Vertical Channels; Horizontal Channel - Philips PM 3214 Anleitung

17
2.2.2
Vertical channels
Display mode switch
A —ALT —CHOP —ADD — B
A
Function
5-way pushbutton switch selecting the vertical display mode.
With all buttons released, the ALT mode is in operation.
Vertical deflection is achieved by the signal connected to the input
of channel A.
ALT
The display is switched over from one vertical channel to the other
at the end of every cycle of the timebase signal.
CHOP The display is switched over from one vertical channel to the other
at a fixed frequency. (f ~ 500 kHz)
ADD
Vertical deflection is achieved by the sum signal of channels A and B.
B
Vertical deflection is achieved by the signal connected to the input
of channel B.
POSITION
Continuously variable controls giving vertical shift of the display.
PULL TO INVERT B
Push-pull switch combined with the channel B POSITION control.
When pulled, channel B signal is inverted.
AMPL/DIV (outer)
Step control of the vertical deflection coefficients, ranging from
2 mV/div up to 10 V/div in a 1-2-5 sequence.
AMPL/DIV (centre-knob►
Continuously variable control of the vertical deflection coefficients.
Note that the deflection coefficient is calibrated only with the
centre-knob switched to the CAL position (fully-clockwise).
/nputcoup/ingswitch Signal coupling; 2-way pushbutton switch
AC/DC — 0
AC (depressed)
DC (released)
0 (depressed)
A (1MSZ//20pF)
B (1MSZ//20pF)
2.2.3 Horizontal channel
X deflection source switch
DTB
MTB — XDEFL
~-- A LT T B --~
Coupling via a blocking capacitor
Direct coupling
Connection between input circuit and input socket is interrupted and
the input circuit is grounded.
BNC socket for channel A input
BNC socket for channel B input
Function
HorizontalcJeflection controls; 3-way pushbutton switch
DTB The horizontal deflection voltage is supplied by the delayed time-
base generator.
MTB The horizontal deflection voltage is supplied by the main timebase
generator. A portion of the trace is intensified when the delayed
timebase is running.
The delayed timebase generator is switched off when the
DELD TIME/DIV switch is in the OFF position.
If no buttons are depressed the effect is the same as the MTB button
depressed (only the MTB LEVEL control is not operating in this
situation).
DTB
MTB When both the DTB and MTB pushbuttons are selected simultaneously,
LALT TB—~ the horizontal deflection voltage is supplied by the main and delayed
timebases alternately.
X DEFL
Horizontal deflection is achieved by an external signal applied to
the input socket of the horizontal amplifier, by the channel A signal,
the channel B signal, or by amains-frequency signal.