Comtech EF Data SDM-300A Installation And Operation Manual page 295

Remote Control Operation
RX Channel Command:
Data Phase Response:
(Channels
#3 and #4) Status:
Response:
B–20
<add/RCDP_x_yyy'cr'
>add/RCDP_x_yyy'cr''lf']
<add/RCDP_x'cr'
>add/RCDP_x_yyy'cr''lf']
SDM-300A Satellite Modem
Where:
x = 3 or 4 (channel number).
yyy = NRM (normal data phasing), INV (inverted data
phasing).
Rev. 4