Tektronix 2205 - Page 93

line—A nother trigger source (the power line).
Normal (NORM)~Allows selection of any TRIGGER LEVEL within
approximately ±15 divisions.
Peak to Peak Automatic (P-P AUTO)—Limits TRIGGER LEVEL to
a range determined by peaks of signal. If no signal appears in
about 5 ms, the sweep starts on its own to show a "baseline.”
RESET—This button is used only in SGL SWP Mode to reset the
sweep. (See TRIGGER for single sweep.)
Single Sweep (SGL SWP)—A mode in which, when a trigger oc¬
curs, only one sweep will run.
SLOPE—Determines whether the trigger point will occur on the
raising or falling edge of the signal.
Trigger Ready (TRIG’D)—Lights when the sweep is triggered.
Television Field (TV FIELD)—Trigger on tv fields.
Television Line (TV LINE)—Trigger on tv lines.
Vertical Mode (VERT MODE)—Trigger source is determined by
the Vertical Mode.
OTHERS
Alternation—A change in polarity, like a positive (+) changing
directions to a negative (~) and back again.
Cathode-Ray Tube (CRT)—The picture tube.
Divisions—The lines that divide CRT display area units into X and
Y components.
Graticule—The square boxes formed by lines on the CRT face.
Hertz—The basic unit of frequency.
Ohm (D,)—The basic unit of resistance.
Polarity—The positive (+) or negative (-) direction of voltage or
current.
2205 Operator’s
C-3