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Receive carrier reacquisition, Agc output, Demodulator input return loss – Comtech EF Data SNM-1010L User Manual

Page 258: Lnb prime power, Lnb band control, Lnb reference signal

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SNM-1010L Data/Control Modem

Revision 0

Specifications

MN/SNM1010L.OM

B.4.3

Receive Carrier Reacquisition

The modem is programmed to delay the acquisition process upon loss of lock. This will
minimize the acquisition time for a brief loss of the carrier. This delay is programmed
from 0 to 999 seconds in 1-second steps.

B.4.4 AGC

Output

A programmable DC output, proportional to the receive signal level, is available at the
rear panel at 10 mA maximum, 0 to 10V. Default levels are 0V for minimum signal
level and 10V for maximum signal level. The low level (0V) can be programmed from 0
to 10V in 0.5V increments. The high level can be programmed from 0 to 10V in 0.5V
increments.

B.4.5

Demodulator Input Return Loss

The Demodulator output return loss shall be > 10 dB into a 75

Ω load.

B.4.6

LNB Prime Power

The DC input on the center conductor of the L-band connector is selectable
for OFF, 13V, 18V, 24V.

B.4.7

LNB Band Control

The IDU shall provide a 22 kHz tone outbound of L-band input connector per DiSEq
4.2.

B.4.8

LNB Reference Signal

The modem provides an Internal and External reference of 10MHz, which will be
On/Off selectable.







B–16

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