Tektronix DC 5010 Anleitung Seite 260

Calibration-DC 50 10
Performance Check Procedure
DC 5010
PERIOD A (lighted)
CHANNEL A and
CHANNEL B
ATTEN X I (lighted)
TERM 50 Q (lighted)
k. CHECK-that the DC 501 0 readout stops changing
values and the display GATE light is not blinking (but may be
lighted).
a. Connect a coaxial cable from the pulse generator out-
put to the DC 5010 CHANNEL A input. Do not use the XI0
attenuator for this test.
6. Check Input Capacitance: 23 pF,
+
10%
b. Adjust the pulse generator Period Variable control un-
til the DC 501 0 display readout indicates about 200 (ns).
c. Adjust the high level on the pulse generator for 2.5 V.
d. With the pulse generator High Level control set, ad-
just the Low Level control to <.4 V.
e. Remove the DC 5010 CHANNEL A input connection
and connect the sinewave generator output to the CHAN-
NEL A input.
f. Set the DC 5010 to Freq A mode.
g. Adjust the sinewave generator Frequency Variable
control until the DC 501 0 display readout indicates approxi-
mately 75.OXXXX MHz (the last four digits can vary due to
source instability).
h. Press the DC 501 0 AUTO TRIG button, then connect
the pulse generator output to the ARM IN, using a "shaped
out" cable.
i. CHECK-that the DC 5010
proximately 75.OXXXX MHz (the
due to source instability) with
blinking.
display still indicates ap-
last four digits can vary
the display GATE light
j. Disconnect the cable that runs from the pulse genera-
tor to the counter arming input at the pulse generator end.
At that end of the cable, connect a 50 Q terminator (that will
pull the arming input down to a TTL low, and hence should
disable the counter).
Refer to Fig. 4-4, performance check
lowing control settings.
Frequency Hz
Multiplier
Function
Offset
Output
CHANNEL A and
CHANNEL 6
TERM
SLOPE
ATTEN
COUPL
FREQ A
FILTER (20 MHz)
Function Generator
setup. Use the fol-
(sine)
(midrange)
(cw)
1 MQ (unlighted)
+
(unlighted)
X I (lighted)
DC (unlighted)
(lighted)
(lighted)
a. Connect the 20 pF normalizer with a 50 Q terminator
and 5X attenuator from the DC 5010 CHANNEL A input
through a coaxial cable to the function generator output.
b. Press the DC 5010 LEVEL CH A button.
c. Adjust the DC 5010 Channel A triggering level using
the (increment) button until the GATE annunciator light (on
the display) just stops blinking.
d. Note the DC 5010 display readout (peak input
voltage).
e. Change the function generator Multiplier switch to
105.
REV JUL 1983