DekTec DTM-3237 DVB-S2 Receiver - Manual (Page 5)

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output
User Manual
5
1. Introduction
1.1 General description
The DTM-3237 is a compact OEM module for receiving DVB-S2 or DVB-S and outputting it as
DVB-ASI. The DTM-3237 can supply LNB power and has support for sending and receiving DiSEqC
messages. The transponder details and the output format can be configured programmatically
through several control interfaces.
Figure 1. The PCB of the DTM-3237
A development kit (DTM-3237-DEVKIT; refer to Appendix B) is available for easy setup and
experimentation with the DTM-3237.
1.2 DVB-S(2) input modes
The DTM-3237 supports all functionality described in EN 300 421 (DVB-S) and EN 302 307 (DVB-S2).
All DVB-S2 modulation types can be demodulated: QPSK, 8PSK, 16/32APSK. The DTM-3237 supports
advanced DVB-S2 features including VCM, ACM, Multiple Input Streams (MIS) and Generic Stream
(GS).
1.3 Output modes
The DTM-3237 can output the DVB-S(2) stream in 2 modes: Transport Stream and L.3 Baseband
frames. Please refer to DTAPI Manual - Overview and Data Formats.pdf for more detailed
information about the L.3 Baseband frame data format. This document is part of DekTec’s Windows
SDK and can be downloaded from www.dektec.com .
1.4 Control
The unit can be managed and controlled through one of the available control interfaces: USB, I 2 C or
LVTTL serial control port. Settings applied through a control interfaces are persisted in non-volatile
memory if setting Volatile storage is ‘1’. Persisted settings are automatically reloaded after a power
cycle. The penalty for persisting settings is that it takes some time to store the setting value in non-
volatile memory, and a limit to the number of write cycles to non-volatile memory exist.
If setting Volatile storage is ‘0’, applying settings is immediate, but new setting values will disappear
when power is removed.
There are three ways to control the DTM-3237:
1. From a development PC using the USB control interface. The development PC runs a control
tool: Dtm3237Util or DtmCmd. This way of controlling can be used for pre-configuring the
DTM-3237, or for experimenting with the DTM-3237.