GPS Systems require altitude data to perform certain correction, including missing satellite information. Also, to maintain 3-D accuracy, GPS units cannot receive gray code output which was standard on old encoders. They are designed to accept serial data. Thus, a device wad required to convert 10-wire gray code data from the altitude encoder to an acceptable serial format. (That is, until Shadin Avionics designed the fine Altitude Encoder 8800X with built-in serial port! See Falcon Altitude Encoder for more details.
The Shadin Avionics serializer line of products take 10 wire gray code from your existing Mode C encoder and converts that into an RS-232 format. The converter also has the capability of driving 2 independent altitude devices: at the same time your GPS/Loran, and the Shadin Avionics AMS-2000!
The high resolution gray code converters are a family of Shadin Avionics products which take gray code and pressure sensor inputs and output serial data. They are referred to as 9200 series products.
They are referred to as \"high resolution\" because they use their pressure sensor inputs to get a better resolution than the gray code\'s 100 foot increments. They are not calibrated as a part of the manufacturing process. Instead, the gray code inputs provide automatic
calibration during use, and the high resolution altitude is obtained by interpolating the sensor input between the gray code increment/decrement points.
9200 Size (High): 4.3\"L x 2.5\"W x 1.5\"H
Weight: 4 oz.
Altitude Range: -1000 to 62,000 feet
Operating Temperature: -20°C to +55°C
Input Power: +10 to +30 VDC, 50 mA
Input: 10 wire (gray code) from Mode C Static Pressure