Provides an output clock synchronized to the selected reference; programmable 1,5, or 10
MHz TTL.
INT#
SOURCE OF INTERRUPT
0
External event input has occurred
1
A periodic output has occurred
2
The time coincidence strobe has occurred
3
A one second epoch (1 PPS output) has occurred
4
An output data packet is available
All modes of operation are supplemented by flywheel operation i.e. I f synchronization
source is lost the TFP will continue to function at the last known reference rate.
Generates synchronized IRIGB timecode; modulated and DC level shift formats are produced
simultaneously.
Programmable frequency output (periodics) is provided. The output frequency is 10,000,000
/ (nl * n2). 1<nl <65536 & 1<n2<65536
A time coincidence strobe output i s provided. Programmable from days through
milliseconds. This strobe also has an each second mode programmable to milliseconds.
Five maskable interrupt sources are supported. IRQ levels 1 through 7 are programmable.
Time of day, hours, minutes, and seconds, are displayed on front panel LED's.
Most inputs and outputs are accessible via the P2 connector.
1.2 PHYSICAL AND FUNCTIONAL OVERVIEW
The TFP is a B size module (6U X 160 mm) . Operation is controlled by a block of 32 D16 registers
written and read by the host via the VMEbus (A16 : D16). The TFP is available in two versions.
The bc635VME is intended for use in a VMEbus system with most I/0 signals available on rows A
and C of the P2 connector. The bc350VXI is intended for use in a VXlbus system, and is shipped
without a P2 connector. A dip switch is used to select VME or VXI compatibility. I n VMEbus
systems the register block can be located on any 64 byte boundary. I n VXlbus systems the register
block can be located at any of the 256 Logical Addresses (A15 and A14 must be high). The Logical
Address is returned during an interrupt acknowledge cycle.
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