Input A Characteristics Frequency Range 0.1 Hz to 100 MHz (DC coupled) 30 Hz to 100 MHz (AC coupled) Sensitivity 30 mV rms Coupling AC or DC selectable. Impedance 1 MO resistance shunted by < 40 pF Attenuator x1 or x10 switch selectable Low Pass Filter -3 dB point at approx. 100 KHz, switch selectable Accuracy ± Time base error ± resolution (Table 1) Resolution and Number of Displayed Digits Time Base Selector INT EXT INT EXT INT EXT INT EXT Gate Time 0.01S 0.1S 1S 10S Number of Display Digits 5 6 6 7 7 8 8 9 Frequency (Input A) Resolution 0.1 Hz-0.99 Hz 10 µHz 1 µHz 1 µHz 0.1 µHz 0.1 µHz 10nHz 10nHz 1nHz 1 Hz-9.9 Hz 0.1mHz 10 µHz 10 µHz 1 µHz 1 µHz 0.1 µHz 0.1 µHz 10nHz 10 Hz-99 Hz 1 mHz 0.1mHz 0.1mHz 10 µHz 10 µHz 1 µHz 1 µHz 0.1 µHz 100 Hz-999 Hz 10mHz 1 mHz 1 mHz 0.1mHz 0.1mHz 10 µHz 10 µHz 1 µHz 1 KHz-9.9 KHz 0.1 Hz 10 mHz 10 mHz 1 mHz 1 mHz 0.1 Hz 0.1 mHz 10 µHz 10 KHz-99 KHz 1 Hz 0.1 Hz 0.1 Hz 10 mHz 10 mHz 1 mHz 1 mHz 0.1mHz 100 KHz-999 KHz 10 Hz 1 Hz 1 Hz 0.1 Hz 0.1 Hz 10 mHz 10 mHz 1 mHz 1 MHz-9.9 MHz 100 Hz 10 Hz 10 Hz 1 Hz 1 Hz 0.1 Hz 0.1 Hz 10 mHz 10 MHz-99 MHz 1 KHz 100 Hz 100 Hz 10 Hz 10 Hz 1 Hz 1 Hz 0.1 Hz 100MHz 10 KHz 1 KHz 1 KHz 100 Hz 100 Hz 10 Hz 10 Hz 1 Hz (Table 1) Max. Input Voltage Level Fig. 1 Max. Input Level (Input A) Fig. 1 Max. Input Level (Input A) Period Range 10 nS to 10 S Display n/µ/m (nano/micro/milli) Sec. with decimal point Total Range 10 Hz to 30 MHz Capacity 0 to 999 999 999, OVER FLOW: "OF" RPM Range 600 to 600 x 106 RPM, OVER FLOW: "OF" Input C Characteristics Frequency Range 80 MHz to 3.5 GHz Sensitivity 15mV from 80 MHz to 2000 MHz 20mV from 2000 MHz to 3.0 GHz 30mV from 3.0GHz to 3.2GHz 50mV from 3.2GHz to 3.5GHz Coupling AC only Impedance 50 O ±5% Max. Input Level 3 V rms sine wave Resolution and Number of Displayed Digits Time Base Selector INT EXT INT EXT INT EXT INT EXT Gate Time 0.01S 0.1S 1S 10S Number Of Displayed Digits 5 6 6 7 7 8 8 9 Frequency (Input C) Resolution 100 MHz-999 MHz 10 KHz 1 KHz 1 KHz 100 Hz 100 Hz 10 Hz 10 Hz 1 Hz 1 GHz-3.7 GHz 100 KHz 10 KHz 10 KHz 1 KHz 1 KHz 100 Hz 100 Hz 10 Hz (Table 2) Time Base Characteristics Type TCO (Temperature Controlled Oscillator) Frequency 10.000000 MHz Stability ±1 PPM (±1 count) Line Voltage Stability Less than ± 1 PPM with ± 10% line voltage variation Temperature Stability ±5 PPM from 0°C to 50°C Max. Aging Rate ±5 PPM/year Int. Std. Out Level Capacitance 10 MHz (Internal Standard Frequency Output) 1 V p-p or more. TTL (10TTL) 15pF Ext. Std. In Level Impedance 10 MHz (External Standard Frequency Input) 1.5Vrms to 5Vrms Approx. 600O Display Characteristics Display Nine Digit 0.56" LED with M (Mega) or K (Kilo) Hz; nano, micro, or milli (n/µ/m) Sec.; GT (GATE TIME); H (HOLD); and OF (OVERFLOW) indicators. FUNCTION and GATE TIME are user selected. OF display is shown when the count exceeds 999 999 999. Hold In the FREQUENCY, PERIOD, TOTAL, RPM modes, measurement in progress is stopped; and the last complete measurement is displayed. When HOLD is released, a new measurement begins. Gate Time Depending on input frequency < 10 mS --------- Somewhere between 0.9 and 9mS < 0.1 S ----------- Somewhere between 9 and 90mS < 1 S -------------- Somewhere between 90 and 900mS < 10 S ------------ Somewhere between 0.9 and 9S Note: Last measurement display will remain for 10 seconds after signal off. Dimensions and Weight Dimensions (WxHxD) 9.4 x 3.5 x 10.6" (240 x 90 x 270mm) Weight (Approx) 5.5lbs. (2.5 kg.) Equipment Ratings Power 115VAC±10%, 50-60 Hz, 9 W Plug and Socket 3 wire ac power plug and 3 wire outlet Fuse 500 mA/ 250V F type Operating Environment Temperature 0 °C to +40 °C (Accuracy Specified at 23 °C ± 5 °C) Humidity up to 85% RH (Relative Humidity) to 40 °C without temperature extremes causing condensation within the instrument. Storage Environment Temperature -20°C to +70°C Humidity below 85% RH Insulation Category II Portable equipment of local level. Pollution Degree 2 Protection to IEC 529 Ordinary Note: Specifications are subject to change without notice.