7012 Operating Instructions; Display Modes; 7012 Installation - Tektronix 7D12 Operator's Instruction Manual

701 2 Operating Instructions-701 2 Operators
Display Modes
The vertical display and the internal gate display can be
operated in either alternate or chop mode, depending Upon
the internal Display Mode switch set1Jn9; see Fig. 1-3.
Alternate Mode. The All position (toward front panel)
of the Display Mode
~i tch
produces a display that
alternates between the vertical display and the gate display
with each sweep on the CRT. Although the Alt mode can
be used at all sweep rates, the Chop mode provides a more
satisfa ctory display at sweep rates below about 0.2 milli-
second per division . At slow sweep rates, alternate mode
SNi tching becomes visually per~ptible.
Chop Mode. The Chop position howard rear) of the
Display Mode switch produces a display that is electron-
ically
switched between
the input display and the trigger
gate display at app rox imately a 500 kilohertz rate (con·
trolled by mainframe) . In general, the Chop mode provides
the best display at sweep rates slower tha n about 0.2 milli·
second per division.
701 2 Installation
Extreme car e should be exercised when handHng the
7012 to prevent touching any part of the circuit
boards. This unit contains several high impedance
circuits which can develop inter·leakage
if
con tam i-
nated by body salts or acids.
FiQ. 1.3. O iw ley mode swlto;h 1 000~ tio n "nd l uno; l 'o n$.
' -2
Avoid the use of chemical cleaning agents which
might damage the plastics used in chis instrument.
Avoid chemicals that contain benzene, toluene,
acetone or similar solvents. Recommended cleaning
agents are isopropyl alcohol or KeHte
(1
part Kelite ,
20 pans water}.
The 7012 is calibrated and ready for use with a module
as received. It can be installed in any compartment of
Tektronix 7oo0·serie5 oscitloscopes, but is intended prin-
cipally for use in vertical plug· in compartments. To install,
align the upper and lower rails of the 70 12 wit h the
oscilloscope tracks and tully insert it. The front is flush
w ith the front of the oscilloscope when the 7012 is fully
Inserted, and the latch at the bottom-Ielt corner of the
7012 will be in place against the front-panel. See Fig. 1-4.
Set the oscilloscope for a vertical mode to correspond
with the vertical compartment used when an analog signal is
to be displayed. The digital readou t w ill be displayed
regardless of the vertical mode selected.
To remove the 7012, pull on the latch (which is
inscribed with the unit Identification "7012") and the
F'Q. 1-4 . 7012 And m Odu le In~tall a lion.
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