HP 4262A User Manual

Section IV
Paragraph 4-15
PERFORMANCE TESTS
Model 4262A
4-22
4-16. COMPARATOR TEST (OPTION 004 ONLY).
DESCRIPTION:
This test verifies that the built-in 5 digit digital comparator makes the correct com-
parison between the digits set into the thumbwheel switch and the displayed counts.
Comparison output data at COMPARATOR OUTPUT connector (rear panel) is also
checked by this test.
16061A
DUT 80X
Figure 4-8. Comparator Test Setup.
EQUIPMENT:
DUTBox................ HP 16361A (100pF)
TestLeads............... HP P/N 16361-61605
PROCEDURE:
1. Connect Test Leads (HP P/N 16361-61605) between 4262A UNKNOWN termi-
nals and 16361A DUT Box as shown in Figure 4-8. If DUT Box is not available,
attach 16061A Test Fixture to 4262A UNKNOWN terminals and use a 100pF
capacitor as a DUT,
2. Set 4262A controls as follows:
DCBIAS.. ..., OFF
CIRCUITMODE. .................... AUTO
FUNCTION. .. .......... . iiiiiiiinnun, C
TESTSIGNAL . ...................... 1kHz
LCRRANGE ....................... AUTO
TRIGGER. ........................... INT
3. Set 16361A LCR RANGE to 100pF.
4. Push COMPARATOR ENABLE button (simultaneously, the LCR RANGE and
DQ RANGE will be automatically changed to MANUAL).
5. Set LCR HIGH LIMIT switch to “1000” and LOW LIMIT switch to “0950”.
6.
Verify
HIGH
and
LOW
LIMIT
settings
by
pushing
and
holding
upper
LIMIT
CHECK pushbutton.
7. Adjust ZERO ADJ C control for a display reading of ““949”’ (or less) counts.

HP 4262A Specifications

General

Brand	HP
Model	4262A
Category	Measuring Instruments
Language	English