tek475
Up
Calibrated Tektronix 475 DM44 200 MHz
Oscilloscope!
Click here for pictures
The 475 Oscilloscope is a 200 megahertz bandwidth portable instrument
designed to operate in a wide range of environmental conditions. The
lightweight, compact design combines accurate high-frequency measurement
capability and ease of transportation. The dual-channel, DC-to-200
megahertz vertical deflection system provides calibrated deflection
factors from 2 millivolts to 5 volts/division. A BW/TRIG VIEW switch
permits limiting the bandwidth of the vertical system to reduce
interference from high-frequency signals when viewing lower-frequency,
low-level signals. The switch also permits displaying of the signal
applied to the 'A'Trigger Generator on the CRT. The trigger circuits
provide stable sweep triggering to beyond the 200 megahertz bandwidth of
the vertical deflection system. Separate controls are provided to select
the desired mode of triggering for the A and B sweeps. The A sweep can be
operated in one of three modes; automatic triggering, normal triggering,
or single sweep. A variable trigger hold off control permits the A sweep
to trigger in a stable manner on a periodic signals or complex digital
words. The horizontal deflection system has calibrated sweep rates from
0.5 second to 0.01 microsecond/division. A X10 magnifier increases each
sweep rate by a factor of 10 to provide a maximum sweep rate of one
nanosecond per division in the .01 us position. The delayed and mixed
sweep features allow the start of B sweep to be delayed a selected
amount from the start of A sweep to provide accurate relative-time
measurements. Calibrated X-Y measurements can be made with Channel 2
providing the vertical deflection and Channel 1 providing the horizontal
deflection (TIME/DIV switch fully counterclockwise and VERT MODE
switch to CH 2). Regulated DC power supplies provide stable instrument
performance over a wide range of line voltages and frequencies. Maximum
power consumption of the instrument is approximately 100 watts. This is
pre-owned item and it has been tested and working great. It comes with
no manual nor probe except power cord.
What's special about the 475?
The 475 scopes were produced from 1973 to 1984 and cost $3910. I believe
that the
475 scope was the first solid state 200 MHz portable scope with a full size 8
X 10 cm
display. It is a compact, relatively light weight scope. Standard features
include dual
trace, 200 MHZ bandwidth, dual timebase with delayed sweep. The DM44 option
adds
a digital volt-ohmmeter plus digital time delay measurements. The 475 is one
of the
best portable scopes ever made and was the favorite
of many technicians until the introduction of the Tek 2465 in the late
eighties. 15 years
later, the 475 is still a great scope and very cost effective compared to new
scopes.
Tucker Electronics sells calibrated 475's for $995- !
What's included with the 475?
This scope may need recalibration (or maybe it dos not). Included with
the scope is the power cord and functional DM44.
Sorry, no probes, manual or front cover. We provide
a 5 day right of return if the buyer is not satisfied. Buyer pays return
shipping.
(Click on the thumbnail images to enlarge)
