Q.series
Gantner Instruments GmbH
41
4 Connecting the modules → Synchronization of several systems
only depends on the response times in your network, but here too
it might amount to several milliseconds.
Configuration of the relevant method
takes place using the
test.commander program, see Section 5.8.3.3, Synchr
onization,
page 123. If you combine several synchronization methods, the
best possible one is always used from those available:
1. Hardware synchronization (synchronization of the Q.series,
Et
herCAT, IRIG-B or AFNOR using a time signal, e.g. DCF77)
2. Time signal from GPS (NMEA-0183)
3. SNTP
4.5.1 Connection of a radio receiver for time signals
Depending on the output signal of your receiver you basically
have two methods:
1. The receiver, e.g. for DCF77, is connected to the digital IOs of
the Q
.pac Test Controller (plug-in terminal 1, connections 1
and 2; refer to Section 4.4.2, page 32). The variant is suitable
if the receiver outputs signals at a TTL level.
2. The receiver is connected through the sync input (plug-in ter-
minal 2, connections 9 and 10; refer to Section 4.4.2,
page 32). The variant is only possible when the receiver has
an RS-485 interface, because the sync input uses this inter-
face.
The configuration is carried o
u
t using the program test.com-
mander and the menu Settings > Synchronization > Sync.
settings. Prot
ocol; refer to Section 5.8.3.3, page 123.
4.5.2 Connection of a GPS receiver
NMEA-compatible GPS receivers normally have a serial interface
and are therefore connected through RS-232 to the Test Con-
troller. With Q.gate the RS-232 input at the front is used and with
Q.
pac the RS-232 input on the top side (next to the Ethernet con-
nection).
The configuration is carried ou
t using the program test.com-
mander and the menu Settings > Synchronization > Sync.
settings. Prot
ocol; refer also to Section 5.8.3.3, page 123.
Use the variable GetPositioningData to evaluate the individual
data items of your GPS receiver.
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