The Hantek HT300B 300 MHz and HT500B 500 MHz passive
probes are high impedance probes with switchable attenuation
ratio (1:1 and 10:1). These are compatible with hantek digital
storage oscilloscopes or similar oscilloscopes with 1 Mohm
BNC input.
Table 3 - Physical & Environmental Characteristics
Characteristic
Value
Probe Body
Cable Length
Weight
95mm
1200mm
55g
Table 2 - Electrical Characteristics
Characteristic
Value
Attenuation Ratio
Input Capacitance
Compensation range
(when terminated
into 1 Mohm)
1:1 / 10:1
1:1 - 100pf
15pf - 40pf
Input Resistance
Maximum Input
Voltage
1:1 - 150V rms CAT II
1:1 - 1M
Ω
Temperature
Humidity
Altitude
The BNC connector of these probes has a
pin hole without a pin. This is as per the
design and does not indicate any damage
or fault in the probe.
BNC
Connector
Pin hole
without
a pin
These probes have been designed and calibrated for use
with instruments having an input impedance
of 1M Ω
paralleled by 20pF. However, these may be recalibrated for
use with instruments having an input capacitance of
15 to 40pF.
Adjusting Probes for Low-Frequency (LF) Compensation
The probe should be adjusted for LF compensation when it is
connected to an oscilloscope input for the first time. LF
compensation matches the probe cable capacitance to the
oscilloscope input capacitance. This matching assures good
amplitude accuracy from DC to the upper bandwidth limit
frequencies. A poorly compensated probe clearly influences
the overall system performance (probe and oscilloscope)
and introduces measurement errors resulting in inaccurate
readings and distorted waveforms.
To perform LF compensation:
1 Connect the probe to the oscilloscope’s front-panel
calibration output (a square wave label is usually seen near
this output).
2 Use the supplied adjustment tool to adjust the LF
compensation to an optimum square wave response as
shown in the figure below.
10:1 - 15pf
10:1 - 10M
Ω
Table 1 - Probe and its Supplied Accessories
ID Part
Quantity
For
HT500B
For
HT300B
Hook Tip
Ground Spring
Ground Lead
Adjustment Tool
Protective Cap
Channel
Identification rings
2
2
2
2
-
2
1
1
1
1
2 sets of each color with
two rings in each set
Undercompensated
Overcompensated
Optimum
10:1 - 300V rms CAT II
3,000 m (9,842 ft) (Operating)
12200 m (40,026 ft) (Non-operating)
Bandwidth
For
HT300B
1:1 - 6 MHz
10:1 -
35
0 MHz
For
HT500B
1:1 - 6 MHz
10:1 -
500
MHz
5% to 95% RH up to 30 °C (Operating)
5% to 65% RH above 30 °C up to 55 °C
-10 °C to +55 °C (Operating)
-40 °C to +70 °C (Non-operating)
Passive probe
2
2
