Comtech EF Data SDM-2020 - Manual (Page 210)

SDM-2020 Satellite Demodulator Revision 4
Remote Control Commands MN/SDM2020D.IOM
A–10
26
27
28
thru
40
26
27
thru
40
26
27
28
Interface Select Mode
(ref. 'ISEL_' command).
Interface Loopback
(ref. 'ILB_' command).
Reserved.
SMPTE-310 Interface
Interface Loopback
(ref. 'ILB_' command).
Reserved.
G.703 Interface
External Reference Frequency
(ref. 'ERF_' command).
TX Terrestrial Clock Frequency
(ref. 'TRF_' command).
TX Interface Coding Format
(ref. ‘ICFT_’ command).
and Clock (15) INVERTED.
2. Interface Select Mode (p26) = ASI
and Data (16) INVERTED.
3. Hardware Jumper JP1 (located on ASI/LVDS
Interface) in RX LVDS mode.
4. Interface Select Mode (p26) = LVDS
5. Interface Loopback (p27) = )n.
6. Jumper in TX LVDS mode and Interface Select
Mode = LVDS.
7. Interface loopback (p27) = Off.
p26 = n, where ‘n’ is ‘0’ or ‘1’
(0 = DVB, 1 = 530 for RS-422 Interface)
(0 = ASI, 1 = RS-422 for ASI/RS-422 Interface)
(0 = ASI, 1 = LVDS for ASI/LVDS Interface)
p27 = n, where n = '0' (Off), or '1' (On)
Note: SMPTE-310 Data Rate (p1) shall be 19.392658
Mbps.
P26 = n, where 'n' is '0' (Off), or ‘1’ (On)
Note: G.703 Requirements:
1. Data Rate (p1) shall be valid G.703 rate: 1.544,
2.048, 6.312, 8.448, 32.064, 34.368, 44.736, or
51.840 Mbps.
2. If the EXT REF Frequency (ERF) (p26) is less
or equal to 20.0 MHz, then this ERF shall be
evenly divisible by 8000.
3. If the EXT REF Frequency (ERF) (p26) is
greater than 20.0 MHz, then this ERF shall be
32.064, 34, 368, 44.736, or 51.840 MHz.
p26 = nnnnn.n, external reference frequency in kHz.
P27 = n, where ‘n’ is:
‘0’ = 1544
‘1’ = 2048
’2’ = 6312 ‘3’ = 8448
’4’ = 32064 ‘5’ = 34368
‘6’ = 44736 ‘7’ = 51840
P28 = n, where ‘n’ is ‘0’ or ‘1’