User's Manual

385700-1006-006 DIAGNOSTIC LCP MENU
Document use is restricted to that described on cover 8-4
Set PN Index (CDMA Code) BDR and MDR
This command selects the spreading code to be used by the Transmitter and Receiver
PN spreading generators. The user selects the generator(s), Tx, Rx, or Both to be
loaded, and an index number which points to a lookup table of PN generator initial
conditions. At the completion of this command, the selected PN generator(s) are
reset, the new initial conditions are loaded into the PN generator(s), and the radio
displays the new generator PN index.
Program Synthesizers BDR and MDR
This command is reserved for future use or internal unit testing.
Reserved BDR and MDR
This command is reserved for future use or internal unit testing.
Reset DSP BDR and MDR
This command is reserved for future use or internal unit testing.
Reset PN BDR and MDR
This command allows the user to start one of the PN sequences in the radio at a
known state. The user is prompted for the type of generator reset (continuous, pulsed,
or release from continuous) and which generator, Tx or Rx, to reset..
Reset PN (RX STROBE)
This command performs a pulsed reset of the Rx PN generator with a double
keystroke entry by the user.
SET UPPER THRESHOLD BDR and MDR
The upper threshold value is part of the radio receiver’s confidence test for determining
PN code synchronization. The UPPER THRESHOLD must be greater than the
LOWER and LOWER LOCK thresholds. The actual values used are set at the factory.
Large values for the upper threshold require input high signal levels. If the levels are
set too high, the radio will not be able to declare PN synchronization. If the levels are
set too low, the radio will falsely declare PN synchronization. This will degrade
communications throughput by increasing the amount of time to synchronize to the
incoming PN code. Using this command results in an internal radio receiver reset
condition. This forces a radio receiver to reacquire PN synchronization. The range of
allowable values is 00
16
to FF
16
subject to the above stated requirements.
UPPER THRES W/O PN RESET BDR and MDR
This command is similar to the Set Upper Threshold command except it does not force
the radio receiver to reacquire PN synchronization after the new threshold is loaded.
SET LOWER THRESHOLD BDR and MDR
The lower threshold value is part of the radio receiver’s confidence test for determining
PN code synchronization. The LOWER THRESHOLD must be less than the UPPER
THRESHOLD but greater than the LOWER LOCK thresholds. The actual values used
are set at the factory. Large values for the lower threshold require input high signal
levels. If the levels are set too high, the radio will not be able to declare PN
synchronization. If the levels are set too low, the radio will falsely declare PN