Fast Response

We Respond in 24 hrs

Friendly & Reliable

Pre Sales & Post Sales Support

Leading Provider

Of Scientific Research Equipment

Fast Response

We Respond in 24 hrs

Friendly & Reliable

Pre Sales & Post Sales Support

Leading Provider

Of Scientific Research Equipment

Signal Recovery Model 197 Precision Light Chopper

Description

The model 197 is a compact, high performance chopper, offering features and benefits that are ideal for use in modern photometric systems.

The unit is self contained, comprising a dual aperture chopper blade, motor and the necessary driving electronics. Each aperture provides an independent reference output allowing simultaneous dual frequency operation (10:1 ratio) for dual-path experiments. Frequency control is by a precision internal oscillator set by a 4-digit push-button selector on the unit or by the application of an external AC reference signal. The unit is powered via an external line power supply module.

Mounting holes are provided in the base and right-hand side of the housing (viewed from the front) to allow for mounting the model 197 onto an optical bench or support post.

Quartz Crystal Frequency Accuracy and Stability
The model 197, in common with all SIGNAL RECOVERY light choppers, uses a quartz crystal oscillator as its primary frequency standard. The oscillator signal is divided down to yield the required chopper frequency, and then the motor speed is continuously adjusted to phase lock the actual chopper frequency to this required value. The result is a chopper with an output frequency as stable as any other modern frequency source.

External Frequency Control
Like many other choppers, the frequency can be controlled externally. However, unlike other units the control is via an applied TTL reference rather than an analog voltage. This means that the modulation frequency generated is exactly that required which allows these choppers to be used in conjunction with the dual reference modes offered by our model 7124, 7265, 7270, and 7280 lock-in amplifiers to implement twochannel source compensation experiments.

Get in touch

If you have any questions about the services we provide simply use the form below. We try and respond to all queries and comments within 24 hours

or call (+65 9628 7255)

Your Name (required)

Your Email (required)

Your Phone Number

Company Name

Subject Let us know your topic of interest

Your Message

Reviews

There are no reviews yet.

Be the first to review “Signal Recovery Model 197 Precision Light Chopper”

Your email address will not be published. Required fields are marked *

Top