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Hameg HM8123-X
3 GHz Universal Frequency Counter

  • Measurement range: DC to 3 GHz
  • Input A/B (BNC): DC to 200 MHz
  • Input C (SMA): 100 MHz to 3 GHz
  • Input impedance A/B: 50 Ω or 1 MΩ (switchable), sensitivity 25 mV
  • Input impedance C: 50 Ω, sensitivity 30 mV
  • 10-digit resolution (at 10 s gate time)
  • 9 measurement functions, external GATE and ARMING connectors (BNC)
  • External Ref.-Input/Output (10 MHz) via BNC-connector
  • OCXO (temperature stability: ±1.0 x 10-8)
  • RS-232/USB dual interface, IEEE-488 (GPIB) optional
  • Fanless design
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Hameg HM8123-X Shown
Product Information
Datasheet 594 KB
Manual 1.92 MB
PDF Help
Specifications
Input characteristics (Input A and B)
Connection BNC socket
Frequency range 0 to 200 MHz (DC-coupled)
10 Hz to 200 MHz (1 MΩ, AC-coupled)
500 kHz to 200 MHz (50 Ω, AC-coupled)
Input impedance 1 MΩ II 30 pF or 50 Ω (switchable)
Attenuation 1:1, 1:10, 1:100 (selectable)
Sensitivity (normal triggering) 0 to 80 MHz 25 mVrms (sine wave), 80 mVpp (pulse)
80 to 200 MHz 65mVrms (sine wave)
20 Hz to 80 MHz 50 mVrms (sine wave, auto trigger)
Max. input voltage Input 1 MΩ 250 V (DC + ACpeak)
from 0 to 440 Hz decreasing to 8 Vrms at 1 MHz
Input 50 Ω 5 Vrms
Minimum pulse duration <5 ns for single pulse
Input noise (typ.) 100 μV
Auto trigger (AC coupling) trigger point: 50 % of peak-to-peak value
Trigger slope Rising or falling
Filter 50 kHz low-pass filter (selectable)
Input characteristics (Input C)
Connection SMA socket
Frequency range 100 MHz to 3 GHz
Input sensitivity up to 1 GHz: 30 mVrms (typ. 20 mVrms)
1 to 3 GHz: 100 mVrms (typ. 80 mVrms)
Input impedance 50 Ω nominal
Max. input voltage 5 V (DC + ACpeak)
Frequency measurement (Inputs A, B, C)
Frequency range 0 to 200 MHz (3 GHz)
LSD: (1.25 x 10-8 s x frequency)/measurement
time
Resolution 1 LSD
Accuracy ±(resolution/frequency
±time inaccuracy
±trigger error2)/measurement time)
Period duration measurement
Range 5 ns to 10,000 s
LSD (1.25 x 10-8 s x period)/measurement time
Resolution 1 LSD
Accuracy ±resolution /period
±(trigger error2) /measurement time)
RPM measurement
NPR presetting 1 to 65,535 pulses per revolution
Gate time 330 ms fixed
LSD 7.5 x 10-8 x revolution speed
Resolution 1 LSD
Accuracy ±(trigger error 2)/0.33)
±time base error
Offset
Range Covers the entire measurement range
Resolution Same resolution as in normal measurement.
If the gate time is changed in the
offset mode, the offset resolution is the
reference value resolution or the current
reading resolution (whichever is less
precise).
Gate time
Range 1 ms to 65 s
Resolution 1 ms
External gate time min. 20 μs
Time base
Frequency 400 MHz clock rate; 10 MHz crystal
Temperature stability (0 to 50 °C) ±1.0 x 10-8
External Reference 10 MHz ±20 x 10 -6
Miscellaneous
Interface Dual-Interface USB/RS-232 (HO820),
IEEE-488 (GPIB) (optional)
Safety class Safety Class I (EN61010-1)
Display LCD display (83 x 21 mm)
Power supply 115/230 V ±10 %, 45 to 60 Hz, CAT II
Power consumption approx. 20 W
Ordering Information
Model Description Buy Online Price
HM8123-X Hameg HM8123-X 3 GHz Universal Frequency Counter Buy Now Sale $2,679.33
(Reg. $3,425.71)
Included Accessories
 
  • 1 - Line cord
  • 1 - Printed Operating manual
  • 1 - CD
Included
Options and Accessories
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