Comtech-ef-data SDM-2020 Instrukcja Użytkownika Pobierz pdf (Strona 122)

SDM-2020 Satellite Demodulator Revision 4

Front Panel Operation MN/SDM2020D.IOM

6–58

UTILITY

FACTORY SET-UP

CAUTION

This configuration is used for factory alignment and filter setup parameters.

To avoid demodulator failure, Factory Setup should not be changed by

unauthorized persons.

6.1.13 Initial Defaults

Initial default settings for the demodulator are listed in Table 6-4.

Table 6-4. Initial Defaults

Configuration Demodulator

Demodulation/Code Rate

(see Note 1)

QPSK 1/2 Energy Dispersal On

Data Rate (see Note 1) 15.000000 Mbps RS Decoder Corr On

Symbol Rate (see Note 1) 16.276596 Msps BER Threshold None

Demodulation/Code Rate

(see Note 2)

QPSK 3/4 E

Threshold None

Data Rate (see Note 2) 44.736000 Mbps E

THRESH ALM Off

Symbol Rate (see Note 2) 32.362213 Msps Sweep Range 100000 Hz

RX IF Frequency (see Note 3) 1200 MHz Reacquisition 0 seconds

RX IF Frequency (see Note 4) 70 MHz RF Input Select 1

LNB Power Off

Configuration Interface

RX Clock Phase (see Note 1) Normal EXT-REF Freq 1544 kHz (see Note 2)

RX Data Phase Normal TX TERR CLK Freq 44736 kbps (see Note 2)

RX Data Fault None TX Coding Format AMI (see Note 2)

DVB Framing Type 188 Buffer Clock RX (Satellite) (see Note 2)

RX 2047 Pattern Off RX Coding Format AMI (see Note 2)

INTF Loopback see Note 2) Off Buffer Size 12 ms (see Note 2)

Monitor

Raw BER 2.4 E-3 DEMOD Spectrum Normal

Corrected BER 4.0 E-3 LNB Current 0 mA

16.0 dB 2047 Pattern No Data

0 Margin

10.0 dBm Buffer Fill 50%

Receive Signal -45.0 dBm 2047 Errors No Data

Sweep Frequency +0 Hz

Utility Demodulator

Demodulator Type DVB

Table 6-4. Initial Defaults (Continued)

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 233 234

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