R&S HM8123 Specifications
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R&S HM8123 Universal Counter / Timer Features 9 Measurement Functions:
(Frequency, Periodic Time, Event Counter, Speed, Frequency Ratio, Time Interval, Pulse Width, Time Interval (average), Phase, Pulse Duty Factor, Burst Measurements), External Gate and Arming
- Input Characteristics (Input A, B):
- 0 MHz to 200 MHz frequency range
- Sensitivity 25 mVeff (Sine) DC up to 80 MHz, 80 mV (Pulse) 65 mVeff (Sine) 80 MHz to 200 MHz (Normal triggering) 50 mVeff (Sine) 20 Hz to 80 MHz (Automatic trigger)
- Input noise: type 100 µV
- 1 MΩ II 30 pF input impedance
- Trigger can be programmed via rotary controller or software
- Input characteristic (Input C):
- Frequency range from 100 MHz to 3 GHz
- Sensitivity 30 mVeff up to 1 GHz (type 20 mVeff) 100 mVeff to 3 GHz (type 80 mVeff)
- Input impedance 50 Ω nominal
- Input characteristic (External Gate):
- 5 kΩ input Impedance
- Max. input voltage ± 30 V
- High/Low level: > 2 V / < 0.5 V
- Min. Impulse duration 200ns
- Frequency measurement Input A, B, C:
- LSD: 00000125 x frequency / Measuring time
- Trigger ± 1 LSD
- Accuracy ± (Resolution/Frequency ± time base inaccuracy ± trigger error2) / measurement time)
- Periodic time measurement: 5 ns to 10000 s
- LSD: 00000125 x Period / Measuring time
- Trigger ± 1 LSD
- Event counter (manual/external control): Range: DC to 20 MHz
- Min. Pulse duration 25 ns
- LSD ± 1 Event
- LSD release
- Accuracy ± trigger/period ± (trigger error2)/measuring time)
- Gate Time: Range 1 ms to 65 s
- 1 ms trigger
- External gate time: min. 20 µs
- Time base: 400 MHz clock, 10 MHz quartz
- 0.5 ppm stability
- 9 digit resolution with 1 s measurement time.
- Standard: TCXO (temperature stability: ± 0.5 x 10-6)
- Optional: OCXO (temperature stability: ± 1 x 10-8)
- Intuitive operation with press of a button – each function can be directly selected
- Galvanically isolated USB/RS-232 dual i
