Go to Contents Precise Time and Frequency, Inc., 50L Audubon Road, Wakefield, MA 01880, USA ptf 3207A rev G
Tel: +1-781-245-9090 e-mail: info@ptfinc.com www.ptfinc.com pg. 14
DB9 - ALARM Output
Contacts: Type C
High Z: Power off
High Z: Alarm (enabled alarm fault)
Low Z: Normal (no enabled alarm faults)
Drive: Relay contacts
Max. Voltage: 25 VDC
Max. Current: 50 mA
Quantity: 1
Connector: DB9
The ptf 3207A first synchronizes to IRIG-B-120 w/ IEEE1344 when the Time Quality control bits are =
0000. The ptf 3207A remains synchronized (Locked) while the Time Quality control bits are 0000
through 0101 (ETE < 10uSec).
The ptf 3207A remains synchronized (Locked) while the Time Quality control bits are 0000 through
0101 (ETE < 1uSec). The ptf 3207A uses the incoming local time offset information to convert the time
internally to receiver time, which is always UTC. Displayed time will be according to the local time
offset, DST etc. set internally on the system menu
Manual Leap Second Entry
The Manual Leap Second Entry is configurable via the Keypad / Display, RS232 and the Network
port via telnet and HTML. This function allows the user to enter leap second data. This mode of
operation will allow the user to maintain UTC with the ptf 3207A clock without an external time
reference providing leap second data or in a standalone mode (i.e. without a time reference).
Locked reference sources containing leap second data (GPS and IRIG-B w/ IEEE1344) take priority over
the manual leap second entry.
Manual leap second data is applied to the ptf 3207A UTC TOD when locked to any reference source
that does not contain leap second data.
The manual leap second data will be applied to the clock at the end of the current quarter that it was
entered at UTC midnight on the last day of June, or December
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