|
1803D
Frequency Counter/Timer |
|
| Key Features |
 |
- Selectable gate times 0.1 sec and 1.0 sec
- 7 digit LED display
- High accuracy time display
- Compact bench top AC powered counter
|
B+K PRECISION counters provide versatility and reliability for a broad spectrum of laboratory and service applications. In addition to frequency measurement, most B+K PRECISION counters also provide period and totalise measurement capabilities.
COUNTER TERMS
FREQUENCY RATIO—Measurement of the frequency ratio of two different input signals as applied to two different input channels.
PERIOD—The time required for a single cycle of the input event to occur. Measured in seconds or fractions of a second and is the reciprocal of frequency. (i.e., Time = 1/Frequency).
PERIOD AVERAGING—Sampling a number of input periods and displaying the average of these sampled periods.
PRESCALER—A frequency divider circuit which extends the high frequency measurement capability of a counter.
SENSITIVITY—The lowest amplitude (strength) signal that the counter will count.
TCXO—Temperature Compensated Crystal Oscillator. The time base of the highest quality frequency counters is a TCXO, which provides high accuracy and stability.
TIME BASE ACCURACY—The accuracy of a counter is determined by the stability of its internal time base. Stability is measured in parts per million (ppm), while undergoing temperature and operating voltage variations.
TIME INTERVAL—Measurement of the time difference from the edge of one channel's input signal to the edge of another channels's input signal.
TOTALISE—Continuous counting of the number of events that have occurred since the counter was reset. |
