Tesla BM 510, Instruction Manual

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POPIS OBVODÛ
Vertikâlni zesilovad (obr. 18)
DESCRIPTION OF CIRCUITRY
Vertical Amplifier (Fig. 18)
vstupni dglië
vstupni dëliC input divider
input divider
Zesiiovag md symetricky vstup s moznosti
uzemngni kterghokoliv vstupu, to znamend vy-
tvofeni nesymetrickeho vstupu. Vazba s mefe-
nym obvodem ]e bud'to stejnosmgrnó nebo
stfidavd pfes oddglovaci kondenzśtor. Citlivost
zesilovage je 20 mVss. Signśl je primo nebo
pfes vstupni dglig pfiveden na symetricky ka-
todovy sledovag a odtud na symetricky zesilu-
jic i stupeń, ktery pfi nesymetrickśm provozu
funguje jako emitorovy invertor. V emitorech
tohoto stupng je możno zmgnou zśporne zpgtne
vazby plynule mgnit zesileni. Takto zesileny
signdl je pfiveden na koncovy stupeń, ktery je
tvofen kaskodou tranzistor elektronka. V emi­
torech tranzistoru koncovgho stupng je pomoci
zdporne zpgtne vazby provedena kalibrace ze­
sileni a rovngz je zde kmitogtovg z&visld zpgtnd
vazba, umożńujici korekci kmitoctove charakte-
ristiky zesilovace s ohledem na vys^i kmitocty.
Z koncoveho stupng je odebirśn zesileny sig­
nal pro synchronizaci Casove zSkladny.
The input of the amplifier is symmetrical with
a possibility to earth any of the input chan­
nels to provide for an asymmetrical input. The
coupling with the circuit being measured is
either galvanic or capacitive via a blocking
capacitor. The sensitivity of the amplifier is
20 mVp.p. The signal is supplied to a symmetri­
cal cathode follower either directly or through
an input divider, and is passed on to a sym­
m etrical amplification stage acting as an emit­
ter inverter in the case of asymmetrical ope­
ration. The amplification can be continuously
controlled by changing the negative feedback
in the emitter circuits of this stage. The ampli­
fied signal is supplied to an output stage con­
sisting in a transistor-tube cascode. A negative
feedback in the emitter circuits of the output-
-stage transistors provides for amplification
calibration. A frequency-dependent feedback
is also provided here to enable correction
of the frequency characteristic of the ampli­
fier in the high-frequency range. The ampli­
fied signal is taken off the output stage to
trigger the time base.
Horizontalni zesiiovag (obr. 18)
Horizontślni zesilovac pracuje v reżimu ,,XY“
shodng s vertikdlnim. Rozdil je pouze pfi pro­
vozu s casovou zśkladnou. V tomto pfipadg je
mfiźka jednoho katodoveho sledovace uzemng-
na, do mfiźky druhśho katodoveho sledovace
Horizontal Amplifier (Fig. 18)
The horizontal amplifier operates in “XY“
mode identically with the vertical one, the
only difference being in the time-base mode
of operation. In this case, the grid of one of
the cathode followers is earthed, the sawtooth
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