
Options
3.2 Hardware Enabled Input Options
3.2.1 Limitations
The TT1222 cannot be fitted with the ASI input option and QPSK input option at the
same time.
3.2.2 ASI Input (TT1222/HWO/ASI/IN)
3.2.2.1 General
The ASI Input card supports ASI transport stream on a single BNC
connector.
3.2.2.2 Connector Details
This is a single 75 Ω BNC connector.
Table 3.3: ASI Input Connector
Input Specification
Connector Type BNC 75 Ω socket
Connector designation ASI IN
Pin: Centre
Shield
Analogue Black and Burst Input
Ground/Chassis
Impedance
Last unit must be terminated with 75 Ω
3.2.2.3 Setting up the ASI Input
There are no set-up requirements for the ASI Input card.
3.2.3 QPSK Input Card (TT1222/HWO/QPSK)
3.2.3.1 General
The QPSK F-type connector is located on the rear of the unit. This input
interfaces directly to Low-Noise Block (LNB) and accepts an
intermediate frequency (IF) input in the 950 – 2150 MHz (L-band) range.
The unit can provide DC power, that may be used for polarization
switching on the LNB, as well as a 22 kHz control signal. The maximum
input symbol rate is 44.5 Msym/s.
EN/LZT 790 0002/2 R1A
3-4
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