The PS-525 test box contains a built-in altitude encoder reader for displaying Gray Code, and two separate, selectable RS232 inputs at speeds of 1200, 2400, 9600 baud. To select the disired reading code, the operator presses the "Select Code" button under the Decoder display, until the desired code is selected. Then the display will either read the signal, or display a message that the signal is not there. Gray code lines can be read independently by pressing the Select Code button to this function.
The connector pin-out on the front panel is identical to the pin-out of the popular ACK A-30 encoder. In fact, this encoder can be plugged directly into the connector if desired. Test cables can be built to extend the connector and test the encoder in the aircraft. In addition, adapter cables can be made to test all other encoders on the market. (Cables and adapters are not included in the sale of the box.)
The batteries internal to the PS-525 tester can power altitude encoders at either 12 or 24 volts. The desired voltage is selected by the toggle switch when the operator applies power to the test unit.
Encoder Reader:
The Encoder Reader is compatible with outputs of the following altitude encoders:
ACK (gray code, 1200, 2400, 9600 baud)
Shadin (gray code, 9600 baud)
Trans-Cal
Ameri-King (gray code)
The Encoder Reader is compatible with the following RS-232 protocols:
Garmin 1200, 9600 baud
Northstar 2400 baud
Shadin 9600 baud
UPS AT 1200 baud
Trimble 9600 baud
