The FD-252 digital frequency counter is designed for application that require a high frequency range. For that purpose the instrument is equipped, in addition to the 20 Hz-160 MHz input, a second input for measurement up to 2.4 GHz with an impedance of 50 Ohms.
|FREQUENCY RANGE||20 Hz to 160 MHz (input A)|
100 MHz to 2.4 GHz (input B)
|INPUT IMPEDANCE||1 MΩ // 35 pF (input A)|
50 Ω (input B)
|MAXIMUM INPUT VOLTAGE||250 V AC to 100 kHz (input A)|
100 V DC or peak AC (50 Hz) RF + 18 dBm (input B)