Maintenance
M7/M7L/M7LT Modular Satellite Modem
3-84
M7/M7L/M7LT - Rev. 0.05
modulator related alarms assigned to Alarm A and all demodulator related alarms assigned to Alarm
B.
The open collector outputs for the modulator and demodulator alarms are available on the data
interface connector and may be used by redundancy switches for determining alarm status. The
modem’s built-in redundancy switch logic uses either all alarms or combinations of the A and B
alarms to activate a switch request.
The summary Alarm LED is the
“OR” function of either of the alarm relays. The modem allows the
user to select such items as a low input level or E
b
/N
o
to activate an alarm. By providing two relays
and the configuration options, several alternative alarm indication scenarios can be arranged.
Descriptions of alarm conditions that can be mapped to alarm outputs are shown in Table 3-5 through
Table 3-10.
3.7.14. Setting the Modem Station ID Name
Each modem contains two unique identification entries available at the front panel or remotely. They
are the unit serial number and the Unit Name or “Station ID”. The serial number is set at the factory
and cannot be changed, but the Station ID can be set and changed whenever necessary. This field
allows identification of the modem with up to 16 characters.
The Station ID can be set in the front panel
<Unit: Status
– Station ID>
parameter and pressing
“Edit” to begin entry. Each character position is selected using the right and left arrow keys, and the
character at that position is set using the up and down arrow keys. When the proper entry is achieved
press the “Enter” key to finalize the input. The first character is the “Space” followed by the characters
below.
Table 3-13
– ASCII Characters Available for Unit Station ID
ASCII Characters Available for Unit Station ID
Char
Char
Char
Char
Char
Char
Char
!
/
.
M
]
l
{
“
0
?
N
^
m
|
#
1
@
O
_
n
}
$
2
A
P
‘
o
%
3
B
Q
a
p
&
4
C
R
b
q
&
‘
5
D
S
c
r
(
6
E
T
d
s
)
7
F
U
e
t
*
8
G
V
f
u
+
9
H
W
g
v
,
:
I
X
h
w
-
;
J
Y
I
x
.
<
K
Z
j
y
=
L
[
k
z
When entering this parameter via a terminal connected to the remote port, the Station ID name is
entered directly as text from the terminal keyboard. After any entry mode the processor will center the
input characters on the lower line of the LCD display
