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.
1
Reserved
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.
3
Reserved
0
Always 0
4
Reserved
1
Always 1
5
Reserved
0
Always 0
6
EVENT1
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.
Summary of Contents for X-Series
Page 4: ...4 ...
Page 10: ...10 Contents ...
