System 5900 Dsp Commands; System 5900 Transmitter Commands - Klein 3900 Series Operation And Maintenance Manual

B.6.7 System 5900 DSP Commands
The following commands are available to control the System 5900 DSP board:
$DR:
$DTd:
$DCd:
$DAd:
$DHyd:
B.6.8 System 5900 Transmitter Commands
The following commands are available to control the System 5900 Transmitters.
There are two transmitter boards. The board that controls the lower 64 channels is
'X'. The other board is referred to as 'Y'. The commands shown use 'X'. To
control the other board change the 'X' to 'Y'.
$XWd:
Towfish Commands
Resets the DSP. This command resets the DSP card to its
initial default state.
Selects the DSP test mode where d = 0 – 5. Test mode '0' is
off. Test mode '1' puts a fixed word into each channel such
that channel0i = 0, channel0q = 1, channel1i = 0x100,
channel1q = 0x101, channel2 = 0x200, etc. Test mode '2'
sets channel0i and channel0q to 0x7fff and all other
channels to 0. Test mode '3' puts a sliding ramp test pattern
into the channels. Test mode '4' slowly increases all
channels. Test mode '5' puts the value 0x4321 into all
channels.
Sets the DSP lowpass filter cutoff frequency where d = 0 –
9. The cutoff frequency is then given by Fc = d + 1 kHz.
Turns on|off the magnitude function. When d = 1 the DSP
finds the magnitude by performing x = sqrt(I^2 + Q^2). The
resultant magnitude information for each channel is then
passed to the TPU as a 32-bit value. If d = 0 the DSP passes
the I and Q data up as two 16-bit words for each channel.
System 7180/5900 only. Sets the saturation detect headroom
threshold d for receiver card y where d is a 16-bit
hexadecimal number (0x0000 thru 0xFFFF) and y is A, B,
C, or D. The headroom threshold is used by the DSP to
compare each A/D value on every channel to determine if
any raw samples exceed the threshold. When the threshold
is exceeded, a threshold count for that channel is
incremented. The threshold count for each channel is then
placed in the first Q sample word for that channel in every
ping. Each ping resets all the threshold counters.
Selects the transmit waveform where d = 0 – 3. The
waveforms are 0 = 50 µs, 1 = 100 µs, 2 = 150 µs and
3 = 200 µs. Setting d = 0xf selects a null waveform (no
transmit).
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