Technical data

Installation & Operation Manual GM-TTT
Page 58
4.2 Genlock to a LTC Source
• Connect a LTC signal to XLR3F LTC IN.
• At menu SET - ... - LOCK select LTC and press enter button.
• Press genlock button.
The LED genlock lights up if genlock is operating normally. The LED flashes if the genlock
signal is disturbed and the internal reference is currently selected. If the genlock signal returns
to be ok the LED will light up again. The LTC output gets a frequency and phase adjustment to
this genlock source. Within a ½ bit accuracy the phase of the output corresponds to the input.
GM-TTT permanently measures the timing of the LTC source. If the frequency does not fall
within the specified range (see chapter “Connections at the Rear and Technical Data”), the unit
switches to internal reference. Furthermore the unit adjusts its internal reference to the LTC
source, so in case of a failure the LTC output stays at the last frequency and no disturbance of
the output signal occurs. The current programming of the internal reference is displayed at
menu STATUS - ... - 3.
GM-TTT permanently supervises the genlock source. An error counter increments in case of
any faults, this counter is displayed at menu STATUS - ... - 4. Another error counter increments
in case of a failure, this counter is displayed at menu STATUS - ... - 5. Another error counter
increments in case of a disturbance, this counter is displayed at menu STATUS - ... - 6. The
error counters get an update each frame. Each time the genlock button is pressed the error
counters get a reset to zero.