Radyne DM240XR Specifications download pdf (Page 31)

DM240XR High-Speed Digital Modulator User Interfaces

MN-DM240XR– Revision 13 4–9

signal. The calibration output bandwidth is set by the symbol

rate currently programmed into the DM240XR Modulator.

During calibration, the AutoEQ™ will compute the coefficient

values required to successful equalize the group delay and

amplitude of the satellite link over the programmed symbol rate.

During this process, the MSE can be monitored reflecting the

calibration process. Upon successful completion of the

calibration, the EQ CAL will revert to the “Normal” state, and

the event logof the DM240XR will reflect “AutoEQ™ CAL

SUCCESSFUL”.

(EQ CAL: Cont)

REF ACQ: Although default reference files are provided, the

operator may wish to acquire the best possible reference from

their modulator. A mechanism to accomplish this is allowed by

REF ACQ, this overwrites the stored default and replaces it with

a new reference. Prior to entering this state, the L-Band output

of the DM240XR (J11) must be connected to the AutoEQ™

RXRF Input (J12) as shown in Appendix D. The DM240XR

Output power should be set to -20 dBm, and a 20 dB in line

attenuator should be used. The Modulator output frequency

should be set to set to the corresponding AutoEQ™ RXRF Input

Frequency. When properly connected and in this state, the

AutoEQ™ will program the DM240XR modulated output for the

AutoEQ™ calibration signal. The calibration output bandwidth

is set by the symbol rate currently programmed into the

DM240XR Modulator. During reference calibration, the

AutoEQ™ will obtain receive lock and establish the baseline

coefficients for internal reference. References are captured for

each modulator roll-off and oversample rate. During this

process, the MSE can be monitored reflecting the Reference

Acquisition process. Upon successful completion of the

Reference Acquisition, the REF ACQ will revert to the

“Normal” state, and the event log of the DM240XR will reflect

“REF ACQ SUCCESSFUL”.

RESTORE EQ CAL: {Filename}

Allows the selected Calibration coefficient file to be Restored.

EQ RENAME: {Filename}

Allows the Calibration coefficient file to be renamed using

Alpha-numeric characters.

EQ DELETE: {Filename}

Allows the selected Calibration coefficient file to be deleted.

EQ RECEIVER: {Local, Remote}

Allows selection of Local or Remote Equalization.

4.3.3 Interface Menu Options and Parameters

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 195 196

Comments to this Manuals

No comments

Radyne DM240XR Specifications Page 31

Comments to this Manuals