Digital Standard GSM/EDGE
SMIQ
1125.5555.03
2.304
E-9
2.18.3
Lists as Internal Data Source
A freely programmable memory on the data generator serves as internal data source for the data fields
of the slots. The data are managed in so-called lists. A list editor allows data lists (DATA LIST) to be
selected, copied, modified, and deleted.
The list editor is available via menu DIGITAL-MOD - SOURCE....
2.18.4
External Modulation Data
External data can (only) be applied via the SERDATA interface. A selection of SERDATA as data
source is only possible for a single data field of a slot. For further information on the characteristics of
the SERDATA interface see Annex A.
To ensure that the external data bits are assigned to specific positions in the data field of the selected
slot and that they are reproducible, the buffer of the RS-232 transmitter and receiver has to be deleted.
A triggered start has to follow.
The following setting sequence is required in the DIGITAL STD - GSM/EDGE menu:
1. Carry out desired settings in menu.
2. Select data source SERDATA for the data field of the slot using SELECT SLOT - ....
3. Make connection to external data source, but do not yet start external data source.
4. Switch off digital standard using STATE - OFF.
5. Set TRIGGER MODE ARMED_AUTO.
In this state, SMIQ is ready for reception, but discards data that are read in via SERDATA.
6. Switch on digital standard with STATE ON.
7. Start external data source.
The read-in data are written into the receiving buffer. Only if this buffer is filled can SMIQ react to a
trigger event.
8. Activate trigger event. Signal generation is thus started at a frame limit. The first bit received via
SERDATA is put to the first bit position in the selected data field.
