Sony HXC-100 Operating Instructions Manual page 123

Press the switch axially to output preview key signals from
the EXT I/O connector.
See the table "Iris adjustment functions" (page 54).
IRIS lever (RCP-920)
IRIS control knob
(RCP-921)
COARSE control knob
SENS control knob
Iris/master black control block (RCP-921)
f IRIS display
h MASTER BLACK display
e IRIS RELATIVE button
54
Location and Function of Parts
Iris adjustment functions
Relative mode
(IRIS RELATIVE button lit)
Adjusts the iris with relative values within 1/4 of
the total range from OPEN to CLOSED.
Adjusts the total range from OPEN to CLOSED
in relative values.
Does not function.
Press
CLOSE
Absolute mode
(IRIS RELATIVE button out)
Adjusts the iris within the variable range set by
the SENS and COARSE controls.
Sets the lower limit for CLOSED.
Sets the upper limit for OPEN, referenced to the
CLOSED value set by the COARSE control.
a EXT indicator
d IRIS/MB ACTIVE button
c AUTO button
i SENS control knob
b Spare button
j COARSE control knob
k IRIS control knob
l Iris gauge
m MASTER BLACK control knob
OPEN