Modular Multitrack Recorder - Tascam
Modular Multitrack Recorder - Tascam
Modular Multitrack Recorder - Tascam
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On older film transports that use a tach and a direction signal, the phase A connection comes from the<br />
direction signal and the phase B connection comes from the tachometer output. Setup Menu 302 allows<br />
the default setting (which is biphase) to be changed to tach+direction. If the transport controls seem to be<br />
“backwards” (i.e. Play runs the film in reverse), select the tach+inverse direction choice from Setup Menu<br />
302.<br />
Both menus 301 and 302 are used to set the MMR-8 as a slave to the biphase device (where the MMR-8<br />
will be generating time code or feet & frame numbers off the biphase signal from the film transport).<br />
Using the MMR-8 in this way requires that the Biphase Chase operating mode be selected and that the<br />
MMR-8 be placed online (the online button is lit up).<br />
The MMR-8 As Master<br />
In many applications it’s desirable to have the MMR-8 function as the master in order to allow remote<br />
control of the film transport (either from the MMR-8’s front panel motion controls or from a Lynx<br />
controller or a KCU). Built into the MMR-8 are biphase and tach+direction signal generators that can<br />
supply the correct motion control signals for most biphase devices allowing controlled film acceleration<br />
and fast wind speeds (which are adjustable parameters set through the 300 bank Setup Menus).<br />
When the MMR-8 will be the master, and the film transport will be the slave, the Biphase Transport<br />
operating mode is used. In this mode the biphase signal from the MMR-8 is used to generate control<br />
signals for the film transport as well as create the time code for running the MMR-8 and other audio<br />
devices. Once this operating mode is selected the various 300 bank Setup Menu parameters for the film<br />
transport should be checked to ensure they are set for the model of film transport used in the system.<br />
These settings can then be saved to a User Settings file for re-use in a future session.<br />
Biphase Setup Menus<br />
Once the biphase operating mode is selected, the 300 bank Setup Menus (Table 5.2) can be used to verify<br />
and set the parameters for the specific film transport being used with the MMR-8. For most applications,<br />
the acceleration (Menu 320) and fast wind speed (Menu 321) defaults can be used since they correspond<br />
to the pulse rate selection (Menu 301). Thus, if they must be changed, they must be changed after the<br />
pulse rate has been set, otherwise they will be changed back to the default setting for the new pulse rate.<br />
80<br />
300 Menu Item Selection Choices<br />
300 Biphase Frame Rate film frame rate 24, 25, 30 fps<br />
301 Biphase Pulse Rate pulses per frame 2, 4, 10, 20, 25, 50, 100 ppf<br />
302 Biphase I/O biphase or tach+direction Biphase, Tach+Direction,<br />
Tach+Inverse Direction<br />
320 Biphase<br />
Acceleration<br />
321 Biphase Maximum<br />
Wind Speed<br />
Table 5.2 Biphase Setup Menus<br />
film acceleration (ramp up<br />
time from stop to fast wind)<br />
4 up to 32 times (follows pulse<br />
rate choice)<br />
fast wind speed setting 1x play up to 20x play speed<br />
(follows the pulse rate choice)<br />
<strong>Tascam</strong> MMR-8 Owner’s Manual • Chapter 5 • MMR-8 System Applications MMR-8
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