Tektronix TYPE L Instruction Manual page 29

C5222
C5292
C5362
V ert. Pos. Range
R6572
V6042 Cathode Current Adj,
R5922
Fig. 5-2. Location of left-side internal adjustments and input attenuator adjustments.
Set the TIME/CM switch at 50 M ILLISEC,
the AC-DC switch at X10 GAIN AC, and the
VOLTS/CM switch at .005. Apply a 50 cycle
square wave from the Type 105 to the INPUT
of the Type L Unit through approximately 250
to 1000X attenuation. Short the input blocking
capacitor (C5001) with the resistive shorting
strap. Adjust the amplitude of the display to
about 3 cm with the OUTPUT
control on the Type 105. Set the Low Freq.
Adj. control on the left side of the L Unit
fo r optimum level top of the square wave.
Remove the clip lead.
16. High-Frequency Peak in g
Adjustment
The H.F. Peaking
Stage of the Type L provides for matching
the impedance of the cathode circuit to the
output peaking coils fo r best high-frequency
response.
Remove the Type EP54 Plug-In Extension.
Set the TIME/CM switch at .2 pSEC, VOLTS/
CM at .05 and the AC-DC switch at DC. Install
a 50ft Terminating
AA
Low F req . Adj.
R6182
AM PLITUDE
control in the Output
Resistor on the INPUT
Calibration Procedure - Type L Plug-In
C5072
connector of the Type L Unit. Apply a square
wave of approximately 450 kc from a Tektronix
Type 107 Square-Wave Generator to the T e r ­
minating Resistor on the Type L. Adjust the
display amplitude with the
AM PLITUDE control on the Type 107 to approxi­
mately 3 cm. Adjust the H. F. Peaking control
on the bottom side of the Type L for a square-
cornered waveform with no overshoot.
17. X10 Am plifier H igh-Frequency
Adjustments
Three variable peaking coils are provided
in the X10 am plifier fo r adjusting its frequency
response.
With other controls set as in step 16, turn
the AC-DC switch to X10 GAIN AC. With the
50ft Terminating Resistor on the INPUT con­
nector of the Type
Attenuator and apply a 450 kc square wave
from the Type 107 as before.
display amplitude to approximately 3 cm with
the APPROXIM ATE
the Type 107. Adjust coils L5902, L5942 and
L6012 fo r a square
C5272
C5342
C5412
C5502
C5602
C5432
APPROXIM ATE
L , install also a 10X
Adjust the
AMPLITUDE control on
leading corner of the
5-5