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- 53132A Agilent Frequency CounterCondition: UsedFrequency: 225 MHz
- 53181A Agilent Frequency CounterCondition: UsedFrequency: 225 MHz
- 5342A Agilent Frequency CounterCondition: UsedFrequency: 18 GHz
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- 5385A HP Frequency CounterCondition: UsedFrequency: 1 GHz
- 5386A HP Frequency CounterCondition: UsedFrequency: 3 GHz
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- 53150A Agilent Frequency CounterCondition: UsedFrequency: 20 GHz
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- 5316A HP Frequency CounterCondition: UsedFrequency: 100 MHz
- 5352B HP Frequency CounterCondition: UsedFrequency: 40 GHz
- 5345A HP Frequency CounterCondition: UsedFrequency: 26.5 GHz
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- 5315A HP Frequency CounterCondition: UsedFrequency: 100 MHz
- E1420B HP Frequency CounterCondition: UsedFrequency: 200 MHz
- 5370B HP Frequency CounterCondition: UsedFrequency: 100 MHz
- 5384A HP Frequency CounterCondition: UsedFrequency: 225 MHz
- 5315B Agilent Frequency CounterCondition: UsedFrequency: 100 MHz
- 5343A HP Frequency CounterCondition: UsedFrequency: 26.5 GHz
- 5340A HP Frequency CounterCondition: UsedFrequency: 18 GHz
- 5248M Agilent Frequency CounterCondition: UsedFrequency: 50 MHz