Philips PM3208 Service Manual page 14

CHARACTERISTICS SPECIFICATION ADDITIONAL INFORMATION
2.4 EXTERNAL INPUT
Input connector BNC
Input impedance:
R parallel 1MQ+ 2% Measured at frequencies
< 1 MHz.
C parallel 30 pF
Input voltage limits +100 V Instrument should be properly
(d.c. + a.c. peak) grounded through the
protective-ground conductor of
the power cord
2.5 HORIZONTAL DEFLECTION OR X AXIS
Deflection sources MTB
EXT. through Ch. A See Section 2.7
Through EXTernal input Selected by MTB trigger source
selector
Line
2.6 MAIN TIME BASE
Modes repetitive
single
Deflection coefficient:
TB magnifier: OFF
steps 0,2 us/div...0,5 s/div In a 1-2-5 sequence of 20 steps
error limit 3% Measured over central 8 div
TB magnifier: x10
steps
20 ns/div...50 ms/div
In a 1-2-5 sequence of 20 steps
error limit +5 % Measured over central 8 div
VARiable gain range 2,5: 1 (minimum) Uncalibrated, continuously
variable between steps
Hold-off:
variable between 1...2x minimum hold-off
2.4 EXTERNAL INPUT