TRAK MODEL 9100 MODULAR FREQUENCY/TIME SYSTEM
TM4400013 Rev. D
1-3
The signal generation section consists of the 9101 GPS Reference. This module contains a GPS receiver,
precision oscillator, signal generators, and microprocessor. Standard signals from this module include 10 MHz,
1 PPS, 5 MPPS, Composite, and IRIG B time code. Optional signals can be provided in place of standard
signals, refer to appendix D for options.
In a redundant configuration, two GPS Reference modules are installed. In normal operation the outputs from
the primary GPS Reference (A1) provide reference signals through the distribution modules. In case of a failure
in the primary GPS Reference, the backup GPS Reference (A2) is automatically switched online.
A switch on the FSU front panel allows override of automatic switchover. This allows manual selection of
primary or backup GPS Reference regardless of the operating condition of the module. When one GPS
Reference module is installed the front panel switch is inoperable.
The signal distribution section consists of up to six plug-in modules in chassis locations A3 through A8. Three
types of distribution modules are available: DDM, FDM, and TEL. The DDM is used for digital signal distribution,
FDM is used for reference frequency and IRIG B time code distribution, and the TEL is used for T1 or E1 signal
generation and distribution.
The FSU module, A9 provides status and control of the system through an RS-232 and optional Ethernet
interface. With the Ethernet option installed, the Network Time Server (NTS) feature is available. The FSU also
provides an ASCII Time of Day (TOD) output and major and minor alarm relay contacts.
Power supply section can be configured for single or dual redundant operation. The standard power supply
operates from AC power. DC power input is available as an option.
Figure 1-2 Model 9100 Block Diagram
BACK
PLANE
GPS
REFERENCE
A1
GPS
REFERENCE
A2
(Optional
Redundant
Configuration)
FSU
A9
DISTRIBUTION
MODULES
A4-A8
PRIMARY SIGNALS
CONTROL/STATUS
BACKUP SIGNALS
CONTROL/STATUS
PRIMARY SIGNALS
BACKUP SIGNALS
CONTROL/STATUS
CONTROL/STATUS
RS-232 I/0
NTS/
TELNET
(Optional)
TOD
FREQUENCY
OUTPUTS
(24 MAX)
ALARMS
PS
AC/DC
A11
PS
AC/DC
A12
(Optional
Redundant
Configuration)
POWER & STATUS
POWER & STATUS
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