SAT-receiver/demodulator
Input frequency
menu
”Input frequency"
”Input level"
”Frequency offset”
”Tuner status”
The input frequency can be adjusted in a range from 920 ... 2150 MHz in steps of 0,1
MHz. The current signal strength as well as the frequency offset of the input signal can
be queried. The displayed frequency offset is defined as follows: offset = received fre-
quency - set frequency. The software is tracking the frequency, until the tuner is lo-
cked. The current status (locked/unlocked) can be queried. For monitoring a warning-
and an alarm threshold can be defined for each parameter.
Symbol rate
Menu ”Input symbol rate”
The symbol rate of the input signal is to be adjusted according to the input signal. It
can be set in a range from 4 ... 45 MSymb/s in steps of 0,1 kSymb/s.
Transport stream
Menu ”TS identifier”
When entering a SAT-input frequency a search starts in a range of
±
8MHz of the set
mid-frequency to find present transport streams. The transport stream identifier (ID)
and the input frequency of the transport streams are displayed.
Unique identification of a transport stream is only possible with the TS ID.
The displayed input frequency of a transport stream can vary about the frequency de-
viation of the LNC-oscillator.
The desired transport stream is to be selected from the available transport streams.
Bit Error Rate
Menu
”Input BER after V.”
The BER of the MPEG-signal can be queried after the Viterbi-decoding.
A warning- or an alarm threshold can be defined.
Code rate input signal
Menu ”Input code rate”
The code rate of the input signal can be queried. The code rate can be monitored by
defining a warning- or an alarm message.
Carrier to noise
Menu ”Input C/N”
The C/N-ratio of the input signal is measured and can be queried. A warning- or an
alarm threshold can be defined.
LNB remote supply
Menu “LNB supply”
With the option “LNB supply” this menu is displayed. The LNB remote supply is used
for the direction of the polarity and is available with 13V (vertical) or 18V (horicontal).
LNB control
Menu “LNB 22kHz”
With the option “LNB supply” this menu is displayed. The 22kHz control signal is used
for the selection of the receiving frequency band.
Putting into operation
IRD 8500/..
2 - 4
Intergrated Receiver Decoder
