Adjust Xi0 Horizontal Amplifier Gain; Adjust Magnifier Registration; Adjust Delay Dial Timing; Adjust 5-Ks Timing - Tektronix 2235A Instruction Manual

Adjustment Procedure
-
2235A Instruction
2. Adjust X I 0 Horizontal Amplifier Gain (R754)
a. Set:
Horizontal MODE A
XI0 Magnifier On (knob out)
b. Select 10-ks time markers from the time-mark
generator.
c. Align the nearest time marker to the first vertical
graticule line with the first graticule line.
d. ADJUST-XI0 Gain (R754) for 1 time marker per
division.
3. Adjust Magnifier Registration (R749)
a. Set the A SEC/DIV switch to 0.2 ms.
b. Select 1-ms time markers from the time-mark
generator.
c. Position the middle time marker to the centervertical
graticule line using the Horizontal POSITION
control.
d. Set the XI0 Magnifier to Off (knob in).
e. ADJUST- Mag Regis (R749) to position the middle
time marker to the center vertical graticule line.
f. Set the XI 0 Magnifier to On (knob out) and CHECK
for no horizontal shift in the time marker.
g. Repeat parts c through f until no further improvement
is noted.
4. Adjust Delay Dial Timing (R646 and R652)
a. Set:
Horizontal MODE ALT
A SEC/DIV 0.1 ms
B SEC/DIV 10 k s
SECIDIV Variable CAL detent
XI0 Magnifier Off (knob in)
B DELAY TIME POSITION 1 .OO
b. Select 0.1-ms time markers from the time-mark
generator.
c. Adjust the A/B SWP SEP control to separate the A
and B Sweeps.
ADJUST-Delay Start (R646) so that the 2nd
A-Sweep time marker is intensified and the
B-Sweep time marker's rising edge starts at the
beginning of the B Sweep.
Set the B DELAY TlME POSITION dial to 9.00.
ADJUST-Delay End (R652) so that the 10th
A-Sweep time marker is intensified and the
B-Sweep time marker's rising edge starts at the
beginning of the B Sweep.
Set the B DELAY TIME POSITION dial to 1.00.
Repeat parts d through g until no further improve-
ment is noted.
Adjust 5 k s Timing (C703 and C713)
Set:
Horizontal MODE
A SEC/DIV
Select 5-ks time markers from the time-mark
generator.
ADJUST-A Sweep 5-ks Timirlg (C703) for 1 time
marker per division over the center 8 divisions.
Set:
Horizontal MODE
A SEC/DIV
B SEC/DIV
ADJUST- B Sweep 5-ks Timing (C713) for 1 time
marker per division over the center 8 divisions.
6. Adjust 5-ns Timing and Linearity (C774)
a. Set:
CH 1 VOLTS/DIV 0.2 V
Horizontal MODE A
A SEC/DIV 0.05 k s
A & B SOURCE A EXT
b. Connect a 5 0 4 cable and a 50-$2 termination to the
EXT INPUT connector from the time-mark generator.
c. Select 5-ns time markers from the time-mark
generator and set the start of the display on the 1 st
vertical graticule line.
d. Set the XI0 Magnifier to On (knob out).
Scans
by ARTEK MEDL4
=>