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QAM256 Digital Video Modulator and Upconverter
<1>
Minor Alarm1
<1>
Minor Alarm2
Opcode: <224Fh>
<1>
PRBS
Opcode: <2251h>
<1>
BB Loopback
Opcode: <2253h>
<4>
Tx Power
Opcode: <2254h>
<1>
TX Enable
Opcode: <2255h>
<1>
TX Carrier
Opcode: <2260h>
<1>
Channel Table
Opcode: <2261h>
<1>
Channel
The following information is applicable to the QAM256 Cable Upconverter:
TM077 – Rev. 4.0
(Bit 6 = Spare)
(Bit 7 = Spare)
(0 = mask, 1 = allow)
(Bit 0 = Clock Activity Fault)
(Bit 1 = Data Activity Fault)
(Bit 2 = FIFO Fault)
(Bit 3 = Mod Clock Activity Fault)
(Bit 4 = Spare)
(Bit 5 = Spare)
(Bit 6 = Spare)
(Bit 7 = Spare)
(0 = mask, 1 = allow)
(Bit 0 = Spare)
(Bit 1 = Spare)
(Bit 2 = Spare)
(Bit 3 = Spare)
(Bit 4 = Spare)
(Bit 5 = Spare)
(Bit 6 = Spare)
(0 = mask, 1 = allow)
Command a modulator's PRBS (test pattern)
(0 = Normal, 1 = PRBS23, 2 = PRBS23M, 3 = PRBS15, 4 =
PRBS15M)
Command a modulator's Base Band Loopback
(0 = Normal, 1 = Loopback)
Command a modulators output power level
Without cable Upconverter, value is in dBm.
(Signed value. +00 to -250 (+0.0 to -25.0 dBm)
(Implied decimal point)
Ex: +0.0 dBm, data returned = 00 00 00 00 = 00 decimal = +0.0
dBm
Ex: -25.0 dBm, data returned = FF FF FF 06 = 100000000 –
FFFFFF06 = FAh = 250 = -25.0 dBm
With cable Upconverter, value is in dBv.
(Signed value +450 to +600 (+45.0 to +60.0 dBv)
(Implied decimal point)
Command a modulator's carrier control
(0=Off, 1=On)
Command a modulator's carrier test
(0=Normal, 1=CW)
Command a modulator's channel table
(0 = EIA STD, 1 = EIA HRC, 2 =EIA IRC, 3 = Trad STD, 4 = Trad
HRC, 5 = Trad IRC)
Command a modulator's channel
(See channel entry tables at end of protocol)
Remote Operations
C-
19
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