ok, reset the pc and tried again and hey presto -
17:44:40.194 INFO Log started
17:44:40.195 INFO Filter Check v1.0
17:44:40.195 INFO
17:44:40.195 INFO
17:44:40.195 INFO Checking AM_KSCATEGORY_CAPTURE filters
17:44:40.225 INFO found: Acer OrbiCam
17:44:40.411 INFO - (output) Capture
17:44:40.411 INFO - (output) Still
17:44:40.411 INFO
17:44:40.411 INFO
17:44:40.411 INFO
17:44:40.411 INFO Checking AM_KSCATEGORY_ENCODER filters
17:44:40.412 INFO
17:44:40.413 INFO
17:44:40.413 INFO Checking AM_KSCATEGORY_CROSSBAR filters
17:44:40.414 INFO
17:44:40.414 INFO
17:44:40.414 INFO Checking AM_KSCATEGORY_TVTUNER filters
17:44:40.415 INFO
17:44:40.415 INFO
17:44:40.415 INFO Checking AM_KSCATEGORY_TVAUDIO filters
17:44:40.416 INFO
17:44:40.416 INFO
17:44:40.416 INFO Checking AM_KSCATEGORY_VBICODEC filters
17:44:40.416 INFO
17:44:40.417 INFO
17:44:40.417 INFO Checking KSCATEGORY_BDA_NETWORK_TUNER filters
17:44:40.420 INFO found: REALTEK 2831U_BDA Filter
17:44:40.427 INFO - (input) Input0
17:44:40.427 INFO
17:44:40.427 INFO
17:44:40.427 INFO
17:44:40.427 INFO Checking KSCATEGORY_BDA_RECEIVER_COMPONENT filters
17:44:40.431 INFO found: REALTEK 2831U_BDA Filter
17:44:40.433 INFO - (input) Input0
17:44:40.433 INFO
Just thought I'd throw in my 2-bits worth - the Compro U90 and Compro U100 cards are also based on the Realtek 2831U. These settings in the bda.ini worked for me:
[VideoMate U1xx digital series]
TUNING_TYPE=DVB-T
RECEIVER_ONLY_MODE=1
FILTER_RECEIVER=VideoMate U1xx digital series
PIN_RECEIVER_IN=Input0