Rosendahl bonsaiDRIVE - Manual (Page 25)

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The internal Xtal oscillator can be calibrated to the external reference
signal in menu 22 CALIBRATE INTERNAL.
Resolution is 0,02 ppm.
If the machine is to be synchronised to house sync in play mode, set
the PLAYBACK SYNC REFERENCE to SYNC INPUT and connect
the house sync reference signal to input C3 (SYNC INPUT).
When no reference signal is present the status LEDs blink on the
remote panel.
Synchronising to an external house sync takes about 2 seconds in 2-
field and 8 seconds in 8-field mode, depending on the SYNC LOCK
MODE used.
The external synchronising video signal (house sync) should comply
with the broadcast specification (+/- 1 ppm, black & burst, line jitter
< 10 ns).
MENU 082 SYNC LOCK MODE
MENU 083 SC-H ADJUST
In a PAL composite video signal (FBAS) the phase between the
colour subcarrier (SC) and horizontal sync (H) repeats phase
coherence every 8 fields (SC-H phase).
If one sets the SYNC LOCK MODE to 8 FIELD the composite outputs
are phase correct to the house sync (and other equipment
synchronised with the house sync).
A phase adjustment in 1.8 degree steps can be carried out in menu
21, SC-H ADJUST.
If composite video signals are to be mixed it is necessary to
sync to the 8 field sequence. For all other uses one should set
SYNC LOCK MODE to 2 FIELD sequence.
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MENU 084 CALIBRATE INTERNAL
A composite video signal needs a very precise colour subcarrier
frequency. The tolerance lies in the under 10 ppm range.
With this menu it is possible to recalibrate the internal Xtal oscillator
for the PLAYBACK SYNC REFERENCE = INTERNAL mode.
For this one needs a very precise studio reference generator or a
clean video signal received from a public broadcaster (cable or
antenna).
(1) connect the reference signal to SYNC INPUT (C3).
(2) Set the PLAYBACK SYNC REFERENCE to SYNC INPUT.
Make certain that the recorder is in stable lock.
I.e. the key led stops blinking and is lit. A clean picture without colour
errors must now be visible on the composite output.
(3) Hold down the record key [REC] and then press [
◄ ]. In the
display the message "DONE" appears. The calibration used to
synchronise to the external sync signal is stored and used for the
PLAYBACK SYNC REFERENCE = INTERNAL mode.
Set the PLAYBACK SYNC REFERENCE back to INTERNAL and
check the composite output signal.
Do the above calibration only if colour is missing or colour errors are
seen on the composite video output in the PLAYBACK SYNC
REFERENCE = INTERNAL mode.
The external calibration has no effect on the record sync function or
other functions using external sync sources (SYNC INPUT).
Menu 099 SAVE AND POWER DOWN must be carried out to store
the new tuning non volatile to flash memory.