Philips PM 3210 Operating Manual page 13

25 mhz duai-trace oscilloscope
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Channel A/B
AC-0—DC (SK9/SK 11)
AMPL. (SK12/SK 13)
CAL-AMPL. (R8/R13)
GAIN ADJ. (R9/R12)
(screw-driver operated)
DC BAL (R10/R11)
(screw-driver operated)
1 MQ/15 pF (BU3/BUS)
SHIFT (R14/R15)
PULL FOR —A/—B (SK14/SK 15)
Cathode Ray Tube Controls
INTENS. (R2)
FOCUS (R3)
ILLUM. (RS)
Miscellaneous Controls
POWER ON (SK1)
CAL. 1 V (BU2)
= (BU4)
Sockets on the rear panel (Fig. 4)
TB OUT (BU6)
Y OUT (BU7)
Z-MOD (BU8)
23
ADDED
: vertical deflection is achieved by the sum signal of
channels A and B.
XY
: horizontal deflection is achieved by a signal applied to
the B channel and vertical deflection by a signal
connected to the A channel.
B
: vertical deflection is achieved by the signal connected to
the channel B input.
signal coupling, three position switch:
AC : via a coupling capacitor.
0:
interruption of connection between input socket and input circuit,
the latter being earthed.
DC : direct coupling.
control of the vertical deflection coefficients, 14-way switch.
continuously variable control of the vertical deflection coefficients. In the
CAL. position the deflection coefficient is calibrated.
continuously variable control of the gain of the vertical channels.
continuously variable control of the direct voltage balance of the vertical
amplifiers.
input BNC socket for the vertical deflection signals.
continuously variable control giving vertical positioning of the display.
push-button control for inversion of the signal polarity.
variable control of trace brightness.
variable control of electron beam focusing.
variable control of graticule illumination.
toggle switch for the mains supply to the oscilloscope.
output BNC socket for 1 V square-wave voltage for calibration purpos s.
earth socket.
sawtooth output BNC socket.
Y-amplifier output BNC socket.
input BNC socket for intensity-modulation voltages.

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