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