Tektronix 114, Инструкция по эксплуатации

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Maintenance and Calibration — Type 114
Fig. 4-5, Control settngs for PERIOD CAL adjustment.
6. Adjust PERIOD CAL control R125
a. Set the Type 114 WIDTH — VARIABLE control to CAL
Turn the WIDTH control to 1 µ S and the PERIOD control to
100 µ (see Fig 4-5).
b. Reconnect the Type 114 OUTPUT to the Type 1A1
Channel 1 input through the 50 Ω coax and the 50 Ω
termination.
c. Connect a 50 Ω coax cable from the Type 180A MARK ­
ER OUT connector to the Type 1A1 Channel 2 input. Set the
Type 180A for 100 microsecond markers.
d. Set the Type 1A1 Channel 2 VOLTS/CM switch to 2
Turn the MODE switch Io CH 2. Pull out the Channel 2 PULL
TO INVERT switch.
e. Set the Type 547 HORIZONTAL DISPLAY switch to B
Set the TIME/CM (B) switch to .1 mSEC. Set the TRIGGER­
ING-SOURCE switch to INT-NORM, the SLOPE switch to — ,
and the MODE switch to TRIG. Adjust the TRIGGERING
LEVEL control for a stable display of the 100 microsecond
markers from the Type 1 80A.
f. Ch ange the Type 1A1 MODE switch to ALT and the
Channel 1 VOLTS/CM switch to 5. Using the Type 1 A1
POSITION controls, position the display so that the peaks of
the pulses from the Type 114 are vertically displaced about
1 mm below the peaks of the inverted pulses from the Type
1 80A on the other trace.
g. Adjust the PERIOD CAL control R125 (se e Fig. 4-6 ) so
that the corresponding pulses in the two traces are aligned
horizontally to within ½ % ( see Fig. 4-7).
Fig 4-6 . Location of PERIOD CAL control R125.
Fig. 4-7. Crt display showing correct adjustment of PERIOD CAL
control.
4-6