Elgar 401SD Programmable AC Source

The Elgar 401SD-001 is a single-phase AC power source component, specifically an oscillator module, designed to provide programmable frequency and voltage control for compatible Elgar AC power supplies. It functions as a plug-in unit that interfaces with Elgar power amplifier systems to generate precise AC power output. This module is characterized by its user-adjustable frequency settings via decade switches and its integration with a power source’s gain control for amplitude adjustment.

### Technical Specifications

* **Module Type:** Plug-in Oscillator Module
* **Compatibility:** Designed for Elgar AC Power Sources (e.g., 400SD/SP series, 1001B)
* **Frequency Control:**
* Manual control via four decade switches on the front panel.
* Frequency range switch (X1, X10, X100).
* Frequency resolution of 1 part in 10,000.
* Frequency limits: Outputs zero if frequency is below 44 Hz or above 5100 Hz.
* **Frequency Output Range:**
* Typically 45 Hz to 5100 Hz, depending on the specific configuration and associated power source limitations.
* **Amplitude Control:**
* Output amplitude is uncalibrated and adjusted via the gain potentiometer on the associated power source.
* Can be externally programmed for amplitude control:
* **Resistance Programming:** Varying output amplitude by changing an external resistor connected between pins 7 and 8 of connector J1. The value is 100 ohms per volt for a 130V output range.
* **Voltage Programming:** Output controlled by a positive input voltage applied to Pin 6 with common to Pin 1 of J1. The gain knob on the power source is removed and replaced with a shaft lock for full-scale adjustment.
* **Output Signal Amplitude (Oscillator):** Approximately 2V RMS.
* **Harmonic Distortion:** Not specified in available data.
* **Frequency Accuracy:** Not specified in available data.
* **Temperature Coefficient:** Not specified in available data.
* **Tandem Operation:** Equipped for tandem operation with other Elgar power sources. Pins 9 and 14 of the oscillator are connected together for this purpose.
* **Physical Mounting:** Plugs into the front panel of the Elgar power source and is secured by two captive screws.
* **Weight:** 55 lbs (for the Elgar 1001B power supply unit, likely including an oscillator).

### Interfaces

* **Front Panel:** Decade switches for frequency selection, range switch, frequency limit LED.
* **Rear Panel (J1 Connector):**
* Pins 7 and 8 for external resistance programming.
* Pin 6 for voltage programming input.
* Pin 1 for common reference in voltage programming.
* Pins 9 and 14 for tandem operation.

### Compatibility

The Elgar 401SD-001 is designed as a plug-in module for Elgar AC power sources. It is compatible with various models within the Elgar 400SD/SP series and is mentioned in conjunction with the Elgar 1001B power supply. Options such as -001, -002, -003, and -004 appended to the model number are noted to have no impact on the oscillator itself but serve for general clarification of power amplifier and oscillator combinations.

### Operation

The 400SD oscillator plugs into the front panel of an Elgar power source. The desired frequency is set using the decade switches and the range switch. The output amplitude is then adjusted using the gain potentiometer on the front panel of the associated power source. If the selected frequency is outside the operational limits (below 44 Hz or above 5100 Hz), the frequency limit LED will illuminate, and the oscillator output will drop to zero.

### Why Choose Aumictech for the Elgar 401SD-001?

At Aumictech, we specialize in supplying high-end AC power source components. Whether you need a precise frequency oscillator for a legacy test system, reliable integration with your existing Elgar power amplifier, or a component to ensure consistent AC power simulation, our team ensures the Elgar 401SD-001 delivers maximum performance for your application.