Chapter II
30 MHz oscilloscope
21
6.
TECHNICAL CHARACTERISTICS
The only guaranteed values are values to which tolerances or limits are assigned (after a half
hour warming up period). Values without tolerances are given for guidance.
6.1.
Vertical deviation
CH1 - CH2
Specifications
Comments
Bandwidth at - 3 dB
Bandwidth at - 6 dB
30 MHz
35 MHz
Rise time
< 11.7 ns
Vertical deviation
coefficients (sensitivity)
Ranges: 5 mV/div. to 20 V/div. ± 3%
12 positions, sequences 1-2-5
Variable vertical deviation
coefficients
Multiplication of the V/div range by 1 to
2.5 (reduction of the amplitude of the
displayed signal)
Calibrated position (control at left
stop)
Uncalibrated position: coupling
light flashes
Max input voltage.
Protection: ± 420 V
(DC + AC peak at 1 kHz)
Thickness of the
focussed trace
< 2 mm
Chopping frequency
(CHOP)
About 200 kHz
Input coupling
DC
: 0 to 30 MHz
AC
: 10 Hz to 30 MHz
GND : 0 V reference
Input impedance
1 M
Ω
± 1% // 25 pF
Response to rectangular
signals
Overrun < 3%
Aberration at 10 mV/div. :
•
constant value < 1 mm
•
before the edge < 2 mm
1 kHz to 1 MHz
1 MHz (Tm < 100 ps)
Crosstalk
5 mV/div. to 20 V/div. 36 dB typ.
Reference to 30 MHz same
sensitivity on CH1 and CH2,
6 div.
Display
CH1 mode:
CH1 only
CH2 mode:
CH2 only
ALT mode:
CH1 then CH2 alternating (0.5 ms to 50 ns/div.)
CHOP mode: CH1 and CH2 chopped (200 ms to 1 ms/div.)
ADD:
CH1+CH2 or CH1-CH2 (if -CH2 is selected)
XY mode:
CH1 in X and CH2 in Y
6.2.
Horizontal deviation (timebase CH1 and CH2)
CH1-CH2
Specifications
Comments
Sweep speed
Ranges 50 ns to 200 ms/div. ± 3%
21 sequence positions 1-2-5
Expansion x 10
Precision: ± 5%
Used to obtain 10 ns/div.
The x 10 key is disabled at
50 ns/div.
XY mode
X channel in CH1
DC coupling: 0 Hz to 2 MHz
AC coupling: 10 Hz to 2 MHz
Y channel in CH2
DC coupling: 0 Hz to 30 MHz
AC coupling: 10 Hz to 30 MHz
Phase shift < 3° at 120 kHz