EG&G 5207 Lock-In Amplifier

The EG&G 5207 is a precision single-phase lock-in amplifier designed for extracting small AC signals from noisy environments. It offers comprehensive programmability via integral RS232C and IEEE-488 interfaces, allowing for remote control of critical parameters such as sensitivity, averaging time constant, phase, operating frequency, offset, and dynamic reserve. The instrument features both digital and analog displays for versatile data presentation and trend monitoring. Its design accommodates plug-in cards to achieve a wide operating frequency range, making it suitable for various scientific and engineering applications, including research and development, and quality control.

### Technical Specifications

**Signal Processing and Measurement:**

* **Type:** Single-Phase Lock-in Amplifier
* **Measurement Capability:** Detects and measures very small AC signals in the presence of significant noise and interference.
* **Output Modes:** Voltage (V, mV, µV), dB, degrees, ratios.
* **Auto Functions:** Auto-normalize, auto-ranging, auto-offset, auto-phasing, auto-ratio.
* **Harmonic Sensitivity:** Sine-wave response at higher operating frequencies without degrading dynamic reserve or DC output stability.
* **Dynamic Reserve:** Multiple levels selectable, with a maximum total reserve of 96 dB. Input low-pass filters (LF, AF, BB) can provide up to 36 dB additional dynamic reserve.
* **Overload Indicators:** Signal pre-mixer channel and output.
* **Time Constant:** Averaging time constant is programmable.
* **Phase Resolution:** 0.025° vernier resolution for phase settings.
* **Common-Mode Rejection Ratio (CMRR):** 120 dB maximum from 60 Hz to 1 kHz, with a 6 dB/octave rolloff above 1 kHz.

**Electrical Characteristics:**

* **Full-Scale Sensitivity:** 1 µV to 5 V rms. With x10 output expansion, the maximum full-scale sensitivity can be increased to 100 nV.
* **Input Impedance:**
* AC coupled: 100 MΩ shunted by 40 pF.
* Reference Channel Input Impedance: 10 MΩ shunted by 30 pF.
* **Gain Stability:** ±200 ppm/°C; ±200 ppm/24 hours.
* **Frequency Stability (Internal Oscillator):** Typically 1500 ppm/°C above 10 Hz.
* **Auxiliary Power Output:** ±15 V, 50 mA for remote or plug-in preamplifier.

**Interfaces and Control:**

* **Computer Control:** Integral RS232C and IEEE-488 interfaces for total programmability.
* **Controllable Functions:** Sensitivity, averaging time constant, phase, operating frequency, offset, dynamic reserve, display mode.
* **Digital Display:** Four-digit display for measurement results and operating parameters.
* **Analog Display:** Analog meter for trend following.

**Frequency Range:**

* **Standard:** 5 Hz to 200 kHz.
* **Optional:** 0.5 Hz minimum frequency.
* **Bandwidth Options:** Determined by plug-in cards:
* Broadband (Model 5207/97)
* Audio Frequency (Model 5207/98)
* Low Frequency (Model 5207/99)
* **Internal Oscillator Frequency Range (Option 5207/94):** 0.1 Hz to 100 kHz.

**I.F. Filter Options:**

* **Standard IF (/92):** Standard I.F. 2-6 characteristic.
* **Dual Band IF (/93):**
* **Crystal-Het™ Filter (Optional):** Provides a 100 Hz bandwidth at 1 MHz (Q = 10000).

**Physical Characteristics:**

* **Dimensions:** 17-1/2″ W x 22″ D x 5-1/4″ H (44.5 x 55.9 x 13.3 cm).
* **Weight:** 25 lb (11.3 kg).
* **Operating Temperature Range:** 10°C to 40°C.
* **Power Requirements:** 95-130 V ac, 60 Hz; 190-260 V ac, 50 Hz; 60 watts.

**Compatibility and Options:**

* **Input Modes:** Single-ended (A), or differential (A-B).
* **Preamplifier Options:** Models 181 and 5002 (current-input preamplifiers) are available.
* **Notch Filter Option:** Model 5015 (50 Hz or 60 Hz).
* **Internal Oscillator Option:** Model 5207/94.
* **Signal Card Options:** /97 (Broadband), /98 (Audio Frequency), /99 (Low Frequency).
* **IF Options:** /92 (Standard IF), /93 (Dual Band IF).

Why Choose Aumictech for EG&G 5207?
At Aumictech, we specialize in supplying high-end signal processing equipment. Whether you need precise signal analysis, robust noise reduction, or automated measurement capabilities, our team ensures the EG&G 5207 delivers maximum performance for your application.