Advantech AMT-70, Installation And Operation Manual, Page: 98 / 160

AMT-70/AMT-73/AMT-75 Installation and Operation
98
6.1.3
The Modulator Specific Commands
9
The modulator specific commands are listed below:
Figure 3 : M onitor Specifics Commands
Modulator Specifics
Output Interface
toutput
70, 140
or
L BAND
Control output signal frequency
PRBS Polynomial
tprbs
2_23 : 1+x
18
+ x
23
,
2_20 : 1+x
17
+ x
23
,
2_17 : 1+x
14
+ x
17
,
2_15 : 1+x
14
+ x
15
,
2_6 : 1+x
5
+ x
6
,
2_23I : 1+x
18
+ x
23
,
2_20I : 1+x
17
+ x
23
,
2_17I : 1+x
14
+ x
17
,
2_15I : 1+x
14
+ x
15
, or
2_6I : 1+x
5
+ x
6
(note I means inverted)
Get / Set PRBS Polynomial
Signal Control
tsignal
ON or OFF
Controls modulator output
Output Level
tlevel
-25.0 to 0.0
Set the output power in dBm (increment .1bDM)
Continuous wave mode
tcwt
OFF or ON
When OFF, modulator output is normal; when
ON, modulator outputs in CW mode for
n
seconds
Loopback mode
tloopback
OFF or ON
Enables/Disables the L-Band Loopback.
When the TX loopback mode is set implicitly the
receive loopback mode is also set
(rinput loopback).
Effective symbol rate
tsym
Get the effective symbol rate (in sym/s)
Input stage jitter
tjitter
Get the input stage jitter (Hz)
Hardware status
tstatus
0 (Input Stage Lock)
1 (FPGA programmed)
Get the modulator status. The command tstatus
with no parameters returns the binary status.
If the command is followed by the parameter
“details” the decoded status is displayed.
Ex:
Input stream status = LOCKED
FPGA status = PROGRAMMED
Pilot tone control
tpilots
OFF or ON
Control if the pilots tone are used for the
DVB-S2S – DVB-S2N modes.
(for DVB-S2 special demod card)