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Technical Specification
Page B-10
Reference Guide: TT1222 4:2:0 Professional Receiver
ST.RE.TT1222.2
B.7 Options
B.7.1
QPSK Input Option (TT1222/HWO/QPSK)
The satellite input interface shall be compliant with the DVB specification.
The LNB supply shall meet the requirements of IEC1319-1 (IEC61319-1)
for European satellite receiver interfaces. Any requirements specific to
Japan and USA are not included. Relevant requirements are summarized in
Table B.15: QPSK Demodulator
Parameter Specification
Safety status
SELV
Input connector
F-type (Female), 75
Ω
Symbol Rate
DVB compliant 4 – 30Msym/s and DVB capable
1 – 45Msym/s.
Return Loss at i/p
>9.5 dB (VSWR < 2.0) for each input even if not
selected.
Modulation QPSK
Symbol rate setup
Manual
Frequency range
950 to 2150 MHz
Input level
-65 dBm to –25 dBm [40 dB dynamic range]
Frequency selection
Digital PLL
Tuning Step size
125 kHz
Second order Intercept Point
+15 dBm minimum (referenced to the input)
Third order Intercept Point
+10 dBm minimum (referenced to the input) for an
input signal level of –25 dBm
FEC
RS (188,204), Viterbi – Rates:
1/2, 2/3, 3/4, 5/6, 7/8
LNB power feed
Off, 13.5 Vdc, 18 Vdc output through the RF input
connector
LNB power feed current supply
max 350 mA
LNB power supply tolerance
±
5%
LNB power feed short prot
Automatic recovery when fault is removed.
LNB 22 kHz
ON / OFF
LNB 22 kHz freq. tolerance
±
2 kHz
LNB 22 kHz duty cycle
50
±
10%
LNB 22 kHz amplitude @0-350 mA load
650 mV
±
250 mV
LNB 22kHz rise/fall time 10/90%
10
±
5
µ
s
Spectral inversion
Normal / Inverted
Summary of Contents for TT-1222
Page 10: ...Introduction Page 1 2 Reference Guide TT1222 4 2 0 Professional Receiver ST RE TT1222 2 BLANK...
Page 32: ...Options Page 3 2 Reference Guide TT1222 4 2 0 Professional receiver ST RE TT1222 2 BLANK...
Page 38: ...Options Page 3 8 Reference Guide TT1222 4 2 0 Professional receiver ST RE TT1222 2 BLANK...
Page 50: ...Alarms GPOs Page 6 2 Reference Guide TT1222 4 2 0 Professional Receiver ST RE TT1222 2 BLANK...
Page 56: ...Alarms GPOs Page 6 8 Reference Guide TT1222 4 2 0 Professional Receiver ST RE TT1222 2 BLANK...