Overview
The manual covers the operation, testing, and maintenance of the Wavetek Model 135 Sweep Generator. This device is a precision source for generating sine, square, triangle, and sawtooth waveforms with a frequency range from 0.2 Hz to 2 MHz. It offers features such as frequency control by external voltage, operation as a triggered or gated CW generator, and selectable frequency sweep modes (linear or logarithmic). The manual includes sections on specifications, operation, circuit description, maintenance, and a data package.
Specifications
- Waveforms: Sine, square, triangle, and sweep
- Dynamic Frequency Range: 0.2 Hz to 2 MHz
- Ranges:
- X10 0.2 Hz to 20 Hz
- X100 2 Hz to 200 Hz
- X1K 20 Hz to 2 kHz
- X10K 200 Hz to 20 kHz
- X100K 2 kHz to 200 kHz
- X1M 20 kHz to 2 MHz
- Outputs: Sine, square, triangle, and sweep, selectable; amplitude variable over 40 dB, 50 ohm output impedance (600 ohm available); 20 V p-p into open circuit and 10 V p-p into 50 ohm load from 50 ohm source impedance; short circuit current is ±100 milliamperes
- GCV Output: Zero to 5 V (max) proportional to the frequency of the main generator. Output impedance 600 ohm
- Sync Output: Greater than 1 V p-p square wave into open circuit at 600 ohm output impedance
- DC Offset: ±5 V offset (±2.5 V offset into 50 ohm load) controlled from rear panel; peak amplitude limited by the dynamic range of the output amplifier
- VCG — Voltage Controlled Generator: Frequency of generator may be dc-programmed or ac-modulated by external 0 to ±5 V signal. Voltage control circuitry is capable of 1000:1 frequency variation without changing the range multiplier. The VCG amplifier has a 100 kHz bandwidth in the linear sweep mode only and a slew rate of 0.1 V/s. The instantaneous frequency is the result of the sum of the dial setting and the externally applied voltage
- Stability:
- Short term ±0.05% for 10 minutes
- Long term ±0.25% for 24 hours
- Percentages apply to amplitude, frequency, and dc offset
- Sweep Time: 10 µs to 100 s
- Sweep Width: Up to 1000:1 with front panel control
- Dial Accuracy: For LIN FREQ, ±2% of full scale, 1 Hz to 2 MHz
- Electronic Frequency Vernier: For LIN FREQ, one turn for approximately 1% control of full scale
- Time Symmetry: ±1% through X100K range
- Sine Wave Frequency Response: Amplitude change with frequency less than:
- 0.1 dB from 0.2 Hz to 200 kHz
- 0.5 dB from 0.2 Hz to 2 MHz
- Sine Wave Distortion: Less than:
- 0.5% on X10, X100, X1K, X10K ranges
- 1.0% on X100K range
- 2.0% on X1M range
- Square Wave Rise and Fall Time: Less than 50 ns
- Temperature: All specifications listed, except stability, are for 25°C ±5°C. For operation from 0°C to 55°C, derate all specifications by factor of 2
- Dimensions: 8-½ inches wide, 5-¼ inches high, 11-¼ inches deep
- Weight: 9 lb net, 13 lb shipping
- Power: 105 V to 125 V or 200 V to 250 V, 50 Hz to 400 Hz. Less than 25 watts
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download SCHEMATICS Manual (PDF – 2.1 MB)
Wavetek Model 135 Lin-Log Sweep Generator Manual: Provides schematics for troubleshooting and calibrating the device. File size: 2.1 MB.
- Brand: Wavetek-model-135-lin-log-sweep-generator-instruction-manual
- Model: SCHEMATICS
- Type: Manual
- File size: 2.1 MB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download SCHEMATICS manual (PDF)
Wavetek Model 135 Lin/Log Sweep Generator Overview
The Wavetek Model 135 Lin/Log Sweep Generator is a precision electronic test instrument designed for generating linear and logarithmic frequency sweeps. It is widely used in signal testing, frequency response analysis, and calibration of audio and RF equipment. This device enables engineers and technicians to perform accurate frequency sweeps across a broad range, facilitating detailed analysis of circuit behavior and system performance.
Main Features and Specifications
- Frequency sweep range: 10 Hz to 1 MHz
- Selectable linear or logarithmic sweep modes
- Sweep time adjustable from 0.1 seconds to 100 seconds
- Output amplitude adjustable up to 10 V peak-to-peak
- High stability and low distortion output signal
- Compact and rugged design suitable for laboratory and field use
- Front panel controls for sweep rate, start/stop frequency, and output level
Basic Usage and Operation Tips
To operate the Wavetek Model 135, first select the desired sweep mode (linear or logarithmic) using the front panel switch. Set the start and stop frequencies within the device’s range, then adjust the sweep time to control how quickly the frequency changes. Connect the output to the device under test, ensuring proper impedance matching. Always begin with a low output amplitude and gradually increase to the required level to avoid damaging sensitive equipment.
Troubleshooting and Maintenance
If the output signal is unstable or distorted, verify all cable connections and ensure the device is properly grounded. Check the calibration periodically using a known reference signal. Clean the front panel controls and connectors regularly to maintain reliable operation. In case of persistent issues, consult the schematic diagrams provided in the manual for detailed circuit troubleshooting.
Safety Reminder
Always operate the Wavetek Model 135 in a dry, well-ventilated environment. Avoid exposing the device to excessive moisture or extreme temperatures. Disconnect the unit from power before performing any maintenance or internal inspection. Follow all standard electrical safety procedures to prevent shock or damage to the equipment.