— 5 —
The Front-Panel Display and Menu Knob
The front-panel
MENU
knob scrolls the LCD through the
various viewing and programming options. Section III of
this manual covers the easy setup and programming in-
structions.
Headphone Jack
The front-panel mini-phone jack will accommodate stereo
headphones of virtually any impedance with a 3.5mm stereo
plug. When headphones are plugged in, the LCD menu will
automatically switch to the
HEADPHONE VOL
screen where
you can adjust listening volume with the knob. Once you
have set the volume to a comfortable level, push the knob
to return to the previous menu.
Rear Panel Connections
ANTENNA
The rear-panel ‘F’ connector is a 50-
ohm antenna input. See
Antenna Con-
siderations
on the previous page.
G +5 L A
These are alarm “tally” outputs for re-
mote indication of reception problems.
Designations are noted on the rear pan-
el and stand for Ground, +5 DC volts,
Low Signal and Audio Loss.
The two alarm outputs are the collec-
tors of NPN transistors that saturate to
ground. The output polarity is pro-
grammable for either a ground or an
open circuit for an alarm condition.
These outputs can sink up to 100mA to
operate relays or LED indicators using
an external voltage source up to
24VDC, which must be returned to the
G
(Ground) terminal. The +5VDC sup-
plied on the
+5
terminal is current-
limited with a 100-ohm series resistor
and suitable only for optical couplers,
LED indicators or small reed relays.
The plastic connector body may be un-
plugged from the chassis to make con-
nection easier and for quick disconnect.
— 6 —
ANALOG LINE
OUTPUTS L/R
The active-balanced analog line outputs
are marked
LEFT
and
RIGHT
, but are in
fact dual
monaural
outputs. These
outputs have a 200-ohm source imped-
ance and provide a program level that
may be adjusted between –15dBu and
+15dBu, corresponding to 100% AM
carrier modulation.
AES DIGITAL
AUDIO OUTPUT
The balanced, transformer-isolated AES
digital audio output has a sample rate
of 44.1kHz. The audio level may be ad-
justed between –30dBFS and 0dBFS,
corresponding to 100% AM carrier
modulation.
+12VDC
POWER I/O
Two paralleled coaxial power connect-
ers allow ‘daisy-chaining’ INOmini
modules. This allows one DC supply to
power up to three modules mounted in
a single rack adapter, provided that the
rating of the supply is not exceeded.
Two short ‘pigtail’ cables are provided
with each rack adapter.
The INOmini 674 draws 275mA. Check
the rating on the label of the power
supply to make sure it has sufficient
capacity for all modules it must sup-
port.
These power connectors are not a lock-
ing type, and the mating plugs pull out
rather easily. A Ty-Wrap® will secure
the cables to the plastic anchor above
the jacks.
