Paragon-X Getting Started Guide
Page 24 of 28
1PPS/ToD/Frequency Converter (Revision C)
The Calnex external 1PPS/ToD/Frequency converter may be supplied as an option to the Paragon-X
(Opt. 133) or ordered separately.
Front View
Functions
Input
Output
Combined differential
1PPS+ToD serial signal
conversion to separate
1PPS TTL and ToD RS232
signals
RJ-45 connector (see port
1 pinout above).
Combined differential
(RS-422) 1PPS and ToD.
Normally connected to
slave clock output.
1PPS TTL (single-ended) pulse on RJ-45
connector (port 2) and ToD RS-232 signal on DB9
connector (port 6). Normally connected to
Paragon 1PPS and GPS inputs. Use crossover
(
null
modem cable) to connect ToD RS-232 cable from
accessory to Paragon.
Port 1 to Port 2 delay =
40ns
ToD serial signal conversion
from ToD RS232 signals
ToD RS-232 signal on DB9
connector (port 6)
RJ-45 connector (port 4), RS-422
1PPS TTL signal format
converter
RJ45 connector (port 3),
TTL high impedance
RJ-45 connector (port 4), RS-422 Port 3 to
Port 4 delay = 13ns
1PPS TTL signal connector
adapter
RJ45 connector (port 3),
TTL high impedance
BNC female connector (port 7), TTL 50Ω
Port 3 to Port 7 delay = 52ns
10MHz wander measurement
vs 10MHz reference on Paragon
10MHz on BNC female
connector (port 5).
2MHz on BNC female connector (port 8), which
tracks input 10MHz wander.
10MHz signal to 25MHz
conversion. Switch selectable.
10MHz on BNC female
connector (port 5).
25MHz on BNC female connector (port 8),
frequency locked to input.
25MHz signal to 10MHz
conversion. Switch selectable.
25MHz on BNC female
connector (port 5).
10MHz on BNC female connector (port 8),
frequency locked to input.
Additional reference frequency conversion ratios may be available, contact Calnex for more information.
