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| PM6685 주파수 카운터 |
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상기 장비는 주파수 카운터로서 , 사용하기 쉬운 경제적인장비이며,
높은 정밀도에서의 측정으로 연구소 나 개발용으로 많이 쓰이고
있습니다.
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1. 주파수 A : 0.1 Hz to 160MHz
2. 주파수 B : 0.1 Hz to 16MHz
2. 주파수 C : 70 MHz to 1.3GHz(RF적용)
3. 주파수 분해능 : 7 Digit/s
4. 측정 모드 : 주파수A,B ,펄스폭, 주기 , 듀티사이클, 하강/상승
시간, RPM , 시간격
5. Warm Up Time : 30 분
6. Battery Operating Time : 2 시간
7. 외부기준 입력 : 10 MHz
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| Measurement Functions |
| Measurement Functions |
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Frequency, Burst Frequency, Period, Ratio f1/f2, Pulse Width, Duty Factor, Totalize A |
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| Frequency A, C |
| Input A: |
10 Hz to 300 MHz |
| Input C (Optional Input Pre-Scaler): |
PM9621: 70 MHz to 1.3 GHz |
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PM9624: 100 MHz to 3.0 GHz |
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PM9638: 300 MHz to 8.0 GHz |
| Resolution: |
10 digits/s measurement time |
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| Burst Frequency A |
| Frequency range: |
100 Hz to 80 MHz |
| PRF range: |
up to 1 MHz |
| Burst duration: |
0.5 μ to 1.5 s,min. 3 cycles in burst |
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| Burst Frequency C |
| Frequency range: |
100 MHz to 8GHz |
| PRF range: |
up to 1 MHz |
| Burst duration: |
0.5 μs to 1.5 s |
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| Period A |
| Range: |
3.3 ns to 100 ms |
| Resolution: |
10 digits/s measurement time |
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| Ratio A/E, C/A |
| Range: |
10-9 to 109 |
| Frequency range: |
Input A: 10 Hz to 300 MHz (prescaling factor 4) |
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Input E: 10 Hz to 80 MHz |
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Input C: See input C frequency range |
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| Pulse Width A |
| Range: |
6 ns to 10ms |
| Frequency range: |
50 Hz to 60 MHz |
| Voltage range: |
100 mV p-p to 70 V p-p |
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| Duty Factor A |
| Range: |
0 to 1 |
| Frequency range: |
50 Hz to 60 MHz |
| Voltage range: |
100 mV p-p to 70 V p-p |
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| Totalize A |
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Event Counting on A with manual start and stop |
| Range: |
0 to 1014 |
| Frequency Range: |
0 to 100 MHz |
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* N/A: Not discernible, neglectable versus 1°C temperature variation. * * After 14 days continuous operation * * * Calibration Adjustment Tolerance: Is the maximal tolerated deviation from the true 10MHz frequency after a calibration. When the reference frequency does not exceed the tolerance limits at the moment of calibration, an adjustment is not needed. * * * * Total uncertainty: Is the total possible deviation from the true 10MHz value under influence of frequency drift due to aging and ambient temperature variations versus the reference temperature. The operating temperature range and the calibration interval are part of this specification.
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| External Reference |
| Input D |
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The use of external reference is indicated on the front |
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panel display |
| Input Frequency: |
10 MHz |
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with optional reference multiplier PM 9697 |
| Voltage Range: |
200 mV rms to 10V rms |
| Impedance: |
Approximately 1 kΩ, ac coupled |
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| Input E |
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Used in ratio A/E and external arming / gating modes |
| Frequency Range: |
DC to 80 MHz |
| Pulse Width: |
6 ns minimum |
| Slew Rate: |
2V/μs minimum |
| Trigger Level: |
TTL level, 1.4 V nominal |
| Trigger Slope: |
Positive or Negative |
| Impedance: |
Approximately 2 kΩ, dc coupled |
| Damage Level: |
±25V peak |
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| Reference Output G |
| Frequency: |
10 MHz, Sine Wave |
| Output: |
>0.5 V rms into 50Ω load, >0.7 V rms into hi |
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impedance load, Ac coupled |
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| Options (Battery Unit PM 9623) |
| Battery Unit (Option PM 9623) |
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The PM 9623 is a rechargeable battery unit for mounting |
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inside the counter |
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| Battery Type |
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| Battery Capacity |
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at 25ºC |
| Standby Mode: |
Typically 20 hours with Oven Time Base |
| Operating Mode: |
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Typically 3 hours without options, 2.5 |
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hours with Oven Time Base, and 2 hours with Oven Time Base and Input C |
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| Recharge Time |
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Typically 8 hours in standby mode |
| Battery Protection: |
Overcharge and deep discharge protection |
| External DC: |
12V to 24V via socket on rear panel (16V |
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to 24V to charge internal battery) |
| Line Failure Protection: |
Counter automatically switches |
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to internal battery or external DC when the line voltage falls below 90V AC |
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| Temperature |
| Operating: |
0ºC to +40ºC |
| Storage: |
-40ºC to +50ºC |
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