Comtech EF Data SDM-2020, Инструкция по установке и эксплуатации

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SDM-2020 Satellite Demodulator Remote Control Operation
Rev. 3 B–23
B.9.4 G.703 Interface Commands
External
Clock
Reference
Frequency Command:
Response:
Status:
Response:
<add/ERF_nnnnn.n’cr’
>add/ERF_nnnnn.n’cr’’If]
<add/ERF_'cr'
>add/ERF_nnnnn.n'cr''lf']
Where:
nnnnn.n = 1544.0 to 20000.0 kHz (external clock frequency in
8.0 kHz steps) or at RX Data Rate
Buffer Clock Command:
Response:
Status:
Response:
<add/BC_xxx’cr’
>add/BC_xxx’cr’’If’]
<add/BC_’cr’
>add/BC_xxx’cr’’If]
Where: xxx = INT (Internal SCT Clock), EXT (External TX
Terrestrial Clock), SAT (RX Satellite Clock), REF (External
Clock-Reference Frequency).
Interface
Loopback Command:
Response:
Status:
Response:
<add/ILB_xxx’cr’
>add/ILB_xxx’cr’’If’]
<add/ILB_’cr’
>add/ILB_’cr’’If’]
Where: xxx = On or Off.
Interface
Buffer Size Command:
Response:
Status:
Response:
<add/IBS_nn’cr’
>add/IBS_nn’cr’’If’]
<add/IBS_’cr’
>add/IBS_nn’cr’’If’]
Where: nn = 0 to 32 milliseconds (Buffer size in 2 ms steps)
Interface
Buffer
Center Command:
Response: <add/IBC_’cr’
>add/IBC_’cr’’If’] Where: nn = 0 to 32 milliseconds (Buffer size in 2 ms steps)
Interface
Coding
Format
Receive Command:
Response:
Status:
Response:
<add/ICFR_xxxx’cr’
>add/ICFRR_xxxx’cr’’If’]
<add/ICFR_’cr’
>add/ICFR_xxxx’cr’’If’]
Where: xxxx = AMI, HDB#, B8ZS, or B3ZS.
Interface
Receive
Framing
Structure Command:
Response:
Status:
Response:
<add/IRFS_fffff_ssss’cr’
>add/IRFS_fffff_ssss’cr’’If’]
<add/IRFS_fffff’cr’
>add/IRFS_fffff_ssss’cr’’If’]
Where:
fffff = 1544, 2048, 6312, 8448, 32064, 34368, 44736, or
51840 (frame type).
ssss = None, G704, G742, G743, G745, G747, G751, or
G753 (framing type).
Notes:
1. Valid 1544 frame structures are None and G.704.
2. Valid 2048 frame structures are None and G.704.
3. Valid 6312 frame structures are None, G.704, G.743,
and G.747.
4. Valid 8448 frame structures are None, G.704, G.742,
and G.745.
5. Valid 32064 frame structures are None and G.752.
6. Valid 34368 frame structures are None, G.751, and
G.753.
7. Valid 44736 frame structures are None and G.752.
8. Valid 51840 frame structures are None and STS-1.
TX
Terrestrial
Clock
Reference
Frequency Command:
Response:
Status:
Response:
<add/TRF_nnnnn’cr’
>add/TRF_nnnnn’cr’’If’]
<add/TRF_’cr’
>add/TRF_nnnnn’cr’’If]
Where: nnnnn = 1544, 2048, 6312, 8448, 32064, 34368,
44736,
or 51840 in kbit/s.