Instek GFG-8255A Function Generator   FEATURES:   Frequency Range：0.5Hz ~ 5MHz Waveforms：Sine, Triangle, Square, Ramp, TTL and  CMOS Output External Voltage Controlled Frequency (VCF) Function Duty Cycle Controlled with Signal Inversion Capability Variable DC Offset Control Two-Step (-20dB x 2) and Variable Attenuator Built-in 6 Digit Counter with INT./EXT. Function up to  150MHz / high resolution INT./EXT. AM/FM Modulation LIN/LOG Sweep Mode GCV Output for synchronization     Data Sheet   User Manual       SPECIFICATIONS       Main          Frequency Range 0.5Hz to 5 MHz (7 ranges)        Amplitude >10Vp-p (into 50Ω load)        Impedance 50Ω +10%        Attenuator -20dB+1dB x 2        DC Offset <-5V ~ >5V (into 50Ω load)        Duty Control 80% : 20% : 80% to  1MHz Continue variable        Display 6 digit LED display       Sine Wave          Distortion <1%, 0.5Hz ~ 100kHz        Flatness <0.3dB, below 500kHz； <1dB, below 5MHz       Triangle Wave          Linear >98%, 0.5Hz ~ 100kHz； >95%, 100kHz ~ 5MHz       Square Wave          Symmetry +2%, 1Hz ~ 100kHz        Rise or Fall Time < 50nS at maximum output (into 50Ω load)       CMOS Output          Level 4Vpp+1Vpp ~ 14.5Vpp+0.5Vpp adjustable        Rise or Fall Time <120nS       TTL Output          Level >3Vpp        Fan Out 20 TTL load        Rise/Fall Time <25nS       VCF          Input Voltage 0V~10V ±1V(100 : 1)        Input Impedance 10kΩ ±10%       GCV          Output Voltage To set the voltage between 0V ~ 2V as per different frequency       Sweep Operation          Sweep/Manual Switch selector        Sweep/Rate 100 : 1 ratio max. and adjustable        Sweep/Time 0.5sec. ~ 30sec. adjustable        Sweep/Mode Lin./Log. switch selector       Amplitude Modulation        Depth 0 ~ 100%        MOD. Frequency 400Hz (INT), DC ~ 1MHz(EXT)        Carrier BW 100Hz ~ 5MHz (-3dB)        EXT Sensitivity <10Vpp for 100% modulation       Frequency Modulation        Deviation 0 ~ + 5%        MOD. Frequency 400Hz(INT), DC ~ 20kHz(EXT.)        EXT. Sensitivity <10Vpp for 10% modulation       Frequency Counter          INT./EXT. Switch selector        Range 0.5Hz ~ 5MHz (5Hz ~ 150MHz EXT.)        Accuracy Timebase accuracy ±1 Count        Timebase ±20ppm (23°C±5°C) after 30 minutes warm up        Resolution The maximum resolution is 100nHz for 1Hz and 1Hz for 100MHz        Input Impedance 1MΩ//150pF        Sensitivity <35mVrms (5Hz ~ 100MHz)；< 45mVrms (100MHz ~ 150MHz)       Power Source AC 115V/230V±15%, 50/60Hz       Accessories Power cord × 1, Instruction manual × 1, GTL-101 × 2       Dimensions & Weight 251(W) × 91(H) × 291(D) mm, Approx. 2.4kg