Comtech EF Data SDM-2020 - Manual (Page 3)

s:\tpubs\manuals\released_word\modems\sdm2020d_rev4\text\errata a.doc 1
Errata A
Comtech EF Data Documentation Update
Subject: Change Modulator/Demodulator Jumper Selection Table
Date: July 19, 2006
Document: SDM-2020 Satellite Demodulator Installation and Operation
Manual, Rev. 4, dated April 18, 2003
Part Number: MN/SDM2020D.EA4
Collating Instructions: Attach this page to page 13-6
Comments:
The following changes provide updated information for Table 13-2.
Change Specifics:
Table 13-2. Modulator /Demodulator Jumper Selection
Modulator Jumper Selection
Jumper ON/OFF Description
JP1 ON Normal Setting for LVDS operation. Selects J6, the LVDS-DVB
connector as an input.
JP1 OFF Normal Setting for ASI operation. Selects J6 as an output for Loopback
or Loop Thru operation in conjunction with the ASI signals.
JP2 ON Normal Setting: Selects pins 2 and 15 of J6 as GND.
JP3 Not Used For future use.
JP4 ON Selects pins 2 and 15 as REFCLKB and REFCLKA outputs from J6. This
is used as a byte clock reference by other equipment.
JP4 OFF Normal setting.
Demodulator Jumper Selection
Jumper ON/OFF Description
JP1 ON Selects J6 as an input for loopback operation.
JP1 OFF Normal Setting: Selects J6, LVDS-DVB connector, as an output for RX
data. Also, it is used for loopback operation in conjunction with the ASI
signals.
JP2 ON Normal Setting: Selects pins 2 and 15 of J6 as GND.
JP3 Not Used For future use.
JP4 OFF Normal Setting. Not Used