Uniblitz VMM-T1, Руководство пользователя

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VMM-T1 User Manual 23
Operating Basics
Please refer to the section describing the “ Initial Operation and Testing ” for initial preparation to put
the V MM-T1 into operation.
Function Switches
There are 5 sub-miniature slide switches located on the Rear Panel and labeled “FUNCTION”.
1. Switches A – D allow the user to select the active state of the four BNC inputs.
a. When the switch actuators are in the DOWN position the corresponding BNC input will be
TTL active-low. This indicates that a logic “0” (0 volts) will activate the selected input.
The
switches must be in the active-low position to activate the inputs from a remote activate
cable such as the 710R (handheld) or the 710R/F (foot activated).
b. In the UP position the selected BNC input will become TTL active-high. This indicates that
logic “1” (+5 volts) will activate the selected input.
2. Switch E selects HIGH/LOW pulse energy.
a. HIGH energy is required to operate 35mm and larger aperture shutters.
b. In the DOWN position the pulse energy is selected LOW.
c. When the switch actuator is in the UP position the pulse energy is selected HIGH.
Gate Input
The GATE INPUT BNC is used in conjunction with the TRIGGER INPUT BNC. This allows the user
to select one or a finite number of trigger pulses to trigger the controller from a continuous stream of
pulses presented at the TRIGGER INPUT. Please see Figure 4. The following description assumes the
GATE INPUT is selected active-high (FUNCTION switch “D” in the UP position) and the TRIGGER
INPUT is selected to the active-low state (FUNCTION switch “A” in the DOWN position).
When a stream of trigger pulses is sent to the TRIGGER INPUT and the GATE INPUT is in the HIGH
state (TTL logic “1”, +5V), the
VMM-T1 will operate as described in the “OPERATOR CONTROLS”
section.
Once the GATE INPUT changes to the TTL LOW state (TTL logic “0”, 0V), all trigger signals being
sent to the TRIGGER INPUT are disabled.
The HIGH energy setting must be used for only 35 mm and larger
aperture shutters. Use the LOW setting for all other
UNIBLITZ
shutters.
Use of the HIGH position for shutter apertures smaller than 35mm could
cause irreparable damage to the shutter used and will void the shutter’s
warranty.
CAUTION