7.5 Display String
The string is a sequence of 62 ASCII characters containing the frequency F, the frequency deviation FD, the
REF Time, the Power Line Time PL Time and the Time Deviation TD, separated by a space character each. The
string ends with the characters Carriage Return (ASCII code 0Dh) and Line Feed (ASCII code 0Ah). The let-
ters displayed in italics are replaced by the calculated values whereas the other characters are part of the string:
F:
49.984
_FD:
-00.016
_REF:
15:03:30
_PLT:
15:03:30.378
_TD:
+00.378
<CR><LF>
The meaning of the string fields and values is as follows:
F:49.984
The measured Power Line Frequency with a resolution of 1 mHz
FD:-00.016
The Frequency Deviation between calculated and nominal frequency,
with sign character (+/-), resolution: 1 mHz, maximum: +-09.999 Hz
REF:15:03:30
The Reference Time from the upstream clock (hours:minutes:seconds)
PLT:15:03:30.378
The Power Line Time, based on the Power Line Frequency,
(hours:minutes:seconds.milliseconds)
Time adjustments such as Daylight Saving Time or leap seconds
will not be accounted for by the PL Time!
TD:+00.378
The Time Deviation between REF Time and PL Time, signed value (+/-),
resolution: 1 ms, maximum: +-999.999 s
7.6 Technical Specifications FDM
Input Signals:
10 MHz oscillator clock (TTL level)
Pulse per second, activ high (TTL level)
Serial time string (RS-232 or USB), Meinberg Standard Time String or
Uni-Erlangen Time String
Mains voltage: 70 V... 270 V, 30 Hz ... 80 Hz, 2.5 VA max.
Accuracy of
Measurement:
Frequency:
accuracy of reference (10 MHz) +-1 mHz
Time deviation: accuracy of reference (PPS) +-1 ms
26
Date: March 1, 2022
LANTIME
