EV9902A Datasheet, PDF (14/23 Pages) CML Microcircuits – Measures Bit Error Rate

Interface Kit for EV9900A
EV9902
Figure 7 – The Modem Transfers Tab
To transmit or receive a frame:
1. Enter the bit synchronisation and frame synchronisation words, in hexadecimal
2. Select the type of the frame data, Mobitex or Unformatted
3. Enter the frame’s data size as the number of Mobitex data blocks or bytes, for Mobitex
frame data or Unformatted frame data, respectively
4. When transmitting, the frame data is loaded from a file, by clicking the ‘Load Data” button
and selecting the file. Any type of file can be used, the raw data from it will be sent as the
data blocks/bytes of the frame. For transmission of Mobitex frames only, it is also
necessary to enter the control bytes, in hexadecimal, to transmit.
5. Start the frame transfer by clicking the ‘Start’ button, which will then become the ‘Stop’
button
A pop-up window will appear once the frame transfer has completed. The data received by a
receive operation can be saved to a file by clicking the ‘Save Data’ button. When the frame
transfer is being performed the other tabs can not be selected. The frame transfer can be halted
by clicking the ‘Stop’ button. The bit synchronisation, frame synchronisation and control bytes are
all transferred in the order bit 7 of the MSB to bit 0 of the LSB.
When the ‘Use Default Settings’ option is selected, each time a frame transfer is performed the
CMX990 is reset and loaded with the default values required to perform the transfer. When the
‘Use Displayed Settings’ option is selected the CMX990 is still reset but the following registers are
set to the current values displayed by the application and not the default values:
© 2009 CML Microsystems Plc
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