Tektronix 7D20 Operator's Manual page 37

Operating Instructions-7D20
Operating Instructions-7D 20
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TRIGGERING
+SLOPE-Selects positive slope for triggering when illuminated . When
not illuminated, -slope is used .
averaged N number of times then enters HOLD mode .
LEVEL-Adjusts the triggering level .
TRIG'D-Indicator illuminates when waveform being digitized is
triggered .
SOURCE-These keys select the source of the trigger signal .
COUPLING-These keys select trigger coupling .
MODE-These keys are used to select the triggering mode, including
HOLD NEXT .
a TRIG POS ~-Adjusts the trigger position with respect to the display
graticule for pretrigger and post trigger operation .
VECTOR-When illuminated connects adjacent dots with vectors .
O
TIME/DIV-Selects the digitizing rates and EXT mode . Control setting
appears in the display .
HORIZ
POSITION-Adjusts the horizontal
position of the stored
displayed waveforms .
DISPLAY CAL-These screwdriver adjustments calibrate the 7D20
display to match the host mainframe .
IEEE STD 488 PORT-Allows connection to GPIB .
SIGNAL PROCESSING
HOLD-Stops all digitizing and HOLDS the current waveforms in
memory .
AVE-Causes the waveforms) being digitized to be continuously
averaged .
ENV-Causes the waveforms) being digitized to be continuously
enveloped .
SET N-Sets the value of N .
REV SEPT 82
SIGNAL PROCESSING (cont)
AVE N-Shift function causes the waveforms) being digitized to be
ENV N-Shift function causes the waveforms) being digitized to be
enveloped N number of times then enters HOLD mode .
MENU-Causes the 7D20 menus) to be displayed .
GPIB
TEST-Shift function causes the 7D20 TEST menus to be displayed .
EXT TRIG-Bnc connector for connection of external trigger signal .
ROS-Causes a service request to be asserted over the GPIB .
ROS #f-Shift function permits selection of 6 unique SRO event codes .
ID-Produces special GPIB menu for selection of system parameters .
SRO-Key illuminates when service request is asserted over the GPIB .
ADDR-Key illuminates when 7D20 is addressed through GPIB .
REMOTE ONLY-When illuminated indicates that front panel is under
GPIB control . Local operation locked out .
s
EXT CLOCK-Bnc connector for EXTernal CLOCK signal input .
~ Instrument serial number .
Latching mechanism . Pull to release from mainframe .
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