Installing the Equipment
Page 2-10
Instruction Manual: Professional Receivers and Decoders (IRD)
ST.TM.TT1220.1
Remote Connector
The RS-232 connector labelled remote on the back of the equipment
allows for connection to a PC for remote control, software upload or debug
purposes. The
SETUP
ADVANCED
RS232
SETUP
REMOTE
menu is used to
configure the parameters for communicating with the unit. For more
information about remote control, see Chapter 4: Operating the Equipment
Remotely.
Table 2.3: RS-232 Connector
Item
Specification
Connector type
9-way D-type, Female
Connector designation
REMOTE
Pin
Function
Direction
1
Reserved
-
2
Data receive (Rx)
Input
3
Data transmit (Tx)
Output
4
Reserved
-
5
Ground
-
6
Reserved
-
7
Reserved
-
8
Reserved
-
Pin-outs
9
Reserved
-
L-band Input (on QPSK Input Models)
The L-band input is to be connected to a suitable LNB either directly, or via
a suitable attenuator giving adequate consideration to lightning and surge
protection – see Section 2.3.4, Outdoor Antenna.
In most cases an attenuator will not be required. The following list
summarises the circumstances in which one should be used.
1.
If the wanted input level is greater than the specified maximum
permissible (-25 dBm)
2.
If the downlead is a short length of low-loss cable and the LNB in use
has a poor return loss (7 dB min)
3.
If the receiver is receiving one of many carriers in a multi-carrier FDM
system and the level of the wanted signal is close to the specified
maximum permissible
Table 2.4: QPSK Satellite Receiver (L-band) Connector
Item
Specification
Connector type
F- type, Female
Connector designation
QPSK IN, DC OUT
Pin:
Centre
Shield
RF Input
Ground / Chassis
LNB Supply
0, 13 or 18 Volts dc
max 450 mA
Impedance
75
Ω
