— 5 —
mains voltage. As the actual power consumed by the re-
ceiver is 180mA at 12 volts DC, a second DC connector on
the rear panel of the 632 allows the user to ‘daisy-chain’
INO
mini
modules. This means that two or more units may
be fed from the same AC supply, but with the caution that
the total input power specification of a given assortment of
INO
mini
modules must not exceed the current rating noted
on the power supply label.
Radio Frequency Interference (RFI)
Although we have anticipated that the 632 receiver will be
used in the immediate proximity of broadcast transmission
equipment, please do practice reasonable care in locating
the unit away from abnormally high RF fields. The LCD
screen should not light up when the unit is unplugged!
The Front-Panel Display and Jog Wheel
The front-panel
MENU
jog wheel scrolls the LCD through
the various viewing and programming options. Please refer
to Section III of this manual for easy menu setup (receiver
programming) instructions.
Headphone Jack
The front-panel
PHONES
jack will accommodate any set of
stereo headphones or horrid earbuds of virtually any im-
pedance with an eighth-inch stereo plug. When headphones
are plugged in, the LCD menu will automatically go to the
HEADPHONE VOL
screen, and the jog wheel knob will adjust
the listening volume. When the volume has been set at a
comfortable level, push the knob to re-enter the menu selec-
tion mode.
Rear Panel Connections
ANTENNA
The rear-panel ‘F’ connector should be
connected to a good outdoor FM anten-
na for best reception. This is particu-
larly important for reception in the HD
Radio mode, as the digital signal power
level is substantially below that of the
main FM carrier.
G C D A
These are alarm “tally” outputs for re-
mote indication of reception problems.
— 6 —
Designations are also noted on the rear
panel and stand for Ground, Carrier
Loss, Digital Loss and Audio Loss.
The three alarm outputs are the collec-
tors of NPN transistors that saturate to
ground for an alarm condition. Up to
100mA may be ‘sunk’ by each of these
outputs to operate relays or LED indica-
tors using an external voltage source,
which must be returned to the
G
(Ground) terminal.
The plastic connector body may be un-
plugged from the chassis to make con-
nection easier and for quick disconnect.
AES DIGITAL
AUDIO OUTPUT
The balanced, transformer-isolated AES
digital audio output has a fixed sam-
pling rate of 44.1kHz, a rate that is
common to most devices associated
with HD Radio installations.
ANALOG LINE
OUTPUTS L/R
The active-balanced analog line outputs
provide a program level of +4dBm at
100% FM carrier and 0dBFS HD Radio
modulation.
+12VDC
POWER I/O
These two parallel connecters allow
‘daisy-chaining’
INO
mini
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.
The Model 632 receiver draws 180mA.
Check the rating on the label of the
power supply to make sure it has
enough oomph for the modules it must
power.
