VARIZOOM VZ-WFF Instruction Manual - page 11
Either one may be used for connection to an
external 11 to 17VDC power source. If two WFF’s
are being used and only one power source exists,
plug the second Receiver/Amplifier’s cable into the
unused power connector on the first one. Pin 1 is
positive, pin 2 is negative.
DATA IN
Connector: This 3-pin connector is provided to allow
direct connection of the Transmitter and the
Receiver/Amplifier unit. When connected, the RF
sections in both the transmitter and receiver are
switched off and the serial data is sent via a cable.
Pin 1 is ground, pin 2 is the RF shutdown line that
must be connected to pin 1 in the cable, and pin 3 is
the serial data input line.
MTR
Connector: The 5-pin motor connector is used to connect the
Receiver/Amplifier to a lens drive motor. The pin
assignments are 1-for-1 compatible with Seitz and
WRC-4 systems and Heden and Cinema Products
motors.
POT
Connector: This 4-pin connector is provided to allow
direct connection of a 10K control potentiometer
to be used instead of the transmitter. This way, a
very small control knob may be placed anywhere
convenient for the operator. When used this way,
the Receiver/Amplifier becomes a direct analog
servo control system (like a Preston “Micro Force”).
pg. 14
Receiver/Amplifier Controls
ON/OFF
Switch: This switch controls power to the
Receiver/Amplifier.
CHANNEL
Select Switch: This switch is used to select one of the
eight frequencies in the 900 MHZ range for
operation. The selector switch must be set to the
same channel on both the Transmitter and
Receiver/Amplifier. As a general rule, use the
highest number that works in order to minimize
interference from video transmitters.
If two WFF
units are being used at once, leave at least one
unused channel between the two channels being
used, i.e. do not set the units on adjacent
channels, such as 5 & 6! Also, do not use
channels 3 & 7 simultaneously, as you may get
interference.
CALIBRATION
Switch and Thumbwheels: These controls, located
on the side of the Receiver/Amplifier, are used to set
the end points of travel of the lens drive motor that
correspond to the range of travel of the Control
Knob on the Transmitter. See following page for the
calibration procedure.
pg. 11