Check The Analog Board +5 V Accuracy ( + 2%); Accuracy (+ 2%); Check The Analog Board -5 V Accuracy; Accuracy ( + 5%) - Tektronix DC 5010 Anleitung

Calibration-DC 501 0
Adjustment Procedure
5. Check the Analog Board +5 V Accuracy ( t 2 % )
a. Remove the digital multimeter VoltslQ test lead from
the Vref test point and connect it to the +5 test point (Ana-
log board).
b. Check that the digital multimeter readout indicates be-
tween 4.90 and 5.1 50 (volts).
6. Check the Analog Board
+
12 V Accuracy
( k 2 % )
a. Remove the digital multimeter VoltslQ test lead from
the +5 test point and connect to the
+
12 test point (Analog
board).
b. Check that the digital multimeter readout indicates be-
tween 1 1.76 and 12.24 (volts).
7. Check the Analog Board
-
5 V Accuracy (+,5%)
a. Remove the digital multimeter VoltslQ test lead from
the
+
12 test point and connect it to the -5 test point (Ana-
log board).
b. Check that the digital multimeter readout indicates be-
tween -4.75 and -5.25 (volts).
c. Remove the test lead connections.
8. Adjust the Standard Timebase Accuracy,
C1521, Osc Adj
a. Connect a coaxial cable from the 1 MHz Frequency
Standard to the DC 501 0 CHANNEL A input.
b. Press the DC 501 0 AUTO TRIG button.
c. ADJUST-C1521 (through a hole in the back plate)
until the DC 501 0 readout indicates between 999.99990 and
1.0000005 MHz.
NOTE
This sets the DC 5010 oscillator within one part in
lo7. It will take approximately one second for the dis-
play to update.
9. Adjust the Optional Tirnebase Accuracy, Y 1530
-
NOTE
The Option 0 1 Timebase adjustment is made through
an access hole in the back of the oven timebase.
Y1530 is located on the back side of the Auxiliary
board.
a. Connect a coaxial cable from the 1 MHz Frequency
Standard to the DC 5010 CHANNEL A input.
b. Set the DC 5010 LEVEL CH A for a stable display
readout.
c. ADJUST-Y1530 until the DC 501 0 display readout
indicates 1.0000000 MHz.
d. Press to light the PERIOD A button.
e. ADJUST-Y1530 until the DC 5010 display readout
indicates between 999.99998 and 999.99999.
-
f. Remove the cable connections from the DC 5010.
10. Adjust R1205, A Off, and R1207, B Off
Refer to Fig. 8-3, adjustment setup, in the pullout pages.
Use the following control settings.
DC 5010
CHANNEL A and
CHANNEL B
TERM 1 MQ (unlighted)
SLOPE
+
(unlighted)
ATTEN X1 (lighted)
COUPL AC (unlighted)
FREQ A (lighted)
Digital Multimeter
Function-Range 2 V
Pulse Generator
Output low level (CW)
Output high level (CW)
Pulse Period Ext Duration
Pulse Duration Ext
a. Connect the interconnecting cable from the DC 5010
-
CH A SHAPED OUT to the digital multimeter input using an
rf connector-to-banana adapter.
REV JUL 1983