Title: SPEC, ZX TRANSMITTER FAMILY Sheet 2 of 7 Rev: B Dwg: 817-2350-085
Mains restart: > 80% output power in less than 5 seconds after
AC mains failure.
Altitude: 3000 m elevation above mean sea level.
Ambient temperature range: 0 - 50
o
C at sea level, upper limit
de-rated 2
o
Centigrade per 300 m elevation AMSL.
Humidity: 95%, non-condensing.
Dimensions: Standard 19” (48.3 cm) EIA rack; 1RU = 4.45 cm
(1.75”)
ZX2500: 16 RU amp + 1 RU exciter, 62 cm (25”) depth
ZX3750: 16 RU amp + 1 RU exciter, 62 cm (25”) depth
ZX5000: 16 RU amp + 1 RU exciter, 62 cm (25”) depth
ZX7.5: 44 RU rack, 96 cm (38”) depth
ZX10: 44 RU rack, 96 cm (38”) depth
Weight, less exciter (all modules installed):
ZX2500: 67 kg (148 lbs) approx.
ZX3750: 81 kg (179 lbs) approx.
ZX5000: 95 kg (210 lbs) approx.
ZX7.5: 225 kg (500 lbs) approx.
ZX10: 250 kg (550 lbs) approx.
Air cooling: Air input with built-in filter at front. Air exhaust
with built-in DC fans at rear. Ducted air exhaust and/or
input available as option.
ZX2500: 17 m3/min (600 cfm) approx.
ZX3750: 17 m3/min (600 cfm) approx.
ZX5000: 17 m3/min (600 cfm) approx.
ZX7.5: 34 m3/min (1200 cfm) approx.
ZX10: 34 m3/min (1200 cfm) approx.
Ambient noise: Worst case, 1 m from front face, 1 m above
ground. Mounted in rack, no ducted air input or exhaust.
Figures in parentheses are for ducted air input and exhaust
option.
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.
WIDEBAND COMPOSITE PERFORMANCE
Inputs: Selectable, balanced/unbalanced, female BNC
connector.
Input impedance: Selectable 10k ohms or 50 ohms nominal
(resistive).
Input level: 3.5 V p-p (1.24 V rms) nominal for +/- 75 kHz
deviation.
FM signal to noise ratio: 80 dB below +/- 75 kHz deviation at
400 Hz with 75 µs de-emphasis, 22 Hz to 500 kHz
bandwidth.
Amplitude response: +/- 0.1 dB, 30 Hz to 53 kHz.
Total harmonic distortion (THD+N): 0.02%, 30 Hz to 100
kHz with 75 µs de-emphasis.
Intermodulation distortion: SMPTE: 0.03% (60 / 7000 Hz
1:1) CCIF: All distortion products down 74 dB (reference
14 kHz / 15 kHz tone pair).
Transient intermodulation distortion (DIM): 0.05%, 2.96
kHz square wave / 14 kHz sine wave modulation.
Phase response variation: +/- 0.5
o
from linear phase, 30 Hz to
53 kHz, limited by measurement equipment (see stereo
separation below).
Stereo separation: 50 Hz to 300 Hz: 40 dB; 300 Hz to 15 kHz:
50 dB (as limited by external stereo generator).
MONAURAL MODE (STANDARD)
Input: XLR (female) connector, 600 ohms, balanced, resistive,
transformerless.
Input sensitivity: -8 dBm to +12 dBm for +/- 75 kHz deviation
at 400 Hz, adjustable.
Amplitude response: +/- 0.5 dB with respect to pre-emphasis
curve. Selectable pre-emphasis: flat, 25, 50 or 75 µs.
Harmonic distortion: (THD+N): 0.02%, 30 Hz to 15 kHz with
75 µs de-emphasis.
Intermodulation distortion: SMPTE: 0.03%, 60 Hz / 7 kHz
tone pair, 4:1 ratio, 75 µs pre-/de-emphasis; CCIF: All
distortion products down 74 dB (reference 14 kHz / 15 kHz
tone pair).
Transient intermodulation distortion: DIM: 0.05%, 2.96 kHz
square wave / 14 kHz sine wave modulation (flat).
FM signal to noise ratio: 80 dB below +/- 75 kHz deviation at
400 Hz with 75 µs de-emphasis, 22 Hz to 500 kHz
bandwidth.
SCA/RBDS/RDS INPUTS (STANDARD)
Number of inputs: Three, female BNC.
Input impedance: 10k ohms, unbalanced.
Input sensitivity: 1.5V p-p (nominal) for 10% injection.
Subcarrier frequency range: 57 kHz to 92 kHz (25 kHz to 92
kHz in monaural operation).
Amplitude response: +/- 0.3 dB, 20 kHz to 100 kHz.
COMPLIANCE
RoHS 2002/95/EC compliant: Yes.
R&TTE 1999/5/EC compliant: Yes.
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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