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2.8 CONNECTING THE TIMECODE READERS
INSTALLATION
The generator code output should be connected to the record input of the
time code channel or audio track 2 of your video recorder. (Audio track 3
for 1" VTR's) Pin 1 of the XLR is ground, and pins 2 and 3 provide a
balanced output. When using a machine with an unbalanced input the
signal should be connected to Pin 3 of the generator output XLR. Pin 2
should be left open. The GEN ASSIGN item of the TIMECODE menu is
used to set up the operational mode of the LTC and VITC generators. (See
section 3.3.1). The Codes and Outputs tabs of the configuration screens in
the KeyLog TRACKER™ software also control the use of the LTC and
VITC generator.
When using KeyKode / edge number information in the user bits of LTC, the
time code generator built into the VTR should be set to the "EXTERNAL
DIRECT" mode of operation.
understand the counting sequences of the encoded data, and will introduce
delays and possibly errors in the user bit data if it attempts to regenerate the
timecode before recording it on tape. (See section 3.9.1)
The 4025TR is equipped with an LTC and VITC time code reader which
are used to slave the Video generators in the 4025TR to time code
generated by the VTR's internal generator. It is also used to bring in the
audio time code when audio is synced during the transfer. The function of
the Timecode Readers is controlled by the RDR MAPPING item on the
TIMECODE menu (See section 3.3.5).
controlled using the Codes tab of the Configuration screen in K
TRACKER™.
2.8.1
Connecting the VITC reader
The reader input video with VITC recorded on it is connected to the VITC
IN loop. The video input circuitry has a high impedance input tapped off
the loop; therefore, the video signal must be properly terminated at the end
of the line. This may come from the video output of the VTR you are
recording on to, or from a LTC to VITC translator such as the Evertz
S621D-LTR to input production audio timecode as shown in Figure 2-6.
2.8.2
Connecting the LTC Reader
Connect the LTC output from your audio or video recorder to the LTC IN
XLR connector. When using an unbalanced input to the reader, the signal
should be applied to pin 3 of the reader input connector. Normally, the
unused input, (pin 2) should be connected to ground (pin 1).
Model 4025TR Film Footage Encoder Manual
The VTR's time code generator does not
The reader function is also
Page 2-12
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