bap8guy | B&K 1856 1.3Ghz Frequency Counter @bap8guy | Uploaded April 2017 | Updated October 2024, 7 hours ago.
The B&K 1856 can measure (by spec) frequencies from 5Hz to 100Mhz on channel A, which has a 1 Meg ohm input impedance. It has a button to increase attenuation a factor of x10 as well as a Low Pass Filter button for channel A. The range selection for channel A is .01S, .1s, 1.0s and 10 seconds sample time.
Channel B has a 50 ohm input impedance and can measure frequency from 80 Mhz to 1.3Ghz. It has range selections of .032s, .32s, 3.2s, and 32 seconds sample time.
The unit can measure periods (counting microseconds per sample period) and can totalize pulses over a manual period, or through the use of a control gate input on the rear of the unit. The unit also has a 10Mhz check button, which tests internal counting circuits and readout display. There are 8 large 3/4" high, bright LEDs in the readout and numerous display indicators on the front panel. The internal clock is of the modern decently stable TCXO design, which must be accessed internally for calibration.
This unit is in excellent condition in looks and operation.
The B&K 1856 can measure (by spec) frequencies from 5Hz to 100Mhz on channel A, which has a 1 Meg ohm input impedance. It has a button to increase attenuation a factor of x10 as well as a Low Pass Filter button for channel A. The range selection for channel A is .01S, .1s, 1.0s and 10 seconds sample time.
Channel B has a 50 ohm input impedance and can measure frequency from 80 Mhz to 1.3Ghz. It has range selections of .032s, .32s, 3.2s, and 32 seconds sample time.
The unit can measure periods (counting microseconds per sample period) and can totalize pulses over a manual period, or through the use of a control gate input on the rear of the unit. The unit also has a 10Mhz check button, which tests internal counting circuits and readout display. There are 8 large 3/4" high, bright LEDs in the readout and numerous display indicators on the front panel. The internal clock is of the modern decently stable TCXO design, which must be accessed internally for calibration.
This unit is in excellent condition in looks and operation.
