Input A - 0.01 Hz to 125 MHz Input B - 80 MHz to 3 GHz Input C - 1.8 GHz to 6 GHz Frequency, period, pulse width and totalize modes Reciprocal counting measurements Low pass filter, attenuator and trigger level control Large 10 digit LCD display with annunciators Rechargeable battery operation built-in, supplied with AC adapter/charger Low power consumption USB remote controlHigh measurement accuracy The TF960 uses a high quality temperature compensated internal frequency reference (TCXO) which has a low aging rate and is stable to within ±1ppm over the full temperature range. Its short warm-up time allows accurate measurements to be made even under portable battery powered conditions. An External Reference input is provided and changeover from the internal timebase is automatic when an external reference standard is connected. High resolution For frequency, period and frequency ratio functions the instrument uses a reciprocal counting technique to provide high resolution at all frequencies. Eight significant digits of answer are produced in a 1 second measurement time, nine digits in 10s and ten digits in 100s with a granularity of less than 2 counts in the least significant digit. Battery operation when needed The TF960 operates from internal rechargeable NiMH batteries which give typically 24 hours operating life. The universal AC charger supplied will recharge the batteries in less than 4 hours and can be used for continuous AC operation. The instruments can also be powered from a standard USB port.