Tektronix 2246 User Manual

Operator’s Checks and Adjustments--2246 Operators
1. Preset instrument controls and obtain a baseline
trace as described in "Initial Setup.” Set the CH 1
VOLTS/DIV setting to 100 mV.
2. Connect the two supplied 10X probes to the CH 1
and CH 2 BNC input connectors. l
3. Connect the probe tips to the CALIBRATOR loop
and connect the probe ground leads to scope ground.
4. Use the CH 1 Vertical POSITION control to center
the five-division CALIBRATOR square wave in the grati-
cule area.
5. Check the square-wave signal for overshoot and
rolloff (see Figure 5-1). If necessary, use the special adjust-
ment tool supplied in the probe accessory package to
adjust the low-frequency compensation for a square front
corner on the square wave.
6. Press the CH 2 VERTICAL MODE button to turn
CH 2 on in the display, and press the CH 1 Mode button
to remove the CH 1 trace from the display.
7. Set the CH 2 VOLTS/DIV setting to 100 mV and
vertically center the CALIBRATOR signal.
8. Repeat Step 5 for the second probe on the CH 2
BNC input connector.
CORRECT
{FLAT}
i
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PENSATED
(OVERSHOOT)
UNDER COM-
PENSATED
{ROLLOFF)
4207-11A
Figure 5-1. Probe Compensation.
5-2
NOTE
Refer to the instruction manual supplied with the
probe for more detailed information about the probes
and adjustment procedure.
VERTICAL DEFLECTION CHECK
The CALIBRATOR output signal may be used to check
the Channel 1 and Channel 2 vertical deflection system in
the following procedure:
1. Set the instrument controls to obtain a baseline
trace as described in “Initial Setup.”
2, Connect the two 10X probes supplied with the
instrument to the CH 1 OR X and CH 2 input connectors
(scale factor readout switches to 0.1 VOLTS/DIV for the
attached 10X probes).
3. Connect both probe hook tips to the CALIBRATOR
output connector.
4. Set the bottom of the trace of the CALIBRATOR
square-wave signal to a convenient horizontal graticule line
with the Vertical POSITION control.
5. Check for a five-division display of the CALIBRA-
TOR square-wave signal.
TIMING CHECKS
The time measurement cursors may be use to check
the accuracy of the horizontal deflection system.
1. Preset instrument controls and obtain a baseline
trace as described in “Initial Setup.” Vertically center the
baseline trace.
2. Press the CURSORS button to call up the Cursor
Measurement Mode menu on the ert and select l- SEC -l
function for measuring time difference by pressing the
Menu Select button opposite the menu label.
3. Align the reference cursor to the second vertical
graticule line using the l- OR DELAY control (both cursors
are positioned together).
REV APR 1987
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Tektronix 2246 Specifications

General

Brand	Tektronix
Model	2246
Category	Test Equipment
Language	English