Broadcast Electronics AM-2.5E, User Manual

Page: 16 / 320

1-7
TABLE 1-1. ELECTRICAL CHARACTERISTICS
(Sheet 3 of 5)
PARAMETER SPECIFICATION
AUDIO INPUT IMPEDANCE 600 Ohms. Inputs are balanced, transformerless,
and resistive with passive RFI filtering. Other
impedances can be accommodated.
AUDIO FREQUENCY
±
0.5 dB, 20 Hz to 10 kHz at 90% negative
RESPONSE (MONOPHONIC) modulation (linear phase mode). +0.1 dB
-3 dB, 20 Hz to 10 kHz at 90% negative
modulation, standard configuration.
AUDIO HARMONIC DISTORTION
Mono Less than 0.8%, 20 Hz to 10 kHz at rated power.
Less than 1.5%, 20 Hz to 10 kHz at 50% power.
Less than 2.0%, 20 Hz to 10 kHz at 25% power.
Less than 3.0%, 20 Hz to 10 kHz at 10% power.
All mono audio harmonic distortion specifications
are referenced to an audio input level which
generates 90% modulation at 1 kHz (9 dBm).
Stereo Less than 1.5% at 50% single channel
modulation, 50 Hz to 10 kHz at rated power.
INTERMODULATION DISTORTION 1.2% or less at 1:1 ratio. 1.7% or less at 4:1 ratio.
(MONO) 60/7000 Hz SMPTE standards with 85%
modulation at rated power.
CCIF INTERMODULATION 1.0% or less at 1:1 ratio. 4 kHz/5 kHz with 85%
DISTORTION (MONO) modulation at rated power.
TRANSIENT INTERMODULATION 1.0% or less at 4:1 ratio. 2.96 kHz square wave
DISTORTION (MONO) 8 kHz sinewave with 85% modulation at rated
power.
INCIDENTAL PHASE Less than 2.0 degrees (0.035 radians) average or 30
MODULATION dB (40 dB typical) below equivalent 100% L-R
(STEREOPHONIC) C-QUAM modulation, 50 Hz to 10 kHz at rated
power. Measured with an audio input level which
generates 95% negative L+R envelope modulation
at 1 kHz (9.5 dBm).
STEREO SEPARATION -30 dB or greater, 50 Hz to 10 kHz. Measured
with 50% single channel modulation into a 50 ohm
resistive load at rated power.
SQUAREWAVE OVERSHOOT
Mono 0.1% or less at 400 Hz, 90% modulation with high
frequency boost disabled.
Stereo 1.0% or less at 400 Hz, 50% single channel modu-
lation with high frequency boost disabled.