Reference
CMC251 User Manual
17
3. Control the TOTAL mode by applying a TTL logic signal to the
external input connector as folows:
H
Apply a low level (0 volts) to stop the count (same as the HOLD
button)
H
Apply a TTL logic high level (+5 V) to resume the count (same
as releasing the HOLD button)
Checking Instrument Operation
At any time, you can verify the accuracy of the CMC251 Frequency
Counter by using the CHECK function. Press the FUNC button until
CHECK is indicated by the lighted LED. The readout will display
10.000 MHz.
Summary of Contents for CMC251
Page 1: ...User Manual CMC251 1 3 GHz Frequency Counter 070 8527 03...
Page 4: ......
Page 10: ...General Safety Summary vi CMC251 User Manual...
Page 18: ...Getting Started 8 CMC251 User Manual...
Page 28: ...Reference 18 CMC251 User Manual...
Page 34: ...Appendix A Specifications 24 CMC251 User Manual...