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Technical Specifications

 

4MX 25 - Technical Specifications

Sep 20, 2017

RF Specs

Output Power:
Range250 W to 27.5 kW
Accuracy±2%
Efficiency85% at 25 kW RF output; 86% typical
VSWR1.2:1 or better at rated power
Impedance50 Ohm
Frequency:
Range531 kHz to 1700 kHz, supplied on frequency, as ordered; 9 kHz or 10 kHz channel spacing
Stability±2.5ppm, 0 to 50° C
Spurious & Harmonic80 dB; Meets or exceeds FCC and other world standards
Modulation:
TypePatented 4M Modulation exciter
Capabilities>145% peak positive capability at 27.5 kW output power into 50 Ohm load
Carrier Shift<1% at 95% negative modulation at 1 kHz
RegulatoryMeets or exceeds FCC and DOC technical requirements,meets ENG0215 safety requirements

AM Audio Specs (All audio specifications are at rated power)

Analog:
ModesMono, HD Radio with external ASi 10
Connector TypeTerminal block
Input Level-10 dBm to +10 dBm; electronically adjustable
Impedance600 Ohm, balanced
Amplitude Response+0.1/-0.25 dB; 20 Hz to 10 kHz
THD + Noise0.5% or less; 20 Hz to 10 kHz
Intermodulation Distortion0.5% or less; 1:1 ratio
Transient Intermodulation Distortion0.5% or less; 4:1 ratio
Incidental Phase Modulation40 dB @ 1 kHz
Signal to Noise Ratio-70 dB or better
Squarewave Overshoot0.1% or less at 400 Hz
Squarewave Tilt0.5% or less at 40 Hz
AES:
ModesMono L+R, HD Radio with external ASi 10
Connector TypeTerminal block
Input Level0 dBFS to -20 dBFS; electronically adjustable
Impedance110 Ohm, balanced
Amplitude Response+0.1/-0.25 dB; 20 Hz to 10 kHz
THD + Noise0.5% or less; 20 hz to 10 kHz
Intermodulation Distortion0.5% or less; 1:1 ratio
Transient Intermodulation Distortion0.5% or less; 4:1 ratio
Incidental Phase Modulation40 dB @ 1kHz
Signal to Noise Ratio-70 dB or better
Squarewave Overshoot0.1% or less at 400 Hz
Squarewave Tilt0.5% or less at 40 Hz

Mechanical & Physical

Size/Unpacked45" W x 35" D x 87" H
Weight/Unpacked825 lbs (375 kg)
Cooling Air RequirementsFiltered air inlet at lower rear of cabinet, 3000 ft³/min (85.0 m³/min)
Heat Dissipation:
@ 25 kW, 0% modulation4.8 kW (16,382 BTU/hr)
@ 25 kW, 100% tone modulation7.1 kW (24,232 BTU/hr)
Air Conditioning Sizing:
@ 25 kW, 100% Tone Modulation2.02 ton
RF Output Connector3-1/8" EIA Flange, 50 Ohm

Environmental

Temperature0° to 50° C
Altitude10,000 ft (3,048 M)
Humidity0% to 95% (non-condensing)

Electrical

AC Input Voltage:
3-Phase Closed Delta230 VAC (192-265 VAC), 50/60 Hz
3-Phase WYE 3 Wire230 VAC (192-265 VAC), 50/60 Hz
3-Phase WYE 4 Wire400 VAC (332-460 VAC), 50/60 Hz
Disconnect Size
@ 230 VAC, 27.5 kW, 100% Tone Modulation125 A (see Installation Notes Figure 1)
@ 400 VAC, 27.5 kW, 100% Tone Modulation75 A (see Installation Notes Figure 1)
AC Wire Size:
@ 230 VAC, 27.5 kW, 100% Tone Modulation1 AWG - 1/0 AWG (see Installation Notes Figure 1)
@ 400 VAC, 27.5 kW, 100% Tone Modulation4 AWG - 3 AWG (see Installation Notes Figure 1)
Current Draw:
@ 230 VAC (192-265 VAC) input, 27.5 kW, 100% Tone Modulation120 A per phase (see Installation Notes Figure 1)
@ 400 VAC (332-460 VAC) input, 27.5 kW, 100% Tone Modulation69 A per phase (see Installation Notes Figure 1)
AC Power Consumption:
@ 25 kW RF Output Power, 0% Modulation29.8 kW
@ 37.5 kW RF Output Power, 100% Tone Modulation44.6 kW
Power Factor0.99 or better at full load
Surge ProtectionExternal surge suppresor supplied

All Specifications Subject to Change Without Notice


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Related Products

4MX 25 (D) Discontinued

 

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