EV9902A Datasheet, PDF (20/23 Pages) CML Microcircuits – Measures Bit Error Rate

Interface Kit for EV9900A
EV9902
6.3. Hardware Description
The EV9902 kit contains two boards: the hyBoard-XS and the EV9902 Interface Card. These are
intended for use with the EV9900A Evaluation Kit only. For a detailed description of the EV9900A
Evaluation Kit and the hyBoard-XS hardware, please refer to the relevant datasheet.
The EV9902 Interface Card allows communication between the EV9900A and hyBoard-XS to
occur. It connects the EV9900A parallel interface to the hyBoard-XS, address and data buses,
and provides the necessary signals for successful communication.
6.4. Troubleshooting
The CMX990 is a complex RF and Baseband system. If incorrectly programmed or modified,
results will be at variance from those expected. Please study the CMX990 and EV9900A
datasheets, this manual and the associated schematics and layout drawings carefully when
troubleshooting.
Error Observed
The ES9902 application is
unable to establish a connection
to the hyBoard-XS and the LED,
LED6, is off.
Possible Cause
1 - Bad USB connection
2 – Firmware is not
running
Remedy
Check the USB cable is
connected properly at both the
PC and hyBoard-XS.
Ensure the USB cable is
certified to the USB
specifications
Check the hyBoard-XS jumper
settings against those in Table 2
and cycle the power supply
The EV9900A is not behaving as
expected
1 – Bad connection
between the hyBoard-XS
and the EV9900A
2 – Device setup issue
Check the EV9902 Interface
Card connections
Please refer to the CMX990 and
EV9900A datasheets
Table 3 – Possible Errors
© 2009 CML Microsystems Plc
20
UM9902/3