5
CHAPTER 2: Introduction
2. Optical-Receiver Connector: SMA or ST compatible connector for the
optical receiver.
3. Switch-Setting Chart: Identifies the channel-configuration-switch settings.
4. Channel-Configuration Switches: A 6-position DIP switch for each
channel, which you can use to select the internal transmit clock/data rate,
or secondary transmit data in place of the transmit clock. (See
Section
4.1
.)
5. Channel-I/O Connector: A DB25 female connector for each channel.
The 16-channel unit has 16 connectors and switches; the 8-channel unit
has 8 connectors and switches with a cover plate over the unused slots.
6. Locking-Screw Sockets (2 per connector): 4-40 threaded female standoffs
to accept locking screws on the cable connector.
7. Fuse Holder: Holds a Slo-Blo AC-line fuse (1 A for 120-VAC units,
0.5 A for 240-VAC units).
8. AC-Power Cord: Has a U.S. standard 3-prong plug for 120-VAC units
or a standard plug for the country in which the unit is sold for 240-VAC
units. AC-line voltage is printed directly above the point at which the
power cord enters the rear panel.
Figure 2-2. The rear panel.
F
U S E
TX
RX
3
4
5
6
7
8
1
2
