Tektronix TYPE CA Instruction Manual page 7

Plug the unit into a Tektronix convertible
Oscilloscope and turn the power on. Allow
the instrument to reach operating temperature,
about 2 to 3 minutes and free-run the sweep
at 1 millisecond/cm. Turn the MODE switch
to A ONLY and the A-channel POLARITY and
AC-DC switches to NORMAL and DC respect ­
ively. Position the trace to about +2 cm with
the A-channel VERTICAL PO ITION control.
Turn the MODE switch to B ONLY and the
B-channel POLARITY and AC-DC switches
to NORMAL and DC respectively. Position the
trace to about -2 cm with the B-channel VER ­
TICAL PO ITION control.
Now turn the MODE switch to CHOPPED.
Two traces will appear on the crt screen.
Notice that the A-channel VERTICAL PO ITION
control moves the upper trace and the B-
channel VERTICAL PO ITION control moves the
lower trace. Increase the sweep speed to 100
microsecond/cm and notice that each trace
is composed of many start-duration elements.
The two channels are being switched at approx ­
ATTENUA-
PROBE COLOR
TYPE CODE
Brown
P410 10:1
nose
P510 Black 10:1
Nose
P6000 None 10:1
None 10:1
P6017
*When connected to instruments having 20
**When connected to instruments with input capacitance up to 50 ppf.
t With 8-foot cable.
AA
PROBE CHARACTERI TIC
INPUT IMPEDANCE
Resistance
TION
RATIO (megohms) Minimum*
10 8pf
12pf †
10
10 11.5pf
10 12.5pf
capacitance (input).
i i
Operating Instructions - Type CA
OPERATING
INSTRUCTIONS
imately 100 kc so that each channel conducts
for about 5 μ sec and then is cut off while the
other channel conducts for an equal time.
Now turn the MODE switch to the
position. There are still two traces
screen but the traces are no
into small bits. For each sweep cycle
nel is conducting and the other
The channels are switched at the
sweep cycle.
Either of the two identical
filied channels can be used
dependently by turning the
switch to A ONLY or B
and connecting the signal
observed to the appropriate
The following remarks apply
well to either amplifier
IN ERTION
Typical Capacitance
Maximum** 30 m c (db)
1
ll pf
15 pf †
1
14pf
14.5pf 1.2
1
12.5pf
ALTERNATE
on the crt
longer chopped
one chan ­
is cut off.
end of each
Note
amp-
in ­
MODE
ONLY
to be
input.
equally
channel.
VOLTAGE
LO AT RATING
(Peak-to-Peak)
600
600
600
600
2-1