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From: Roger Johansson
Subject: Re: How good are Hitachi scopes?
Date: Fri, 04 Oct 2002 12:46:28 +0200
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email@example.com (The little lost angel) wrote:
I found the V-212 in an old catalog.
Sensitivity 1 mV/screen unit (the screen is 8*10 screen units)
Input impedance 1 MOhm 30 pF
Type of operation (function switch): CH1 CH2 ALT CHOP ADD
Sweep speed: 0.2 uS/screen unit
Power supply: 100, 120, 220-240 Volt +-10% 50/60 Hz
Weight: 6.5 kg
Sold with 2 probes, cables, manual.
price in sweden: 360 dollar in 1985
There was also a V-222, a more advanced model built on the same basic
In its spec I see the rise time 17.5 nS and it it probably the same
The 222 has inverting function for CH1 so it can subtract one signal
from another using the ADD function.
On the 212 you will have to invert one of the signals yourself and use
the ADD function.
max input voltage 500 Volt, peak-to peak without 10x probes.
The trig system is not described in detail, but it says the trig point
can be set over the whole period, which means that you can choose
negative or positive flank and any point on them.
The V-222 has trig functions:
Auto Normal tv-v tv-h ch1 ch2 v-mode line ext.
I think the V-212 probably has the same functions, but only the auto
mode is explicitly mentioned.
V-212 is a robust oscilloscope suitable for service and education.
(it says so in the spec)
Things like oscilloscopes do not lose their value like computers and
cars, it doesn't matter if you have a 20 year old scope.
It does what you need just as good as it did then.
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