The GFC-8000 Series performs virtually all of the counting measurements required in laboratories, in terms of both period and frequency. A bright red 8 digit LED display with an included overflow indicator provides a clear view. Both models feature a stable time base with a maximum resolution of 100nHz and 10nS at 1Hz for frequency and period measurement, respectively. Gate time can be configured for fast response (5 digits/10ms) or accuracy (7 digits/s) for more control. For high frequency needs, the GFC-8270H can operate at up to 2.7GHz. The GFC-8000 Series features easy operation with a simple front panel interface, suitable for both portable and bench-top use.
Features
※ Frequency and Period Measurement
※ High Resolution at Both High and Low Frequency
※ 0.01Hz~2.7GHz Frequency Range(GFC-8270H)
※ 0.01Hz~1.3GHz Frequency Range(GFC-8131H)
※ 10mV rms High Sensitivity
※ 100nHz Resolution for 1Hz Input
※ Variable Trigger Level Control
※ Microprocessor Controlled Intelligent Counter(only GFC-8270H)
Tech Specs:
| DISPLAY | |
| 8 digits with Hz, kHz, MHz, GHz, s, ms, μs, and overflow | |
| GATE TIME | |
| Variable from 10ms to 10s, or 1 period of input depending on whichever is greater | |
| ACCURACY | |
| ±(resolution ± timebase error) | |
| CHANNEL A | |
| Range | DC coupling: 0.01Hz ~ 120MHz AC coupling: 30Hz ~ 120MHz |
| Sensitivity | 10mV typical, 50mV maximum |
| Coupling | AC or DC, selectable |
| Filter | Low pass, selectable in or out for channel A (-3dB point, nominal 100kHz) |
| Impedance | 1MΩ // 40pF |
| Attenuator | 1/1 or 1/20dB |
| Trigger Level | -2.5VDC ~ +2.5VDC |
| Adjustment Resolution | For frequency measurement, the maximum resolution is 100nHz for 1Hz and 0.1Hz for 100MHz inputs respectively. For period measurement, the maximum resolution is 10ns for 1Hz input, and 0.1x10-15s for 100MHz inputs respectively. |
| Display Accuracy | 7 digits for 1 sec gate time 6 digits for 100ms gate time 5 digits for 10ms gate time |
| Period Range | 8ns ~ 100ns (at least 7 digits displayed per gate time) |
| CHANNEL B | |
| Range | 50MHz ~ 2.7GHz for GFC-8270H 50MHz ~ 1.3GHz for GFC-8131H |
| Sensitivity | <50mVrms (10mVrms typical) for GFC-8270H <40mVrms (10mVrms typical) for GFC-8131H |
| Coupling | AC only |
| TIME BASE | |
| Aging Rate | 1ppm per month |
| Temperature | 5ppm, 23°C + 5°C |
| Line Variation | 0.005ppm for + 10% variation |
| POWER SOURCE | |
| AC 100V/120V/220V/230V ±10%, 50/60Hz | |
| DIMENSIONS & WEIGHT | |
| 230(W) × 95(H) × 280(D) mm Approx. 2.2kg | |
