174
3.5. INFORMATION
CONCERNING
ACCESSORIES
3.5.1. Attenuator
probe
set
delivered with the instrument
This
lOx attenuator
probe is designed for real time oscilloscopes up
to 250
MHz, having
a
BNC input jack
and
13
pF
±
3
pF input capacitance paralleled
by
1 MiJ.
The
PM
8935L
is
a
similar probe with
a
cable length
of
2,5
metres.
3.5. 1.1. Specifications
Electrical
Attenuation
Input resistance
d.c.
a.c.
Input capacitance d.c. and
l.f.
Input resistance h.f.
Bandwidth
Max. input voltage
Check
zero
button on
probe shell
Environmental
Probe operates within specifications over the following ranges:
Temperature
—25
°C to
+70
°C
Altitude
Up
to 5000
metres
(15000
feet)
Other environmental
data
Same as
for the oscilloscope the probe is used with
Mechanical
Dimensions
Probe
body
103 mm x 10 mm dia (max.)
Clable
length 1
500
mm or
2500
mm
Correction box
55x30x15 mm incl.
BNC
Mass
Incl. standard accessories
125
g.
lOx
±
2
%
(Oscilloscope input 1 Mf2
±
1
%)
10
MJ2
±
2
%
(Oscilloscope
input 1
MJ2
±
5
%)
See
curve
Fig.
3.33.
1
1
pF
±
1
pF
(Oscilloscope
input
1
Mf2
±
5
%
paralleled by
13pF±3pF)
See
curve
Fig. 3.33.
Probe has
negligible
effect on oscilloscope
bandwidth
500
V
d.c.
+
a.c.
peak,
derating
with frequency. See
Fig.
3.34.
Oscilloscope input 1
MJ2
and voltage applied between probe tip and
earthed part of probe body. Test voltage 1500
V(j.c.
during
1 s, at
a
temperature between 1
5
and
25
°C, a rel. hum.
of
80 % at
maximum and
at
sea
level.
Same function
as
0
position of input coupling switch on oscilloscope
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