Connecting A Dsr-4550 For L-Band Input - Motorola DSR-4550 Operator's Manual

2

Connecting a DSR-4550 for L-Band Input

To Connect a DSR-4550 for a New DigiCipher II Service
Determine which satellite, transponder, Virtual Channel Table (VCT) number, virtual
1.
channel, and audio mode (stereo, surround, mono, or dual mono) is to be used. Contact
the programmer or network administrator to obtain this system information so that the
desired services can be set up and received.
Connect the L-band inputs from the dish antenna and Low Noise Block (LNB). If LNB
2.
power is needed, use port 1, navigate to the appropriate menu (see "Port Config Menu"
on page 24), and turn LNB power On. The default for LNB power is Off. Choose one of
the following polarity configurations:
a.
b.
To view video and On-Screen Diagnostics (OSD) during installation, connect the OSD
3.
Video Output on the DSR-4550 to a 75-ohm video monitor. To view video, connect the
Video Output to a channel modulator. Refer to "Viewing the Fast Fact Diagnostic
Screens" on page 72.
To listen to audio during installation, connect the audio outputs to a local amplifier and
4.
speaker. A standard stereo system will suffice, but the lack of differential audio inputs
may make the audio seem degraded. After the DSR-4550 is authorized and providing
the desired service, reconnect these outputs to the channel modulator. Since these are
differential pairs, it is recommended to use two pair shielded audio cables rather than
the single wire and shield type.
Note: For best quality audio, take care to ground the shield on both the IRD GND
terminal and at the channel modulator end.
To set up the IRD for use in the network, choose one of the following audio
5.
configurations:
a.
b.
DSR-4550s are able to generate cue tones when commanded over the satellite link. If
6.
8
For a single polarity L-band satellite connection, connect the coax from the LNB
(either horizontal or vertical) to Port 1 through Port 8.
For installations using both polarities of a satellite, connect one LNB coax to each
port. The polarity is programmable for the DSR-4550. The default polarity for
Port 1 is ---.
For services transmitted in stereo and used in your plant as stereo, connect the Left
Audio Out terminals (L+ and L-) to the left audio inputs on the channel modulator,
and connect the Right Audio Out terminals (R+ and R-) to the right audio inputs on
the channel modulator.
For services transmitted as a single mono, connect the Left Audio Out terminals
(L+ and L-) to the audio inputs on the channel modulator. Right Audio Out
terminals (R+ and R-) also contain the single mono. For more details about mono
configurations, see "Audio Mix Field" on page 25.