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GFG-8255A
5 MHz Function Generator, LED
This is a stable low distortion instrument, which generates signals in the frequency range up to 5MHz. Typical applications include a wide range of audio response testing applications, vibration testing, servo system evaluation, ultra sound applications, and etc. This instrument includes the following features: logarithmic and linear sweep capabilities, together with a built in frequency counter. The sweep capability simplifies the task of finding resonant points of speakers, filter networks and other networks/structures. An oscilloscope may be connected to this instrument for the response to be displayed. The counter can be switched to measure and display the frequency of an external signal up to 150MHz.
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
Specifications
| Main |
| Frequency Range |
0.5Hz to 5MHz (7 ranges) |
| Amplitude |
>10Vp-p (into 50 Ohms load) |
| Impedance |
50 Ohms ±10% |
| Attenuator |
-20dB ±1dB x 2 |
| DC Offset |
<-5V ~ > 5V (into 50 Ohms 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 50 Ohms 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 |
10k Ohms ±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 |
1M Ohms//150pF |
| Sensitivity |
< 35m Vrms (5Hz ~ 100MHz);
< 45m Vrms (100MHz ~ 150MHz) |
| Power Source |
| AC 115V/230V ±15%, 50/60Hz |
| Accessories |
| Power cord × 1, Instruction manual × 1,GTL-101 × 2 |
| Dimensions and Weight |
| 251(W) × 91(H) × 291(D) mm, Approx. 2.4kg |
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