1, 5, 10 MHz Sine/MPPS Square Output (87-8108)
10 MPPS Output:
Sine Amplitude
> 4.5 V into 50 W
Sine Harmonic Distortion
< 0.5 V into 50 W
Square Wave 45 to 55%
Synchronization Phase locked to the clock 10MHz to within 10ns
Connector Female BNC
CPU-Aware No
Installation
Note: Follow good ESDprecautions when handling this board.
Installation requires inserting the 1, 5, 10 MHz/MPPS card into an empty lower bay option
slot in the rear of the XL-GPS Time and Frequency System. The card is supplied with
mounting hardware. A Phillips screwdriver is the only equipment needed.
Remove the cover plate of an empty option slot and save the screws. Slide the option card
into the guides on the side rails of the slot. Firmly press the card all the way in so it’s
connector engages the Bus Backplane connector. When the connectors are engaged, the
front of the card should be flush with the adjacent surfaces. Using the previously saved
screws, secure the card in the option slot.
Note: Follow good ESDprecautions when handling this board.
Sine Wave Outputs
1, 5, and 10 MPPS back plane signals are discretely buffered and routed into the appropriate
bandpass filters. These filters select the desired sine component from the square waves.
Pots [R9, R15, and R17] set the amplitude of the 1, 5, and 10 MHz, respectively. The signals
are then routed to Jumpers JP1, JP2, JP3, and JP4 where they can be selected for input to
the output drivers.
Square Wave Outputs
1, 5, and 10 MPPS signals are discretely buffered and routed to Jumpers JP1, JP2, JP3, and
JP4, where they can be selected for input to the output drivers.
Maintenance
This option has been designed to provide maintenance-free operation. Under normal use, it
will require no calibration of adjustment. Adjustment procedures are provided for uses only
after repair. This section contains troubleshooting techniques and adjustment procedures.
098-00116-000 Rev. A............................... Page 163 of 221
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