Meinberg TCG510 - Manual (Page 13)

13
Serial configuration of the board
If the serial configuration feature of TGV510 shall be used, the DIL-Switch settings for
the time code can be disabled using SW1-10. The output of serial timestring via TxD line
of COM0 is disabled if serial configuration is selected.
SW1-10 Configuration
On Dip-Switch, manual configuration
Off EEPROM, serial via RS232
Outputs
The module TGV510 provides modulated and unmodulated (DC-Level Shift) outputs.
The format of the timecodes is illustrated on pages 6 and 7
AM-sine wave-outputs
The amplitude-modulated carrier is available at the VG-connector pin 28c and four RF-
connectors (BNC in the frontpanel or SMB on the board). The carrier frequency depends
on the code and has a value of 10 kHz (IRIG-A) or 1 kHz (IRIG-B). The signal
amplitude is 3V
pp
(MARK) and 1V
pp
(SPACE) into 50
Ω
. The encoding is made by the
number of MARK-amplitudes during ten carrier waves. The following agreements are
valid:
a) binary"0" : 2 MARK-amplitudes, 8 SPACE-amplitudes
b) binary"1" : 5 MARK-amplitudes, 5 SPACE-amplitudes
c) position-identifier : 8 MARK-amplitudes, 2 SPACE-amplitudes
PWM-DC-outputs
The pulse width modulated DC-signals shown on pages 6 and 7 are coexistent to the
modulated output. The described time frames are valid for encoding a binary "0" or "1"
and the "position-identifiers". The following signal levels are available at the VG-
connector:
a) TTL int 50
Ω
, high- und low-active
b) RS232, high- und low-active
c) RS422
d) open drain transistor-output