MANUAL P/N 900000019 REV G
9
2
Installation
2.1 Scope of Section
Section 2 provides installation instructions for the Brandywine Communications
Multi-Channel Time Distribution Unit (Model TDU-310).
2.2 Unpacking and Inspection
Remove the TDU-310 from its shipping container. Visually inspect the unit for
any damage and loose hardware. If any shipping damage is observed,
immediately notify the carrier and Brandywine Communications.
The TDU-310 occupies 1U (1.75 inches) of vertical cabinet space.
2.3 TDU-310 Configuration
Refer to Figure 6.4 for the locations of the push on jumper links. The TDU-310 is
extremely flexible with respect to the input and output configurations. Setup is
done using the push on jumpers on the main printed circuit board assembly.
WARNING:
Remove the AC power cord before removing the top cover of the TDU-310.
To remove the top cover of the TDU-310, remove the four side screws and the
center front panel screw. This will expose the main printed circuit board
assembly. Install the jumper links as required. Note that the 5/10 V pulse
outputs typically used for the 1 PPS may be configured to be either a 50 ohm
source impedance or a low source impedance. The 50 ohm source impedance
is recommended when driving a 50 ohm terminated coaxial cable for correct
impedance matching to prevent pulse reflections. The load will see a 5 V pulse
in this configuration. When all link installations are correct, replace the top cover
using the five screws.
Please note that the factory default settings are
shown in BOLD font.
