LDC-823(S) is a digital frequency counter/timer designed to measure the frequency and period of a signal, featuring a wide frequency range (10Hz—250MHz), a high input sensitivity (20mV rms), and high resolution to 8 digits. The period function makes the unit outstanding for video tape recorder service applications. This instrument can be used for adjustment, test and repair of audio instruments, AM/FM radios, TVs, CB radios, computer clocks, amateur-radios, electronic watches, and . musical instruments, etc. The LDC-823(S) is small and portable. A big bright fluorescent display assures easy readability of values. The green display does not induce eye fatigue even after an extended period of viewing. Readout miscounts are reduced by zero-blanlang, unit-display (kHz, MHz, mS) and overrange display. The use of LSI and MSI in the internal circuit assures reliable performance and less. power consumption.