Tektronix CA PLUG-IN Instruction Manual page 18

7. Tektronix 20pf Input Capacitance Standard-
iz e r , Tektronix part number 011-022.
8. 50 ohm 5XT attenuator, Tektronix
Number 011-032.
9. 50 ohm cable termination, Tektronix Part
Number 011-045.
10. Tektronix Type P52 C oaxialC ables,52ohms
characteristic impedance.
11. Tektronix Dual Input Connector, see Fig.
5-1. Tektronix
12. Miscellaneous alignment tools.
5-2.
PROCEDURE
1 . Prelim inary Check
B efore installing the Type CA Plug-In Unit
in the oscilloscope, make
inspection of the w ire dress. This
ticularly important if any soldering has been
done to the unit. Then make the following
F ig . 5-2. Low capacitance, insulated alignment tools used to calibrate
the Typ e C A.
5-2
Part
Part Number 003-035.
See Fig.
a careful visual
is par-
Calibration - Type CA
resistance-to-ground checks at thelö-pininter-
connecting plug. The table below lists the
nominal resistance value from each pin to
ground.
NOMINAL RESISTANCES AT
INTERCONNECTING PLUG
RESISTANCE-TO-GROUND
PIN NUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Install the Type CA Unit in the oscilloscope.
Turn on all the test equipment
15 minutes fo r it to warm up. Set the o s c illo ­
scope Controls as follows:
HORIZONTAL DISPLAY
TRIGGERING MODE
TRIGGER SLOPE
S TA B ILITY
TIME/CM
Now preset the Type CA Controls as follows:
VOLTS/CM (A and B)
8.5k
0
8.5k
infinite
infinite
infinite
infinite
0 (MODE switch
at ALTERN ATE )
12k
2k
6.3k
infinite
infinite
infinite
650
infinite
and allow
INTERNAL
SWEEP (541A)
MAIN SWEEP
NORMAL
(545 A)
AUTOMATIC
-IN T
PRESET
1 MILLISEC
.05
AA
1