Features:
- 0.004 Hz to 4 MHz Frequency Range in 7 overlapping decade ranges
- Trigger and Gate Modes
- 20 Volt Peak-to-Peak Output
- DC Offset with Calibrated Zero
- 1000:1 Lin/10,000:1 Log Sweep
Versatility
- Waveforms: Sine, triangle, square, TTL Pulse, and dc
Operational Modes
- Continuous: Generator runs continuously at selected frequency
- Triggered: Generator is quiescent until triggered by external signal or manual trigger, then generates one complete waveform cycle starting at 0° and at selected frequency.
- Gated: As triggered mode, except output continues for duration of gate signal. Last waveform started is completed.
- Sweep: Recurring low-to-high frequency oscillation. Range, rate and mode (linear or logarithmic) selectable.
- Sweep Stop: Frequency sweeps to high sweep limit. Used to set high frequency limit
Function Output (50Ω OUT)
- Sine, square, triangle selectable and variable to 20 Vp-p (10 Vp-p into 50Ω) HI output, and to 2 Vp-p (1 Vp-p into 50Ω) LO output. Both outputs varied with a 30 dB Vernier. Peak output current is 100 mA maximum (HI output).
- Source impedance is 50Ω
DC Offset and DC Output
- Waveform offset and dc output selectable and variable through HI and LO BNC outputs. DC output selectable by not selecting a waveform function. HI output is ±10V max (±5V into 50OHM) as offset or Vdc output. Signal-peak plus offset limited to ± 10V (±5V into 50Ω) as offset or Vdc output.
- Signal-peak plus offset limited to ± 10V (±5V into 50 Ω). LO output is ± 1V max (±0.5V into 50 Ω) as is signal-peak plus offset limit. DC offset plus waveform attenuated proportionately at LO (-20dB) output.
TTL Pulse Output
- TTL pulse (50% duty cycle) at generator frequency. Drives up to 20 TTL loads
GCV-Generator Controlled Voltage
- 0 TO 4V open circuit output from 600 Ω source impedance. Proportional to frequency of main generator. For use as a horizontal drive signal.
VCG-Voltage Controlled Generator With external 0 to ± 4V Signal:
- Linear Mode: Up to 1000:1 frequency change
- Log Mode: Up to 10,000:1 change. Upper and lower frequencies limited to maximum and minimum of selected range.
- Slew Rate: 2% of range per μs (linear), 0 to 100% of range in 20 ms (logarithmic)
- Linearity: ±0.5% thru X100K range, ±2% on X1M range
- Input Impedance: 2 k Ω
Trigger and Gate
- Input: TTL compatible levels
- Pulse Width: 50 ns minimum
- Repetition Rate: 4 MHz maximum
Sweep
- Main generator is frequency modulated by internal sweep generator. Main generator frequency repeatedly rises from frequency set by dial and range button to frequency set by sweep stop knob
- Sweep Mode: Linear (3 decades max) or logarithmic (4 decades max)
- Sweep Rate: 30 ms to 1 min (nominal) continuously adjustable
- Sweep Width: Up to 1:1000 (linear) or 1:10,000 (logarithmic) continuously adjustable
Sweep Output
- Ramp waveform output with 4V peak into open circuit. For use as a horizontal drive signal
- Source Impedance: 600 Ω
Frequency Precision
- Dial Accuracy: ± 5% of full scale
Time Symmetry: Square wave variation from 0.2 to 4.0 on dial
- To 100 kHz: <,±1%
- To 4 MHz: <,5%
Amplitude Precision
- Sine variation (referenced to 1 kHz) with frequency
- On all ranges through x100K: <,±0.2 dB
- To 4 MHz: <, ± 1.0 dB
Waveform Characteristics
Sine Distortion on Ranges:
- x 1K and x 10K: <,0.5%
- x 1, x 10, x 100 and x 100K: <,1%
- X1M: All harmonics 25 dB below fundamental
Triangle Linearity
- Greater than 99% to 200 kHz
Square Wave Rise and Fall Time
- At HI output, less than 50 ns for 10 Vp-p output into 50 Ω termination
General
Environment
- Specifications apply at 23° ± 5°C.
- Instrument will operate from 0°to 50°C ambient temperatures
- Dimensions: 28.6 cm (11 ¼ in.) wide, 8.9 cm (3 ½ in.) high, 26.7 cm (10 ½in.) deep
- Power: 90 to 128V or 198 to 256V (selectable), 48 to 66 Hz, less than 15 VA
The WaveTek 188 covers a wide 0.004 Hz to 4 MHz frequency span in seven overlapping ranges. Each multiplier setting gives a full 1000:1 frequency band. The 188 also has a 10,000:1 logarithmic frequency range.
Trigger and Gate
In triggered mode, your manual or external TTL signal initiates a single waveform cycle. Gated mode is similar except there is a burst of waveform cycles for the duration of the signal.
Sweep
In addition to trigger and gates modes, the Model 188 has a ramp generator to sweep its main generator. With sweep, the output frequency repeatedly sweeps up at the desired rate in a selected linear (3 decades) or logarithmic (4 decades) mode.
Output
High level output is a full 20 volts peak-to-peak from a 50 Ω termination with maximum peak current of 100 milliamperes. This high power output allows you to drive low impedance and capacitive loads without saturating or degenerating the waveform output. In addition to high level output the 188 has a low level (down 20 dB from the high level) output. The outputs can be varied a full 30 dB.
Voltage Controlled Generator
With the 188, you can externally modulate or sweep the generator frequency in each of its 1000:1 ranges with dc or ac signals. The 188 range is 10,000:1 in logarithmic mode. For example, you can sweep the entire 40 Hz to 40 kHz audio band without switching ranges.
DC Offset with Calibrated Zero
Convenient front panel dc offset control lets you easily raise or lower the output waveform with respect to normal signal ground. Turning the DC offset switch off balances the waveform at a calibrated zero offset.
TTL Pulse Output
The WaveTek 188 has am auxiliary TTL pulse output at generator frequency for synchronization or for digital applications.
Технические характеристики
| Manufacturer | WaveTek |
|---|---|
| Condition | Used |
| Frequency | 4 MHz |
