User Manual

Copyright 2012 Page 18
9600 baud and the lens will wait without timeout for an N command. Baud rate can be
adjusted using the Kbn command. All CORE commands described in Sections 5.1
through 5.1.18 are available for PanchroI lenses.
4.7.2 S4I Prime and CXX 15-40mm Zoom T2.0 Lenses
S4I lenses have two communications channels which send the same response to
both channels and can receive commands only from a single controlling channel. If
power is present on the external interface, the external interface takes precedence over
the camera interface and will have control. If only one interface supplies power, it will
be the controlling channel.
If the external interface has control, start-up will be at 115k2 baud and the standard
power-on prompt, “< [l/f ][c/r]”, is sent. If no N command is received within one second
the data rate is dropped to 9600 baud and a modified power-up string in sent, “+++<”.
This is a unique Bluetooth feature built into the S4I lens series only. The modified
power-up string doubles as both a Bluetooth initialization prompt, “+++”, and a
standard start-up prompt. Additional details on establishing a Bluetooth connection are
described in Appendix A.2. Baud rate can be adjusted using the Kbn command. All
CORE commands described in Sections 5.1 through 5.1.18 are available for S4I lenses.
4.7.3 5I Prime Lenses T1.4
All 5I lenses have two communications channels which can receive commands and
send responses independently. These channels can operate at different baud rates up
to 230.4K. Start-up baud rate is at 115k2 on both channels if an N command is received
within one second from either channel. If no N command is received within one second,
speed is dropped to 9600 baud on both channels and the lens will wait, without
timeout, for an N command from either channel.
There are two unique commands, (OX, OY), associated with 5I’s dual marked focus
ring. These allow the user to change the Start-Up units to imperial or metric and are
described in Section 5.3. See Section 6.2.2 for a more detailed description of the dual
marked focus ring.
5I lenses are equipped with a scale illumination feature not found on any other
lenses. The LED’s are driven using Pulse Width Modulation to vary the intensity.
Intensity settings can be controlled either by using the Aperture ring or a separate
Lighting Control Unit. Section 8.1 describes different methods for controlling the scale
illumination. Section 5.2 defines commands specific to 5I’s illumination feature.
Under normal operation, a 5I lens will receive commands to generate and then
send the requested data string to the camera interface, the external interface or both.