Relay status matches the front-panel "1 pps sync" LEDĩ-pin connector configured as DCE, 9600 baud. Relay status matches the front-panel "Locked" LED.
May be wired in parallel with other relays to "wire-or" a single alarm. If an external 1 pps input is applied, lock is maintained between the 1 pps input and 1 pps output with computer adjustable time constant from 8 minutes to 18 hours.Įach option board provides four 10 MHz, one 5 MHz and one 1 pps outputs. "On" when 1 pps output is synchronized within ☑ µs of 1 pps inputīlinks when RS-232 characters are received by FS725īlinks when RS-232 characters are sent by FS725Ġ to 5 VDC adjusts frequency by ☐.002 ppm (normally unconnected) "On" when frequency is locked to rubidiumīlinks with each 1 pps reference input applied to rear panel 10 MHz sine, 5 MHz sine, 1 pps pulse (10 µs wide)
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