Telecast Adder TD161, Инструкция по эксплуатации

Страница: 7 / 16

Telecast Fiber Systems
±
5V DC-DC CONVERTER
±
8V DC-DC CONVERTER
ALARM
10k
10k
10k
O
N
2 1
N 2 1
O
Alarm Switch set
to position 1 —
The factory setting for both switches is position 1, On, as shown in Figure 3.
To disable the alarms:
1. Remove the six Phillips head screws holding the top cover.
2. Locate the alarm switch block at the right front of the printed circuit board.
3. Reset the appropriate switch.
4. Replace the top cover and re-insert the holding screws.
The unit may now be mounted into a standard 19-inch equipment rack.
Figure 3: Alarm Switch Location
Line Power Connection
The external power supply provided with your module requires 120 VAC. If the module
is rack mounted, be sure that an AC outlet is within reach of the supply’s 6-foot power
cord.
Plug the power supply into the Switchcraft 4-pin connector on the rear panel labelled
Power Input. Telecast Part ADAP-AC-02 is recommended
Alarm Setup
A high pitched beeping alarm is sounded under two precautionary conditions:
• Alarm 1 sounds whenever the battery backup is switched into use due to loss of
DC input from the external power supply. The Internal Power LED on the front
panel turns on whenever the battery is in use.
• Alarm 2 sounds whenever there is zero signal at both the fiber and coaxial cable
inputs.
Disable Alarms
Individual alarms can be disabled by setting the appropriate slide switch on the internal
main printed circuit board to position 2.
3