2.7GHz Frequency Counter

1. Measurement methods

(1) Frequency measurement

A channel

Range: 10Hz-10MHz (Direct count)

10MHz-100MHz (proportion count)

Direct count:1Hz 、10Hz、100Hz（your choice）

proportion count:10Hz 、100Hz、1000Hz（your choice）

Strobe time: 0.01s、0.1s、1s （your choice）

Accuracy: ±count value± base time error ×measured frequency

B channel

(2) Period Measurement

Input: A channel

Range: 10Hz-10MHz

Resolution: 10^-7s^{, 10 -8}s, 10 ^-9s (your choice)

Accuracy: ±count value± base time error ×measured frequency

(3) Accumulate Measurement

Input: A channel

Range: 10Hz-10MHz

Accuracy: ±1 count impulse

(4) Self-check

Monitor: 0-9 characters of 8 digital pipe repeatedly shows

2. Input characteristics

（1）A channel

Input sensitivity: (10MHz) range: 10Hz-8MHz 20mVrms

8MHz-10MHz 30mVrms

(100MHz) range: 10MHz-8MHz 20mVrms

80MHz-100MHz 30mVrms

Attenuation: ×1, ×20 fixed

Wave filtering: low pass, 100KHz、-3dB

Impedance: about 1 MΩ (<35PF) Max. Safety voltage: 250V (DC+AC RMS) (2)B channel Input sensitivity: 20mVrms Impedance: about 50 Ω Max. Safety voltage: 3V

3. Time base

Time base frequency: 10MHz

Short-term stability: ±3×10^-9/s

Long–term stability: ±2×10^-5/s

Temperature Coefficient: ±1×10^-5, 0⁰C-40⁰C

Line voltage: Each change ± 10%, the frequency variation ± 1 x 10^-7 correspond

Power supply voltage: AC220± 10% 50Hz

Start time: 20 minutes (<25⁰C)

Temperature: working temperature -5⁰C-50⁰C

Storage and transportation temperature:-40⁰C-60⁰C

Humidity： Working Humidity: 10-90% RH

Storage Humidity: 5-95% RH

Dimension: 230*200*75 mm

Weight: 2kg