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:

©

CML Microsystems Plc

14

2009

UM9902/3