Performance Check Procedure—2246 1Y and 2246 Mod A Service
EXTERNAL Z-AXIS, PROBE ADJUST AND FRONT-PANEL
SETUP FUNCTIONS
Equipment Required (See Table 4-1)
Calibration generator
BNC T-connector
Two 50 f l BNC coaxial cables
Test oscilloscope with a 10X probe
5 0 - fl Precision BNC coaxial cable
1. Check External Z-Axis Input
a. Set:
READOUT (Intensity)
A INTEN
Vertical MODE
CH 1 VOLTS/DIV
CH 2 INVERT
SCOPE BW
CH 1 Input COUPLING
Horizontal MODE
A SEC/DIV
A/B SELECT
Trigger MODE
Trigger CPLG
Trigger SOURCE
Trigger SLOPE
MEASMN’TS
Trigger HOLDOFF
FOCUS
Horizontal POSITION
For a viewable
readout
For a viewable
trace
CH 1
1 V
Off
Off
DC
A
0.5 ms
A Trigger
AUTO LEVEL
DC
VERT
- r
(positive)
All off (press
CLEAR DISPLAY
3 times)
Min
For best
defined display
12 o ’clock
b. Connect calibration generator (PG 506) Std
Ampl output to the CH 1 and the EXT Z-AXIS
inputs via a 5 0 - fl precision BNC coaxial cable, a
BNC T-connector, and a 5 0 - fl BNC coaxial ca
ble. Set generator to Std Ampl output, 5 V.
c. Set A INTEN to maximum intensity.
d. CHECK—waveform
display
intensity
starts
decreasing at 1.8 V or less and the waveform is
completely blanked out at 3.8 V.
e. Set A INTEN to midrange.
f.
Disconnect the test equipment from the 2246 1Y
or 2246 Mod A.
2. PROBE ADJUST Output
a. Set:
CH 1 Vertical MODE
10 mV
SEC/DIV
0.2 ms
SCOPE BW
On
b. Connect a 10X probe to the CH 1 input con
nector and connect the probe tip to the 2246 1Y
or 2246 Mod A PROBE ADJUST output. (When
using Tektronix coded probes the readout
changes to .IV .)
c. CHECK—For a 5-division vertical display of
PROBE ADJUST square-wave signal (square-
wave period is typically 1 ms, within 25%).
3. Run MAKE FACTORY SETTINGS Routine
a. Press the top and bottom Menu-Select buttons
to display the SERVICE MENU.
b. Press the down-arrow menu button three times
and press SELECT to display the INTERNAL SET
TINGS MENU.
c. Press the down-arrow menu button once and
press RUN to run the MAKE FACTORY SETTINGS
routine.
d. When the routine is finished, press the CLEAR
DISPLAY button to return to the normal oscil
loscope mode.
THIS COMPLETES THE
PERFORMANCE CHECK
PROCEDURE.
4-28
Summary of Contents for 2246 1Y
Page 13: ...2246A Service 7062 01 X The 2246 1Y or 2246 Mod A Portable Oscilloscope ...
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Page 304: ...A D D J U N 1991 ...
Page 311: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 1 0 V r l III B f e I l i 6555 39 ...
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Page 321: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 2 SET READOUT CONTROL CCW OFF 6555 40 ...
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Page 326: ...A B C P E F G ...
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Page 347: ...BEV JUNE 1991 7062 18 ...
Page 349: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 6 6555 43 I ...
Page 355: ...I BOARD LOCATION 8K 8J 8H 7H 8H 8H 7J 8D 7H 8H 8J 8J 7K 8K 10D 6L 6K 6L 6K 6G 5H I ...
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Page 400: ...REV JUNE 1991 7062 39 ...
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