Inovonics 525N, Installation & User Manual

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Front-panel alarms and rear-panel tally outputs provide
local and remote indication of overmodulation, loss of
carrier and loss of program audio.
Supplied with a weatherproof, large-aperture loop an-
tenna.
MODEL 525N TECHNICAL SPECIFICATIONS
Receiver Topology:
Single-conversion superheterodyne;
300kHz IF; phase-locked I/Q synchronous
detector.
RF Inputs:
The 75-ohm (F) antenna input connects
to the supplied broadband loop antenna.
Cable is not included, but up to 100 feet
of general-purpose RG-6 CATV coax may
be used. A short wire antenna may
prove adequate in high-signal areas that
suffer minimal interference.
A 50-ohm (BNC) high-level input accepts
a direct RF sample between 1V and 7V
r.m.s. / 3V to 20V p-p.
Tuning Range:
Tunable via the front-panel menu or the
Web interface:
520kHz to 1720kHz in 10kHz steps
522kHz to 1719kHz in 9kHz steps
Five station-memory pushbutton/Web pre-
sets are provided.
Signal-to-Noise Performance:
(See Figure 1)
Measurement Bandwidth:
Carrier amplitude demodulation extends to
10kHz, ±0.2dB. Measurement is not af-
fected by the user-selectable audio cutoff.
Audio Response:
User-selectable “FLAT” response, or re-
stricted in programmable 1kHz steps be-
tween 10kHz and 2kHz. (See Figure 2)
De-Emphasis:
A menu command switches-in the NRSC
‘truncated’ 75µs de-emphasis characteristic
to the program audio outputs with any re-
stricted audio bandwidth selection. (See
Figure 3)
Audio Distortion:
Typically 0.15 THD at 50% carrier modula-
tion; <0.5% at 99% modulation.
Modulation Display:
The peak-responding front-panel bargraph
readout shows positive and negative mod-
ulation peaks simultaneously, with extend-
ed persistence of the most-recent-highest
peak value. Measurement resolution is 1%
between 50% and 100% (negative) and 50%
and 140% (positive) modulation, and 2% be-
tween 20% and 50% modulation.
RSSI/Noise Display:
The Modulation Display may be switched
to show the dBuV level of the incoming
carrier (RSSI) and a relative measurement
of asynchronous noise.
Peak Flashers:
Absolute-limit flashers are factory-
calibrated at –100% and +125% carrier
modulation.
A second set of flashers may be pro-
grammed by the user to values between
–70% and –100% and +70% and +140%.
Program Audio Outputs:
The active-balanced, rear-panel program
audio output (XLR) de4dBu from
a 200-ohm resistive source.
Front-panel headphone jack (¼-inch,
TRS).
Alarms:
Open-collector NPN transistor outputs
(screw-terminal block) for low signal, pro-
gram audio loss and overmodulation. Clo-
sure polarity is programmable.
Web Interface:
RJ45 jack for remote setup and opera-
tion via TCP/IP; DHCP or Static IP with
local or remote selection.
Remote Web-based monitoring of off-air
audio.
Comprehensive network configuration
utility including dynamic DNS and full
SNMP support with downloadable MIB
file.
Supports email and text message ser-
vices with or without SSL.
Power Requirements:
105–130VAC (0.250A Fuse)
210–255VAC (0.125A Fuse)
50/60Hz; 10W.
Size and Weight:
1¾”H x 19”W x 7”D (1U);
9 lbs. (shipping).