TABLE OF CONTENTS
seconds to the nearest power of two. For the TYMSERVE this field is set to -19 which is the
value closest to the 1 μsec precision of the TYMSERVE.
Synchronizing Distance (Root Distance Version 3): This is a 32-bit fixed-point number
indicating the estimated roundtrip delay to the primary synchronizing source, in seconds, with
fraction point between bits 15 and 16. Set to 0 in the TYMSERVE.
Synchronizing Dispersion (Root Dispersion Version 3): Synchronizing Dispersion is a 32-bit
fixed-point number indicating the estimated dispersion to the primary synchronizing source, in
seconds. Root Dispersion indicates the maximum error relative to the primary reference source.
Currently set to 0 in the TYMSERVE.
Reference Clock Identifier: This is a 32-bit code identifying the particular reference clock. In
the case of stratum 1 (primary reference), this is a four-octet, left justified, zero-padded ASCII
string. For the TYMSERVE the four-octet string is dependent on the time source selected as
follows:
Time Source Four-octet String
GPS 'GPS'
IRIG B Time Code 'IRIG'
Free Running Clock 'FREE'
Ext. 1 PPS Input '1PPS'
NIST ACTS 'NIST'
Reference Timestamp: This is the local time at which the local clock was last set or corrected,
in 64-bit timestamp format. With the TYMSERVE the Reference Timestamp is the last time that
a valid timing signal was detected. Therefore, the Reference Timestamp will indicate the time at
which the timing signal was lost. When the timing signal returns, the Reference Timestamp will
be updated.
Originate Timestamp: This is the local time at which the request departed the client host for
the service host, in 64-bit timestamp format.
Receive Timestamp: This is the local time at which the request arrived at the service host, in
64-bit timestamp format.
Transmit Timestamp: This is the local time at which the reply departed the service host for the
client host, in 64-bit timestamp format.
Authenticator: This field contains 4 bytes of key identifier followed by 16 bytes of MD5 digest.
The data is validated when authentication is enabled.
TYMSERVE 2000 Manual Datum Inc, Bancomm Div.
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