Comtech EF Data CDM-550T Manual page 57

CDM-550T Satellite Modem
(CONFIG, MASK) TX-AIS
6.2.3.6 (CONFIG) IMPED (IF impedance)
Rev. 1.3
SEL TX-AIS ALARM MASK:
ACTIVE MASKED(PRESS ENT)
Select either ACTIVE or MASKED, using the LEFT/RIGHT arrow keys, then
press ENTER.
If the user selects ACTIVE, then a Transmit Traffic fault will be generated
whenever the transmit circuitry senses that the 'all ones' condition is present in
the transmit data.
If the user selects MASKED, no alarm will be generated .
SELECT IF IMPEDANCE:
50 OHMS 75 OHMS (ENTER)
Select either 50 ohms or 75 ohms, using the LEFT/RIGHT arrow keys, then press
ENTER.
Front Panel Operation
6–27