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Comtech EF Data QAM256 User Manual

Page 69

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Remote Operations

QAM256 Digital Video Modulator and Upconverter

C-14

TM077 – Rev. 4.0


Opcode: <2209h>

Set Common Last Rate Control.

<1>

Last Rate Control

(0=Symbol, 1=Data, 2=Auto)


Modulator Query Opcodes

Opcode: <2040h>

Query a modulator's frequency

Query response:
<4>

Frequency

(Binary value, 1 Hz steps)
(Without cable Upconverter the range = 43 MHz to 44 MHz, or
Optional 35 MHz to 37 MHz)

(With cable Upconverter the range = 50 MHz to 862 MHz)


Opcode: <2041h>

Query a modulator's data rate

Query response:
<4>

Data rate

(Binary value, 1bps steps)


Opcode: <2042h>

Query a modulator's symbol rate

Query response:
<4>

Symbol rate

(Binary value, 1sps steps)


Opcode: <2043h>

Query a modulator's last rate control.

Query response:
<1>

Last Rate Control

(0 = Symbol, 1 = Data)


Opcode: <2044h>

Query a modulator's modulation.

Query response:
<1>

Modulation

(0=4 QAM, 1=16 QAM, 2=32 QAM, 3=64 QAM, 4=128 QAM,
5=256 QAM)


Opcode: <2045h>

Query a modulator's spectrum.

Query response:
<1> Spectrum

(0=Normal,

1=Inverted)

Opcode: <2046h>

Query a modulator's framing.

Query response:
<1>

Framing

(0=MPEG 187, 1=MPEG 188, 2=MPEG 204, 3=Data)

Opcode: <2047h>

Query a modulator's interleave and Encoder.

Query response:
<1> Interleaver/Encoder (For

Annex-A)

(0 = 1,204, 1 = 2,102, 2 = 3,68, 3 = 4,51, 4 = 6,34, 5 = 12,17, 6 =
17,12, 7 = 34,6, 8 = 51,4, 9 = 68,3, 10 = 102,2, 11 = 204,1)
(For Annex-B)
(12 = 128,1, 13 = 128,2, 14 = 64,2, 15 = 128,3, 16 = 32,4, 17 =
128,4, 18 = 16,8, 19 = 128,5, 20 = 8,16, 21 = 128,6, 22 = 4,32,
23 = 128,7, 24 = 2,64, 25 = 128,8, 26 = 1,128)


Opcode: <2049h>

Query a modulator's roll off.

Query response:
<1>

Roll off

(0=0.12, 1=0.15, 2=0.18)


Opcode: <204Ah>

Query a modulator's interface type.

Query response:
<1>

Interface Type

(0 = STS1, 1 = G.703-E3, 2 = G.703-T3, 3 = Normal ASI, 4 =
Advanced ASI, 5 = DVB Parallel, 6 = M2P Parallel, 7 = ECL, 8 =