Specifications

6-22 888-2500-001 5/2/2013
WARNING: Disconnect primary power prior to servicing.
DAX-1/DAX-3
Section 6 Troubleshooting
6.2.2.6.2 Test Tone Setup
(1) Amplitude: Pressing ‘1’ allows the user to raise or lower the level of modulation of
the test tones used in the off-line training sequence using the UP/DOWN arrow keys. In
normal operation set to 9000.
(2) # of Tones: Pressing ‘2’ allows the user to raise or lower the number of test tones
used in the off-line training sequence using the UP/DOWN arrow keys. In normal
operation set to 14.
(3) HPF Sparse #: Pressing ‘3’ allows the user to increase or decrease the length of
equalization filter by inserting sparse taps between the filter taps used to estimate the
transmitter output filter during the off-line NL and PM Correction training sequence.
This equalization filter compensates the RF Sample feedback signal for amplitude and
frequency response prior to being used to estimate the NL and PM characteristics. In
normal operation set to 0.
(4) HPF Taps: Pressing ‘4’ allows the user to increase or decrease the number of digital
filter taps used to estimate the output filter response during the off-line NL and PM
correction training sequence. In normal operation the HPF Taps are set to:
32 for DAX-5 & 6 models
16 for DAX-1, 3 & 1R models
(5) NL Sparse #: Pressing ‘5’ allows the user to increase or decrease the number of
sparse taps inserted between the four 5
th
-order polynomials used to correct the
nonlinear characteristics of the transmitter. In normal operation set to 3.
(Z) 1kHz Test Tone: Pressing ‘Z’ allows the user to enable the built-in pattern
generator which disables the audio input and outputs a 1kHz 90% modulation tone. This
tone is typically used to setup the feedback samples on the Exciter/Controller.
(E) Address: Pressing ‘E’ allows the user to enter a hexadecimal DSP address used to
peek and poke data in the DSP memory map. This feature is used for debug and
troubleshooting only and can cause improper operation of transmitter if improperly
used.
(F) Poke Value: Pressing ‘F’ allows the user to enter a hexadecimal data value to be
stored at the DSP address in (E) above. This feature is used for debug and
troubleshooting only and can cause improper operation of transmitter if improperly
used.
(G) Peek: Pressing ‘G’ allows the user to read a hexadecimal data value stored at the
DSP address in (E) above.
(H) Increment Address: Pressing ‘H’ increments the hexadecimal DSP address in (E)
above.