Comtech EF Data DM240XR - Manual (Page 182)

DM240XR High-Speed Digital Modulator AutoEQ™ Interface Operation Guide
MN-DM240XR– Revision 13 D–2
D.3 AutoEQ™ PIIC Interface Theory of Operation
AutoEQ™ PIIC Interface allows the ability to compensate for the overall system Group Delay
and Amplitude Equalization over the satellite by pre-distorting the Uplink Carrier, eliminating the
need for external Group Delay/Amplitude Equalizers. AutoEQ™ will automatically generate the
proprietary profile for the DM240XR to pre-distort the modulator, resulting in Amplitude and
Group Delay equalization over the Satellite Link.
Figure 1. Auto EQ PIIC Card Usage
Auto EQ
PIIC Card
Auto EQ where the Uplink Modulator is in the same footprint of the Downlink and can demodulate itself.
Auto EQ where the Uplink Modulator can not see the Downlink due to cross-strap beam etc.
DM240XR Modulator
Auto EQ
PIIC Card
Hardware Required:
(1) DM240XR
(1) AutoEQ Card (ie. PLR5972)
Software Required:
(1) SS-DM240XR-34 Auto EQ Executable
(1) SS-DM240XR-36 Auto EQ Remote Server (Not Used)
DM240XR Modulator
Hardware Required:
(1) DM240XR
Software Required:
(1) SS-DM240XR-34 Auto EQ Executable
(1) SS-DM240XR-36 Auto EQ Remote Server (Is Used)
DM240XR Modulator
Hardware Required:
(1) DM240XR
(1) AutoEQ Card (ie. PLR5972)
Software Required:
(1) SS-DM240XR-15 Auto EQ Remote Client
Satellite Downlink
DM
240
Tx
DM
240
Tx Satellite Downlink