Revision F • 3/12
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2-5
2 Hardware Installation
HD Radio Exciter is remotely located, a 10 MHz
GPS reference at the Exciter is
strongly recom-
mended.
Under some conditions a GPS reference at the
Exciter may not be essential. Exporter Reference
mode is used for this implementation. Ethernet
performance can have great variability, conse-
quently this method may not be sufficiently reli-
able. The packet jitter performance, or perfor-
mance of your particular Ethernet connection to
the Exciter, will determine the reliability of Ex-
porter Reference operations. Please consult your
Exciter’s documentation for more information.
A Trimble Bullet III GPS antenna, with type-F
connector, is supplied with the HDE-200. Up to
75 feet of customer-supplied RG-58 (50 ohm coax)
or RG-59 (75-ohm coax) cable can connect it to
the
GPS Antenna input. The GPS input uses a
type-F connector for easy installation.
An existing GPS antenna, like the Panasonic
VIC-100 supplied with other Harris products, can
alternately be used. An existing VIC-100 cable
would have to use a TNC-to-F adapter or a type-F
connector would have to be crimped onto the cable
in order to connect it to the HDE-200.
Other GPS antennas may work with the HDE-
200, but they must use +5 VDC for power (many
GPS antennas use +3.3 VDC). Their gain specifi-
cations must at least equal the Bullet III antenna.
When a GPS antenna is powered by another
device, an in-line DC-block or a DC-blocking power
divider should be used to connect the antenna
cable to the HDE-200’s GPS input. Note that the
+5 volt supply for the GPS antenna is only cur-
rent protected against momentary shorts.
NOTE:
If the HDE-200 is not locked
onto the GPS satellites a
GPS Unlock
,
an ECC app alarm, and a remote logic
status tally (
Critical Fault) are acti-
vated until GPS lock is obtained.
2.3.3 AUDIO CONNECTIONS
All audio wiring to/from the HDE-200 is AES/
EBU digital (AES-3). Each audio connector
(3-pin, XLR-type) uses this pinout:
The digital inputs (
Main Delay In and MPS
Audio In) accept AES-3 compatible signals using
sample rates from 32 to 96 kHz. Each 110 ohm
input is transformer coupled, which feeds a sample
rate converter that converts the signal to the HDE-
200’s internal sample rate of 44.1 kHz.
For most applications, connect the processed
audio source for the analog broadcast to the
Main
Delay In connector. Connect the processed audio
source for the HD Radio main channel to the
MPS
Audio In connector.
If there is only one processed audio signal to
feed both the analog and digital Exciters, connect
that signal to
Main Delay In. You must then use
the ECC app to change the HDE-200 to use only
the
Main Delay In connector (otherwise there will
be an
Audio Fault indication). The input option is
set in the
System > Other Controls
pop-up win-
dow by clicking the
Main Only option.
The two digital outputs (
Main Delay Out and
Ref Mon Out) are transformer-coupled AES-3 com-
patible signals using a 44.1 kHz sample rate.
Main Delay Out is the analog broadcast signal
with Diversity Delay (and PPM Encoder signals
when the optional PPM interface kit is installed).
This signal connects directly to the analog broad-
cast Exciter or to a digital STL to feed the analog
transmission chain.
Ref Mon Out can connect to a local rackmount
digital monitor speaker, like the Fostex RM-2 or
to a pair of powered digital input speakers like
AES/EBU Digital Inputs & Outputs
Pin Signal Description
1
Shield (connects directly to the chassis)
2
High (+), typically a red or blue wire
3
Low (-), typically a black or white wire
