The GB4000 uses a crystal controlled oscillator to create and maintain its core control frequency. From that it uses a Digital Signal Process and two RF Signal Generator chips to create the variable output frequencies. Because it used solid state, digital components to create is core operating frequency and to generate its output frequencies, the GB4000 does not need periodic calibration.
We do periodically get used/refurbished units into our sales office. If we have any used or refurbished units available you will find them on our online shopping system here: Refurbished-Items
The GB4000 comes with a two year warranty. If the unit stops working within the warranty period, we will repair or replace your unit. This Warranty covers parts and labor required to bring the unit to full working order. For warranty service call the number at the top of this site.
We normally respond within 2 business days. Most popular questions will appear on this page. Not all questions that are submitted will be published to this page. Questions that are published may be edited for clarity.
