386 Keysight CXG, EXG, and MXG X-Series Signal Generators Programming Guide
Creating and Downloading User–Data Files
Data Transfer Troubleshooting
Data Requirements
— The signal generator requires a file with a minimum of 60 bytes
— For every data bit (bit 0), you must provide 7 bits of control information (bits
1–7).
ERROR –223, Too much data
PRAM download exceeds the size of PRAM memory.
Either use a smaller pattern or get more memory by ordering the appropriate
hardware option.
Table 6-15 PRAM Download – Symptoms and Causes
Symptom Possible Cause
Table 6-16 PRAM Data Byte
Bit Function Value Comments
0 Data 0/1 This is the data bit. It is “unspecified” when burst (bit 2) is set to 0.
1Reserved 0 Always 0
2 Burst 0/1 1 = RF on
0 = RF off
For non–bursted, non–TDMA systems, to have a continuous signal, set this bit to 1 for all
bytes. For framed data, set this bit to 1 for on timeslots and 0 for off timeslots.
3Reserved 0 Always 0
4Reserved 1 Always 1
5Reserved 0 Always 0
6EVENT1
Output
0/1 To have the signal generator output a single pulse at the EVENT 1 connector, set this bit to
1. Use this output for functions such as a triggering external hardware to indicate when the
data pattern begins and restarts, or creating a data–synchronous pulse train by toggling
this bit in alternate bytes.
7 Pattern Reset 0/1 0 = continue to next sequential memory address.
1 = end of memory and restart memory playback.
This bit is set to 0 for all bytes except the last byte of PRAM. To restart the pattern, set the
last byte of PRAM to 1.
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