECTION data and the SHORT CORRECTION data, refer to
steps 33 to 38.
In this procedure the OPEN termination and the SHORT termina-
tion must be connected to the 2 m Test Leads
(HP
16048D) with 4 BNC(f)-BNC(f)
adapters.
96. Press the
'DISPLAY FORMAT MENU' key to display the MEAS DISPLAY page.
97.
Connect the 100 pF Standard to the 2 m Test Leads.
98. Move the cursor
to
the LEVEL field, and set the test signal level to 1
V.
99. Move the cursor
to
the FREQ field, and set the test frequency to 1 MHz.
100. Press the TRIGGER key, and confirm that the
HP
4285A's reading
is
within the
specified test limits listed in Table 1-11.
101. Perform the test for all standards and settings listed in Table 1-11, by repeating
steps
97
to 100
for
each listed setting and standard.
Table 1-11. Impedance Measurement Accuracy Test Limits
(2
m
Low
Frequency Test)
Signal
Test Limits (Cp,D)
Level
100 pF
1000 pF
1
V Cp
C.V.±0.22
pF
C.V.±2.1
pF
D
±0.0022
±0.0021
2 V Cp
C.V.±0.28
pF
C.V.±2.5 pF
D
±0.0028
±0.0025
Test Frequency: 1 MHz
C.V.: Calibration Value at 1 MHz
1-22