5.2 Pulse outputs
The pulse generator of the satellite controlled clock GNS165 containes three independant channels and is able
to generate a multitude of different pulses, which are configured with the software "Meinberg Device Manager".
The active state of each channel is invertible, the pulse duration settable between 10 msec and 10sec in steps of
10 msec. In the default mode of operation the pulse outputs are disabled unti the the receiver has synchronized
after power-up. However, you can configure the assembly group to enable the ports immediately after switching
on. The pulse outputs are electrically insulated by optocouplers or PhotoMOS relays and are available at the
-X1-Interface (DMC-Connector).
The following modes can be configured for each channel independently:
Timer mode:
Three on- and off-times per day per channel programmable
Cyclic mode:
Generation of peropdically repeated pulses.
A cycle time of two seconds would generate a pulse at
0:00:00, 0:00:02, 0:00:04 etc.
DCF77-Simulation
mode:
The corresponding output simulates the DCF77 time telegram.
The time marks are representing the local time as configured by the user.
Single Shot Mode:
A single pulse of programmable length is generated once a day at a
programmable point of time
Per Sec.
Per Min.
Per Hr. modes:
Pulses each second, minute or hour
Status:
One of three status messages can be emitted:
’position OK’:
The output is switched on if the receiver was able to
compute its position
’time sync’:
The output is switched on if the internal timing is
synchronous to the GNS165-system
’all sync’:
Logical AND of the above status messages.
The output is active if position is calculated AND the
timing is synchronized
Time code
The un-modulated IRIG or AFNOR signal of the built in time code generator
is made available at the respective output.
Idle-mode:
The output is inactive.
Synthesizer:
Frequency output 0 Hz to 10 MHz
5.3 Asynchronous Serial Ports
One RS-485 serial interface and two asynchronous serial interface (RS-232) are available to the user. In
the default mode of operation, the serial outputs are disabeled until the receiver has synchonized after power
up. However, the system can be configured to enable those outputs immediately after power-up. Transmission
speeds, framings and the kind of the time string can be configured separately. The serial ports are sending a
time string either once per second, once per minute or on request with ASCII "?" only. The format of the output
strings is ASCII, see the technical specifications for details. The corresponding parameters can be set up by
the program "Meinberg Device Manager" using serial port COM0.
18
Date: 19th January 2021
GNS165DHS / GNS165DAHS