RS232 Communication
ProTelevision Technologies
PT 5780 DVB-T Modulator
Instruction Manual
Revision 3.11
6-18
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LPRecorrect:CHECksum
Query command only. This is a simple 32-bit addition sum of all the coefficients from 0 to 23 in
the “active” location or in a particular preset location. The number of ‘preset’ curves can vary
from 1 to 10.
Example:
LPR:CHEC? 2
Response: 511
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LPRecorrect:PRESet
Transfer coefficients to, or read coefficients from, a preset location. The format of this command
is as follows:
LPR:PRES Preset 1 to 10, ”Curve Description”, ”User Point Information”, {real, imag curve
points from 0 to 23}
Example:
LPR:PRES 2,"Name 2",,”0000202020A0002020402020202040204020200040202040
2020202020104040200022102020202020202020202020202020202020202020202020201010
404010",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,511,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0
Save these linear pre-correction coefficients, with
the name “Name 2” in preset 2.
LPR:PRES? 2
Response:
"Name 2",,”0000202020A0002020402
0202020402040202000402020402020202020104040200022102020202020202020202020202
020202020202020202020201010404010",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,511,0,0
,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
•
LPRecorrect:RECall
Transfer the linear pre-correction curve configuration from a preset location to the “active”
location. There are ten linear pre-correction preset locations, 1 to 10.
Example:
LPR:REC 3
Recall linear pre-correction curve from preset
location 3 into the “active” location.
LPR:REC?
Response:
3
6.2.3.10
SFN commands
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SFN DELay
Command to set the local SFN Delay in multiples of 100 ns. The response is also in multiples of
100 ns.
Example:
SFN:DEL 6
Set the SFN delay to 600 ns.
SFN:DEL?
Response:
6
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SFN:MARGin?
Query only command to view the actual delay (in ms) from a mega-frame is received in the input
buffer till it’s transmitted from the modulator. For a hierarchical system this query represents the
actual delay for the high priority signal.
Summary of Contents for PT 5780
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