Agilent Technologies 22D Manuel d'utilisateur Page 6

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6
Active Probes
Agilent 1144A active probe
The 1144A features 800 MHz
bandwidth, 1 M input resist-
ance, 2 pF input capacitance, 10:1
attenuation and ±40 Vdc + peak
ac maximum input voltage. An
FET at the input allows a high
input resistance and low input
capacitance which minimizes the
loading of the circuit under test.
The output impedance of the
probe is 50 which allows the
probe cable to be extended with
a 50 coaxial cable. To use this
probe with 54640-Series oscillo-
scope, the 1142A power supply
is required. The 01144-61604
adapter can be used with the
power supply to provide power
for two channels of active probing.
Specifications for 1144A
Active Probe
Bandwidth 800 MHz
Risetime 440 ps
(Calculated)
Attenuation Ratio 10:1, ±2%
Input Resistance 1 M, ±5%
Maximum Input ±40 Vdc + peak ac
Voltage
Agilent 1145A 2-channel active probe
The two-channel 1145A low-mass
active probe has a probe tip that
weighs less than 1 gram making
it ideal for attaching to find pitch
ICs and probing surface mount
components. The probe combines
high bandwidth (750 MHz), low
input capacitance (2 pF) and high
input resistance (1 M). A versa-
tile set of accessories are provided
and when used in conjunction
with the Wedge adapter, the
1145A provides a hands-free
solution for probing 0.5 mm and
0.65 mm IC packages. To use this
probe with 54640-Series oscillo-
scope, the 1142A power supply
is required.
Specifications for 1145A
Active Probe
Bandwidth 750 MHz
Risetime 470 ps
(Calculated)
Attenuation Ratio 10:1, ±3%
Input Resistance 1 M, ±2%
Maximum Input ±40 Vdc + peak ac
Voltage
Ordering Information for Agilent
Technologies Active Probes
1144A 800 MHz active probe
1145A 2-channel 750 MHz
active probe
1142A Power supply for
1144A and 1145A
01144-61604 Splitter cable assy
1144A Active Probe 1145A Active Probe
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