Motorola SG 2000 用户手册
O p e r a t i o n
5 - 2 3
SG 20 00 Ins tal la tion and O pera tion M anua l
Table 5-9 provides information on the user-related features of the DS-SG2-DRT-2X/A:
T a b l e 5 - 9
D S - S G 2 - D R T - 2 X / A f e a t u r e s
D S - S G 2 - D R T - 2 X / A f e a t u r e s
Feature Desc ription
Test point A and B
These test points enable monitoring of the RF level at the input to
the A/D. It measures
the A/D. It measures
−
20 dB from the A/D input level.
Input A and B
I
ncrement attenuator
setting
Decrement
attenuator
setting
Change
increment/
decrement
direction
Restore factory default
setting
The transmitter has a digitally controlled attenuator that adjusts for
varying input levels. These push-buttons are input level-control
adjustments that provide
varying input levels. These push-buttons are input level-control
adjustments that provide
+
2 to
−
13 dB of adjustment from an input
level of 15 dBmV. No action is taken if both buttons are pressed.
Short press (0.1 to 1.5 seconds). The status LED indication is
green with a short OFF blink (0.25 sec.) when the button is
released. A short red blink occurs if the increment attempts to go
past the maximum.
green with a short OFF blink (0.25 sec.) when the button is
released. A short red blink occurs if the increment attempts to go
past the maximum.
Short press (0.1 to 1.5 seconds). The status LED indication is
green with a short yellow blink (0.25 sec.) when the button is
released. A short red blink occurs if the decrement attempts to go
past the minimum.
green with a short yellow blink (0.25 sec.) when the button is
released. A short red blink occurs if the decrement attempts to go
past the minimum.
Medium press (1.5 to 5.0 seconds). The status LED is OFF after
1.5 seconds when in the increment direction, and yellow when in
the decrement direction. The LED is restored to its green or alarm
state when the button is released. No increment or decrement
occurs.
1.5 seconds when in the increment direction, and yellow when in
the decrement direction. The LED is restored to its green or alarm
state when the button is released. No increment or decrement
occurs.
Long press (5.0 seconds or longer). The status LED flashes green
and yellow rapidly until the button is released. After five seconds of
flashing, the factory defaults are restored.
and yellow rapidly until the button is released. After five seconds of
flashing, the factory defaults are restored.
Status
This tri-color LED is green if all parameters are within specification.
A series of red flashes indicate an alarm condition. The number of
red flashes indicate the parameter that is outside the specification.
A series of red flashes indicate an alarm condition. The number of
red flashes indicate the parameter that is outside the specification.
Alarms
No
alarm
Over temperature (>
++++
85°C)
Low
++++
24 Vdc (<
++++
18 Vdc)
Low
++++
5 Vdc (<
++++
4.5 Vdc)
Low
++++
2.5 Vdc (<
++++
2.2 Vdc)
Laser bias/optical power
out of spec.
Status LED indication:
Steady green
Long red, one red flash (repeating)
Long red, two red flashes (repeating)
Long red, three red flashes (repeating)
Long red, five red flashes (repeating)
Long red, six red flashes (repeating)
Long red, one red flash (repeating)
Long red, two red flashes (repeating)
Long red, three red flashes (repeating)
Long red, five red flashes (repeating)
Long red, six red flashes (repeating)
RF input B
This input is the second RF return signal that is obtained from the
adjacent transmitter connector through a provided cable. The cable
is illustrated in Figure 5-27.
adjacent transmitter connector through a provided cable. The cable
is illustrated in Figure 5-27.
It is recommended that you restore the factory default settings before you set up the node levels. This
procedure places the transmitter input level 2 dB below maximum.
procedure places the transmitter input level 2 dB below maximum.