Title: SPEC, ZX TRANSMITTER FAMILY Sheet 4 of 7 Rev: B Dwg: 817-2350-085
ZX2500: < 73 dBA (65 dBA)
ZX3750: < 73 dBA (65 dBA)
ZX5000: < 73 dBA (65 dBA)
ZX7.5: < 73 dBA (65 dBA)
ZX10: < 73 dBA (65 dBA)
REMOTE CONTROL
Parallel remote: D-sub 25 female.
Status: open collector, 24 V @ 500 mA max.
Command: active low with internal pull-up.
Telemetry: 0 - 2 V, 2k source impedance.
Security: RF mute and external interlock lines.
ZX7.5, ZX10: D-sub 25 female to each amp chassis and D-
sub 9 with screw terminal breakout for system.
Ethernet (optional): RJ45, twisted pair.
COMPLIANCE
RoHS 2002/95/EC compliant: Yes.
R&TTE 1999/5/EC compliant: Yes.
STEREO PERFORMANCE with Digital Input Module
Input data format: AES3-1992 (reference standards: AES5-
1984, ANSI S4.28-1984, AES3-1985, ANSI S4.40-1992,
and AES3-1992).
Sample rate: Any in range 32 kHz to 56 kHz (32, 44.1 or
48kHz typically output from AES3 devices).
Digital stereo generator: Complete digital composite stereo
waveform generated in digital domain from incoming AES3
stereo audio data using a digital signal processor (DSP).
Digital baseband composite limiting: DSP “lookahead”
techniques for control of peaks before overmodulation can
occur. Active with on-board DSP stereo generator in stereo
or monaural mode; pilot carrier and SCA signals unaffected.
Limiter on/off and limit setting adjustable from 0 - 18 dB
either locally or by standard remote control systems.
Pre-emphasis: 0, 25, 50, or 75 ȝs, locally selectable.
Stereo separation (sine wave): 65 dB or greater, 10 Hz to 15
kHz.
Dynamic stereo separation (complex waveform): 55 dB or
greater, 10 Hz to 15 kHz.
Amplitude response (L or R): 10 Hz to 15 kHz +/- 0.2 dB
referenced to selected pre-emphasis curve.
FM signal to noise ratio (L or R): 83 dB below 100%
modulation at 400 Hz; measured in DC to 22 kHz
bandwidth with 75 ȝs de-emphasis and DIN “A” weighting.
Does not exhibit the subsonic noise associated with analog
exciters.
Stereo harmonic distortion: 0.005% or less for any
modulating frequency from 10 Hz to 15 kHz, measured in
DC to 22 kHz bandwidth with 75 ȝs de-emphasis.
Intermodulation distortion (L or R): CCIF: 0.02% (14/15
kHz 1:1); SMPTE: 0.025% (60/7000 Hz 1:1).
Transient intermodulation distortion (DIM) (L or R):
0.005% (2.96 kHz square wave / 14 kHz sine wave
modulation).
Linear crosstalk: L+R to L-R and L-R to L+R due to
amplitude and phase matching of L&R channels (DC - 15
kHz): 85 dB below 100% modulation reference.
Non-linear crosstalk: L+R to L-R and L-R to L+R due to
distortion products: 75 dB below 100% modulation
reference, DC - 15 kHz.
RBDS/RDS synchronizing signal: 19 kHz quasi-sine wave,
nominal 5.6 V p-p, AC coupled, 100 ohm output impedance
(unbalanced); for use by customer-supplied, external
generator. BNC female connector.
Stereo / monaural mode control: Selectable locally or by
standard remote control systems. Zero amplitude pilot in
monaural mode.
Emergency analog composite mode: Switchable locally or by
standard remote control systems to mute on-board DSP
stereo generator and accept analog composite stereo on
SCA Port #2. Nominal input sensitivity (all SCA ports in
this mode): 3.5 V p-p (1.24 V rms) for +/- 75 kHz
deviation. FM signal to noise ratio: 85 dB below 100%
modulation. Total composite harmonic distortion: 0.02%.
COMPOSITE INPUT PERFORMANCE with Analog Input
Module
Inputs: Two: XLR female balanced (switchable, composite, or
monaural), and BNC female unbalanced.
Input impedance: Balanced/unbalanced: 10k ohms nominal
(resistive).
Input level: 3.5 V p-p (1.24 V rms) nominal for +/- 75 kHz
deviation.
FM signal to noise ratio: 94 dB below +/- 75 kHz deviation at
400 Hz; measured in a DC to 100 kHz bandwidth with 75
ȝs de-emphasis; DIN “A” weighting. Does not exhibit the
subsonic noise associated with analog exciters.
Amplitude response: +/- 0.01 dB, DC to 53 kHz; +/- 0.25 dB,
53 to 100 kHz.
Total harmonic distortion: 94 dB or 0.002% THD over stereo
sub-band (DC to 53 kHz).
Intermodulation distortion: CCIF: 0.008% (14/15 kHz 1:1);
SMPTE: 0.008% (60/7000 Hz 1:1).
Transient intermodulation distortion (DIM): 0.005% (2.96
kHz square wave / 14 kHz sine wave modulation).
Slew rate: 9 V/ȝs, symmetrical.
Group delay variation: +/- 5 ns, DC to 53 kHz, +/- 50 ns, 53
to 100 kHz.
Phase response variation: +/- 0.1
o
from linear phase, DC to 53
kHz.
ANALOG STEREO and SCA PERFORMANCE
NOTE: Analog stereo and SCA performance with the DIGIT
TM
exciter is defined almost entirely by the program link and
external generators.
All specifications referenced to any single output frequency
(87.5 - 108 MHz), nominal rated output power, and 50 ohm,
isolated, non-reactive load. Specifications defined in a
laboratory environment with high grade source and
demodulation equipment. Standard factory measurement does
not include all listed items. Specifications subject to change
without notice.
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