Horizontal; Horizontal Controls And Indicators - Tektronix 2247A Operator's Manual

Controls, Connectors, and· fndicators
Horizontal
Refer to Figure 2-4 for location of Items 24 through 31.
@
POSITION Control-Adjusts the horizontal position of t he waveform
displays on the crt.
®
2-8
X10 MAG Switch-Magnifies the A and B sweeps by a f actor of 10
and extends the fastest sweep speed to 2 ns per division . The cent r
portion of an unmagnified sweep display will be within O. 5 division of
the center of a magnified sweep display . No action occurs In X Y
mode .
When X10 MAG Is on, a X10 symbol ls displayed next to the SEC/DIV
readouts. The readouts reflect correct display sweep speed s for th
X10 MAG displays and the unmagnified displays.
MODE Buttons (Up-Arrow and Down-Arrow) and Indi-
cators-Select the operating mode of the horizontal defl ection
system. Pressing the Up-/Down-Arrow buttons selects the horlzont I
deflection mode as shown by the MODE lights. Not all Menu Measur
ment modes are compatible with all horizontal deflection modes. So
Table 3-1, Behavior for Horizontal MODE Changes , in Section 3.
A-Selects A sweep horizontal deflection . The A sweep speed
determined by the A SEC/DIV switch setting as displayed In the crt
readout. Whenever A MODE is selected , the A/B SELECT switch I
set to A Trigger.
ALT-Alternates between A sweep (with an Intensified zone repr
sentlng B sweep) and B delayed sweep . Both A and B SEC/DIV switch
settings are displayed In the crt readout, but only the B can b
adjusted. Whenever ALT MODE Is selected , the A/B SELE CT switch
Is set to B Trigger.
The B sweep speed cannot be set slower than the A sweep speed:
attempting to do so forces the A sweep speed to follow the B sweep
speed . To Increase the A sweep speed in the ALT MODE , set the
Horizontal MODE to A, adjust the SEC/DIV switch to a faster A sweep
setting, and reset the Horizontal MODE switch to ALT. The B sweep
speed and the length of the intensified zone are determined by the B
SEC/DIV switch setting.
2247 A Ope rators
Controls , Connectors, and Indicators
•
•
HOLD : MIN SETUP
CURSORS/TIME POSITION
f,;;;\
XlO MAG
~•
UNCAL :
A
ALT
A
AND
8 SEC/DIV
B
f:11
TRACE SEP
~
-Q-POSITION
{ > ~ '
Figure 2-4 . Horizontal controls and Indicators.
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6373-0SA
B-Select B sweep horizontal deflection . The B sweep speed is
determ ined by the B SEC/DIV switch setting as displayed in the crt
readout . Whenever B MODE is selected , the A/8 SELECT switch is
set to B Trigger.
The start of t he B sweep in RUNS AFTER mode (or the arming of the
B Trigger in any triggered mode) is delayed from the start of the A
sweep by a t ime determined by the setting of the If- OR DELAY con-
trol. The B SEC/DIV switch setting and the Delay Time Position
2247 A Operators
2-9