Comtech EF Data SDM-2020 - Manual (Page 262)

Errata C
Comtech EF Data Documentation Update
Subject: Changes to 5.6.7.4 Utility: Modulator: Modulator Type
Date: July 11, 2003
Document: SDM-2020 Satellite Modulator Installation and Operation Manual,
Rev. 7, dated June 30, 2002
Part Number: MN/SDM2020M.EC7
Collating Instructions: Attach this page to page 5-26
Comments:
The following changes provide updated information for Paragraph 5.6.7.4. This information will
be incorporated into the next revision.
Change Specifics:
5.6.7.4. UTILITY: MODULATOR: MODULATOR TYPE
MODULATOR TYPE
DVB-1
Use this menu to select a spectral mask type of DVB-1, DVB-2, or DVB-99:
DVB-1 This is the default mask and is the “Best Fit” to the ETS 300 421 mask.
DVB-2 This mask has a sharper cutoff in the transition region from 3 to 40 dB
resulting in a narrower spectral, than DVB-1, at the 35 dB down region.
99% BW 99% of the transmitted energy is contained within a bandwidth ≤ 1.2 x
(Symbol Rate).
1. While in this menu, press to turn OFF the TX-IF Output.
2. Press a second time to turn ON the TX-IF OUTPUT.
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