Musical Instrument User Manual

6 - 24 THE CPL PROTOCOL
sample 2 bytes (Most Significant Byte + Least Significant Byte), representing
the 16 bit sample value (bit 16 = -32768, bit 15 = 16384, ..., bit 1 = 1).
Range: -32k (down) to +32k (up)
checksum 1 byte checksum of all sample bytes
(add one by one; result modulus 256)
Example:
In this example, a waveform of 512 points is generated in the computer and sent to
the oscilloscope. The display of the waveform on the oscilloscope screen consists
of two sine waves (amplitude = ± 3 vertical divisions and period (2π) = 5 horizontal
divisions). The Y-scale will be set at 500 Volts per division, and the X-scale at
50.0 µs per division. The following values can be calculated from these settings:
- The number of waveform amplitude points = 3 divisions * 6400 points/div. = 19200
(used in the example program)
- The number of waveform time points = trace length (512) / 2
*
2π) = 40.744
(used in the example program)
After running the example program, perform the following:

Select the default setup by pressing the front panel keys STATUS and TEXT
OFF at the same time.

Select the digital mode by pressing the ANALOG key.

Select the recall menu by pressing the RECALL key.
Use the TRACK button and the software keys to turn the m4 register display
on and the acq display off.

Press the STATUS key.
Example: 1000000011000111 = value -32569
byte 1 byte 2
byte 1 = 128 (value -32768)
byte 2 = 128+64+4+2+1 = 199 (value +199)
<Y_resolution> =- = 78.13E-3V
500 V/div.
6400 dots/div.
<X_resolution> =- = 1E-6s
50 µ/div.
50 dots/div.