Programming instructions

Downloading and Using Files
Data Transfer Troubleshooting
Chapter 4194
“Pattern RAM Memory Depth” Requirement It is possible to exhaust the available
PRAM with a large, continuous user file transmitted across a large number of frames.
In the previous example, selecting the 233,016-bit user file as the data source for the
GSM Normal timeslot will cause the firmware to compute 2,044 frames of data, filling
2,555,000 bytes of PRAM depth. Option 002 (4 Mbyte PRAM) is required for this
configuration. Trying to load this data on an Option 001 (1 Mbyte PRAM) signal generator
will cause an error, because there is not enough PRAM to hold the required data.
If PN11 was used instead of PN9, 456 repetitions of the data pattern would require a
933,432-bit user file, requiring 8,188 frames and 10,235,000 bytes of PRAM. Because the size
of this data exceeds the limits of Option 002, you would need to supply a file this size via the
external DATA connector.
Using Externally Generated, Real-Time Data for Large Files The data fields
absolutely must be continuous data streams, and the size of the data exceeds the available
PRAM, real-time data and synchronization can be supplied by an external data source to the
front-panel DATA, DATA CLOCK, and SYMBOL SYNC connectors. This data can be
continuously transmitted, or can be framed by supplying a data-synchronous burst pulse to
the EXT1 INPUT connector on the front panel. Additionally, the external data can be
multiplexed into internally generated framing
The the data fields absolutely must be continuous data streams, and the size of the data
exceeds the available PRAM, real-time data and synchronization can be supplied by an
external data source to the front-panel DATA, DATA CLOCK, and SYMBOL SYNC
connectors. This data can be continuously transmitted, or can be framed by supplying a
data-synchronous burst pulse to the EXT1 INPUT connector on the front panel. Additionally,
the external data can be multiplexed into the internally generated framing