Comtech EF Data SNM-1010L - Manual (Page 260)

SNM-1010L Data/Control Modem Revision 0
Specifications MN/SNM1010L.OM
B.6 Local Automatic Uplink Power Control (AUPC)
The following AUPC functions are only available with Reed Solomon overhead. The
operator can select local AUPC to be enabled or disabled.
IMPORTANT
The Turbo Codec is not available when the AUPC/Reed-Solomon daughter
cards are installed.
AUPC Power Levels The operator can select from 0 to -40 dBm in 0.5 dBm steps, for the
nominal, minimum, and maximum transmit power levels.
AUPC Target Noise
Level The operator can select the E
b
/N
0
target setpoint from 3.2 to 16.0 dB
in 0.1 dBm steps.
AUPC Tracking Rate The operator can select the maximum tracking rate from 0.5 to 6.0
dBm/minute in 0.5 dBm/minute steps.
AUPC Carrier Loss
Action The operator can select transmit power level to maximum, nominal, or
hold for both local and remote carrier loss.
Note: Local carrier loss has priority over remote carrier loss.
Remote AUPC The operator can select remote AUPC to be enabled or disabled. The
operator can also select a remote transmit 2047 test pattern and a
remote baseband loopback to be enabled or disabled. The operator
can monitor the remote AUPC 2047 bit error rate.
B.7 Maintenance Philosophy
The fault monitoring capability and the self-test features of the modem are designed to
aid a field-technician in determining if a fault has occurred in the modem. It is expected
that a working spare replace the faulty modem. The faulty modem can then be returned
for repair. The main modem assembly can be removed from the back without removing
the chassis from the rack
.
By using the front panel, the operator can correct the drift due to crystal aging on an
annual basis
.
B–18