Frequency Meters
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- 0.1 Hz – 2.5 ГHz
- Ч3-81 (inputs А, B, С) – range 0.1 Hz–2.5 GHz
- Ч3-81/1 (inputs А, B) – range 0.1 Hz–200 MHz
- Frequency measurement, frequency ratio
- Period, duration measurements 1 μs–10000 s
- Signal level 30 mV–10 V (eff.), pulse up to 30 V
- Crystal 5MHz: ±10-7 (12 months) ±7.5x10-9 (day)
- Frequency temperature drift: ±2.5x10-8 (+5...+40 °С)
- Number of periods being averaged: 1–104
- Time cursors 10-7–10-3 s
- RS-232
- 8 digit indicator (LED)
- Dimensions, weight: 80x220x300 mm, 3 kg
- Power: 220VAC, 20VА
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- 0.1 Hz - 1 GHz
- Ч3-84 accuracy 1x10-7 (12 months) operating temperature -10 °С...+50°С
- Ч3-84/1 accuracy 1x10-7 (12 months) operating temperature +5 °С...+40°С
- Ч3-84/2 accuracy 1x10-6 (12 months) operating temperature +5 °С...+40°С
- Frequency, period, duration measurement (1 μs–100 s)
- Signal level 20 mV– 2 V (eff.)
- Crystal 5 MHz (Ч3-84, Ч3-84/1): ±5x10-8 (30 days), ±10-7 (12 months)
- Thermocompensated crystal 5 MHz (Ч3-84/2): 2.5x10-6 (30 days), ±5x10-6 (12 months)
- Number of periods being averaged: 1–104
- Time cursors 10-7–10-3 s
- 8 digit indicator (LED)
- Dimensions, weight: 80x220x300 mm, 3 kg
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- 0.1 Hz – 2.5 ГHz
- Input B (sinewave signal) - range 100 - 2500 MHz
- In. А, С(sine, puls) - range 0.01- 200 MHz
- Count time: in. А, С – 1, 10, 102, 103, 104 ms
- In. B –(16•1), (16•10), (16•102), (16•103), (16•104) ms
- Number of in. signal aver. per. - 1, 10, 102, 103, 104
- Period of time marks – 10-7, 10-6, 10-5, 10-4, 10-3
- Pulse dur. meas., in. А, С - 1 μs-100 s
- On/off ratio, in. А, С – 1.000001- 999999999
- Frequency ratio in. chan.: А/С и С/А - 0.0001- 999999999
- B/С – 0.5 – 999999999
- Thermostable crystal oscillator
- Frequency ration – 5 MHz
- Accuracy - ± 5•10-8- in 30 days., ± 10-7- in 12 month
- 9 decimal positions
- Dimensions (НxBxL) - 285x106x345 mm
- Weight: - 4 kg
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