Comtech EF Data SDM-9000 - Manual (Page 71)

SDM-9000 Satellite Modem Configuration
Rev.4 3–13
3.5.2.3.2 Nyquist Filter Replacement
1. Replace the TX filter (AS/4124-1) or RX filter (AS/4124-2) as follows:
a. Remove the TX/RX filter card (AS/4124) in accordance with
Section 3.5.2.3.1.
b. Carefully install the TX/RX filter card on the three 10-pin connectors.
Note: The TX/RX filter cards are keyed for easy installation.
TX Filter
Connectors
RX Filter
Connectors
Filter Modulator Filter Demodulator
JP1 JP1 JP1 P1
JP2 JP2 JP2 P3
JP3 JP4 JP3 P2
CAUTION
Ensure the connector pins are not bent during installation.
c. Install the four 1/4” hex nuts to the standoffs, and tighten using the 1/4” nut
driver.
2. Install the modulator or demodulator in the modem.