The Signalcrafters Model 90 is a high-level VLF (Very Low Frequency) signal source designed for operation in the frequency range of 0.100 kHz to 500 kHz (100 Hz to 500,000 Hz). It’s a versatile instrument primarily used for testing and maintenance of Power Line Carrier (PLC) systems but also applicable in other areas requiring stable and accurate VLF signals.
Features:
Specifications:
Applications:
Resources:
Features:
The Model 90 features a number of advanced capabilities, including:
- Direct synthesis for high accuracy and stability
- Microprocessor control for ease of use
- 0 to 2 watts (50 ohms)Â output power
- 9Â selectable sweep rates
- FSK with 0 to 999 ms delay
- 10Â memory registers
- Battery or AC operation
Specifications:
- Frequency Range: 0.100 kHz to 500 kHz (100 Hz to 500,000 Hz)
- Frequency Resolution: 1 Hz
- Frequency Accuracy: Typically 2 ppm, maximum 5 ppm
- Frequency Stability: 1 ppm
- Aging: 5 ppm max. for 10 years
- Output Power:
- Model 90: 0 to 2 Watts into a 50 Ohm load (some sources indicate 0.08W max for a version of Model 90)
- Model 90A: Up to 2 Watts into a 50 Ohm load
- Output Voltage:
- Model 90: Up to 10 Vrms into 50 Ohms (corresponding to 2 Watts)
- Model 90A: Up to 10 Vrms into 50 Ohms
- Output Current:
- Model 90: Up to 0.2 Arms into a short circuit (corresponding to 2 Watts)
- Model 90A: Up to 0.50 Arms into a short circuit
- Output Voltage Accuracy: 5%
- Spurious Output: -70 dB
- Harmonics: -55 dB
- Sweep: 9 operator-selectable sweep rates, single or repetitive
- Frequency Shift Keying (FSK):
- Shift Range: 0 Hz to 499.9 kHz
- Delay Range: 0 ms to 999 ms
- Delay Resolution: 1 ms
- Memory: 10 user-programmable memory registers for storing frequencies.
- Tuning: Optical encoder with selectable resolution (1 Hz, 100 Hz, 1 kHz) and rates (64 Hz, 6.4 kHz, 64 kHz/Turn).
- Connectors:
- RF Output: BNC female
- Sync I/O: BNC female (provides a TTL/CMOS compatible trigger output)
- Power:
- Battery: Internal rechargeable sealed lead-acid battery (approx. 6 hours operation at 2 Watts into 50 Ohms at 25°C)
- AC: 115/230 VAC ±10%, 50/60 Hz, 50 VA
- Operating Temperature: -10°C to 50°C
- Storage Temperature: -30°C to 85°C
- Size: Approximately 7.0″ H x 11.0″ W x 9.5″ D
- Weight: Approximately 17 lbs
Applications:
- Testing and calibrating VLF receivers
- Simulating VLF signals for antenna testing
- Performing electromagnetic interference (EMI) testing
- Generating signals for medical and scientific applications
Resources:
Manual ⇓
