Custom Modifications, Repairs & Turnkey Solutions

Our core philosophy has always been to help the customer translate the analog world to reliable digital data. We specialize in the problems caused by taking a sequence of "snap shots" of a continuously flowing analog world. Problems like taking a sample of a point of infinite frequency or simply sampling an analog world that is moving faster than the highest practical sampling rate.

Warranty and Non-Warranty Repair

Much more often than not, we can bring a product back to operation from a disabled state. Unfortunately, electronic products have a lifetime. Nuances in the electronic component manufacturing, storage, and assembly can diminish the lifetime of a component. Sometimes we are lucky and a device will operate perfectly for 30 years or more. Other times a component will fail in its first few moments of use.

The process of repair whether it is in the first year after purchase, a warranty repair, or after, a non-warranty repair for a reasonable fee, starts the same way. Contact us for a RMA (Return Merchandise Authorization) number. We will ask for details about the failure symptoms and provide a cost and time estimate for the repair implementation. Don't just send failed product back to us without authorization. We need to have this conversation first so that the repair can be managed and tracked in the most efficient manner.

Standard Product Customization

In most cases determining the requirement of product customization requires a conversation with our engineering staff. We are always available and quite willing to have this conversation. For the new customer, the need for a product modification can be a complex question. The best way to simplify this process is to use our products first and then we can determine if something can be done to modify our products to closely conform to your individual requirements.

Our price list discusses part number construction in greater detail. The following is a table of the common product customization prefaced by the part number suffix.

• E — No Enclosure and no accessories.
  This is ideal for the OEM customer to include board level products as a subsystem in the customer's own application specific product.
• 200 — Disable Automatic DC offset compensation.
  The low pass filter portion of our products can output a non-zero DC bias that changes with temperature and time. To compensate for this we surround the low pass filter with a circuit that removes these changes continuously. The time constant of the compensator is extremely slow, greater than 90 seconds, but in applications where the cutoff frequency of the low pass filter is below 10Hz, this compensator can be the source of bias drift. Removing the compensator makes the factory set bias adjustment for the low pass filter static rather than dynamic.
• 50X — Modified DC offset bias (X = range code).
  AC coupling the input or applying an active high pass filter to the input will remove DC bias however, there are environments where this is insufficient. We can provide a modification that can be set to a constant bias as a component of the output signal.
• 60X — Modified AC couple time constant (X = constant code).
  This changes the corner frequency of the passive AC couple circuit within a limited range.
• 700-X — Modified input impedance (X = ohms).
  Most applications require our products to have a high input impedance. This can be lowered if required.
• 9XX(k) — Post filter Fc modification XX(k) = corner frequency.
  With the exception of the GSAF-10 our low pass filters all utilize switched capacitor technology which is controlled by a high speed clock. In standard products the post filter frequency is set to maximize the useful bandwidth of the low pass filter. When the required band width is in the lower 20% of the useful range, the filter clock can couple into the output signal appearing as "noise" that can be as high as 10mV. Since this is introduced after the programmable gain amplifier stage in most instances this noise is not a problem when compared to the full range 20V_pp output. In applications where it is a problem we can lower the cutoff frequency of the post filter and significantly attenuate the coupling effect.
• Cxx — Customer specific pre-programming.

New Product Development

If you have a requirement that goes beyond our catalog of solutions, let's have a discussion about a new design. Perhaps we can develop the concept, turn it into a product, and manufacture it for you.