K- Phase -H Cursor A C C U Ra C Y; K- Volts -H Cursor A C C U Ra C Y; Tracking Cursors Position Accuracy; K- Volts-* Cursor Accuracy - Tektronix 2246 1Y Service Manual

Performance Check Procedure—2246 1Y and 2246 Mod A Service
3. k- PHASE-* Cursor Accuracy
a. Set generator for 1 ms time marks.
b. Set:
Horizontal MODE
A TIME/DIV
c. Set TIME menu on.
d. Press k- PHASE-* menu selection to display the
k- PHASER and k- SET 360 °-*
e. Set I*- SET 3 6 0 °-*
f. Position the first time marker to first graticule
line. Then position the Reference cursor to the
leading edge of the second time marker and the
delta cursor to the leading edge of the tenth
tim e-m arker.
g. SET k~ PHASE-* on.
h. Position delta cursor to the leading edge of the
sixth time marker.
i. CHECK—that the readout is between 177.9 and
182.1 degrees.
j. Disconnect tim e-m ark generator.

4. k- VOLTS-* Cursor Accuracy

a. Set:
CH 1 VOLTS/DIV
SEC/DIV
CURSORS Menu
k- VOLTS-* CURSORS
b. Connect calibration generator (PG 506) STD
AMPL output to the CH 1 input via a 5 0 -n preci­
sion BNC coaxial cable.
c. Set calibration generator to STD AMPL and
AMPLITUDE to 0.5 V.
d. Position bottom of the signal to the second hori­
zontal graticule line from the bottom.
e. Position the reference cursor to the bottom of
the signal and the delta cursor to the top of the
signal (both cursors move with the k- OR DELAY
co ntro l).
4-24
A
1 ms
menu choices.
on.
0.1 V
0.5 ms
On
On
f. CHECK—that the readout is between 0.495 V
and 0.505 V.
5. fh VOLTS'* Cursor Accuracy
a. Select MEASUREMENTS CURSORS menu, then
select rb VOLTS-* CURSORS.
b. Position -* control to align the delta cursor with
the top of the waveform.
c. CHECK—that the readout is between 0.495 V to
0.505 V, and none of the cursors move when
the k- OR DELAY control is rotated.

6. Tracking Cursors Position Accuracy

a. Press CLEAR DISPLAY (press twice).
b. Set:
CH 1 VOLTS/DIV
MEASUREMENTS CURSORS
Menu
AUTO TRACKING MENU
TRACK TRIG LVL
TRACK fb
MENU
Trigger MODE
c. Connect calibration generator Std Ampl output
via a 5 0 -fI BNC cable to the CH 1 input.
d. Set calibration generator for Std Ampl output of
0.5 V.
e. Adjust Trigger LEVEL control to align trigger level
cursor with the bottom of the signal.
f. CHECK—the readout is 0.000 V +0.005 V, and
the GND cursor is aligned with the bottom of the
signal.
g. Set trigger level cursor to align with the top of
the signal.
h. CHECK—the readout is between 0.475 V and
0.525 V.
i. Press CLEAR DISPLAY.
j. Disconnect test equipment if ending here.
0.1 V
On
On
On
On
Off
AUTO (not
AUTO LEVEL)