Advanced Signal SIGNAL Paging Data Decoder User Manual Partial Users Manual

Advanced Signal Corporation Paging Data Decoder Partial Users Manual

Partial Users Manual

Version 1.7 December, 1997 Console Operation 4 - 1Slot 1-4The four Slot folders allow you select several parameter settings for each of the four slots. If yourSIGNALpro contains less than four DSP Input Cards there will be certain slot folders that are notaccessible.DSP OperationMode - This is used to place the DSP Input Card into different modes of operation. Forward (Assume A8-A10 is R25) is for normal Golay, POCSAG, FLEX, and ReFLEX25 decoding. Forward (Assume A8-A10 isR50) is for ReFLEX50 decoding and may be implemented at a later date. Reverse will be implemented ata later date. RSSI places the DSP Input Card into an RSSI only mode. WHILE IN THIS MODE THE DSPINPUT CARD WILL NOT DECODE PAGING DATA. THEREFORE THE LEDs WILL NOT OPERATE INTHEIR NORMAL CAPACITY. THE FORMAT AND BER LEDs WILL BE GREEN. WHEN YOU HAVECOMPLETED YOUR RSSI ONLY TASK PLEASE REMEMBER TO CHANGE THE DSP MODESELECTION TO FORWARD. Teletrac POCSAG was implemented for Teletrac, Inc.Sync Measurement - This is used to determine how FLEX Sync Receive Time Measurements arecalculated. FLEX frames may be launched on a 1.875 second time boundary. If the launch times slip by2-3 milliseconds (consult your pager supplier for exact specifications) the pager can lose sync andbecome inactive until it receives a valid sync. This is a method to determine that the control system islaunching FLEX frames in accordance with the protocol specifications. These measurements will rarelybe zero because of many factors including delay through your system.Set to Relative if your encoder is not creating FLEX frames synchronous to a GPS time source, or if youare only interested in knowing that the frame just received is accurate relative to the last frame received.A measurement baseline is established with the first frame received and is updated with a new baselineevery eight minutes (two cycles). Set to Absolute if your encoder is producing FLEX frames synchronousto a GPS 1PPS reference and is also encoding FLEX frames synchronous to the beginning of a GPSminute. This can be used if you are sharing a channel with another carrier, or if you want to determine ifyour frames are being received with absolute accuracy. The baseline is established from the GPS 1PPS.FLEX frames must begin exactly at the top of a minute and can be repeated every 1.875 secondsthereafter. The last frame in a minute will be at 58.125 seconds. Absolute Sync measures the errorbetween your FLEX transmission and the fixed 1.875 second time slots. Refer to the Simulcast DelaySpread section, page 6-3.Reset the Metrics Timer - If you select this option all of your metrics will be cleared. This allows you tostart collecting new data for each of the static windows (Hourly Usage/Efficiencies, Call Count, ChannelMetrics, or Synchronous Receive Times). Depending on channel traffic and on the speed of your PC itmay take several minutes for the Windows to clear. Once the new data starts accumulating you will see anew date and time in the Metrics Start Window(s).
Version 1.7 December, 1997 Console Operation 4 - 2Receiver Operation - Under Frequency (MHz) you can access the pull down menu to select whatfrequency you would like the internal receiver programmed to. If you want to program a frequency that isnot included on the list please contact Advanced Signal for assistance.

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