Table of Contents
Advertisement
SDM-2020 Satellite Demodulator
B.9
Data Interfaces
B.9.1
RS422 Interface Commands
Interface
Command:
Select
Response:
Command
Status:
Response:
DM State
Command:
Control
Response:
Status:
Response:
RR State
Command:
Control
Response:
Status:
Response:
Where 'pn' is the last parameter returned.
Parameter
Number
23
24
25
26
27 to 32
Rev. 3
<add/ISEL_xxx'cr'
>add/ISEL_xxx'cr''lf']
<add/ISEL_'cr'
>add/ISEL_'cr''lf']
<add/DM_xxx'cr'
>add/DM_xxx'cr''lf']
<add/DM_'cr'
>add/DM_xxx'cr''lf']
<add/RR_xxx'cr'
>add/RR_xxx'cr''lf']
<add/RR_'cr'
>add/RR_xxx'cr''lf']
Parameter Name
(Command Reference
Interface Select
(ref. 'ISEL_"command).
Reserved
DM State Control
(ref. 'DM_"command)
RR State Control
(ref. 'RR_'command)
Reserved
Where: xxx = DVB or 530.
This command selects which interface connector will be used
for data.
Where: xxx = NRM (normal sense) or INV (inverted sense).
This command controls the logic sense of the DM (DCE-ready)
signal.
Where: xxx = NRM (normal sense) or INV (inverted sense).
This command controls the logic sense of the RR (receiver
ready) signal.
Description
p23 = n, where n = '0' (DVB), '1' (530)
p25 = n, where n = '0' (Normal), '1' (Parallel)
p26 = n, where n = '0' (Normal), '1' Parallel)
Remote Control Operation
B–21
Advertisement
Table of Contents
