when the customer needs to use the high power type cell phone jammer

And when the customer needs to use the high power type  cell phone jammer
Pass delay chain parallel input (CK input of the D flip-flop) are parallel, then together, to accept the order with a stop signal as a clock signal of the flip-flop flip-flop Q output parallel encoding circuit connected to the input port of the signal transmission time required for a logic buffer gate with its input before a connection path is a delay caused by the unit delay time T d 18 Figure 4.2 pass delay insertion method circuit the basic units and structures in the test part-time at the same time, the serial input of the start pulse signal input to the first delay element, because the signal through the gate and wiring takes time. Fixed-style receivers of  cell phone jammer are suitable to be placed in some settled location in classrooms.
This signal will in turn transmit a logic buffer gate, the output of the buffer gate delay time of a few intervals, in order to change its output state when the stop signal the advent of the D flip-flop record to this point until the number of state of the logic buffer gate change, and then encoded circuit state change of the number of delay units into a digital signal output, Figure (4.3) as the basic transfer timing diagram of the delay circuit then DUT part time immediately can obtain the resulting digital transfer multiplied by a delay unit time: T-ab = (m + f) The x T d (4.2) where T ab. a test for any part-time (T a or T b), f delay time to less than one style. The microphones of  cell phone jammer adopt the ID code encrypted transmission technology.
Can not directly determine the quantity of time, 0 <f <1, also known as quantization error, m, compared to change the status of the number of delay units, so the delay time of delay units is this delivery delay chain can be resolved minimum time (4.2), to calculate the time, and must require the delay time of each delay unit are identical, but in fact this is not possible, the smaller the difference of the delay time of each delay unit, is made of the linear interpolator, the better, the smaller the measurement error of the basic structure of the circuit structure 19 Figure 4.3 to pass the time delay method timing timing diagram 4.2 time-digital converter 4.2.1 Time-digital converter in accordance with this chapter the basic principles of the beginning of the interpolation method timing.
Which includes a period of time delay in the connecting wire between the two delay units, special needs careful arrangements for the location of the delay unit connecting wire, so that the delay time difference of the delay unit to minimize, to reduce measurement errors, so very suitable for the use of reusable complex programmable logic devices. 4.2.3 Time Division calibration circuit T-segmentation and calibration circuit for laser time of flight is divided into a 4.5 T a, b and T cg , but also to measure the zero error and calibration standard time. the circuit schematic as follows: Figure 4.5 split with DCAL, ZERO, state, END, and the CLK signal meaning and calibration circuit schematic diagram in Figure 4.4. The button of  cell phone jammer  can be pressed easily to remotely control the turning over of the documents like PPTs.