QUANTUM E Series 150 - 600 Watt
FM Broadcast Transmitting System
QEI QUANTUM "E" Series advanced technology FM broadcast transmission systems for superior on-air performance. The QUANTUM "E" establishes a new level in FM performance with the advantage of the highest power emergency back-up available in an exciter style package. QEI took the field-proven design of the model 695 exciter and incorporated a high power FET amplifier to deliver uncompromised performance as a transmitter, exciter, booster or translator**.
The QUANTUM "E" Series is an all solid state, broadband, frequency synthesized, "on carrier" direct FM, phase locked, transmission system, designed to exceed the FCC requirements for use in the FM broadcast band.
The QUANTUM "E" Series may be programmed to operate on any 100 kHz increment (10 kHz optional) in the FM band. Direct FM "on carrier" operation insures spurious free transmission and extremely low distortion, crosstalk, noise, and no stereo degradation. The frequency modulated oscillator (FMO) of the QUANTUM "E" Series has superior linearity and does not require any "pre-distortion" networks to achieve high performance specifications. Sound for sound the QUANTUM "E" will match other FM exciter/transmitters costing twice as much or more. The FMO is sealed in a specially designed high Mu enclosure to shield it from stray magnetic fields and is acoustically dampened to eliminate microphonics.Download the
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The Power Amplifier (PA) of the QUANTUM "E" Series is unconditionally stable and will withstand any magnitude or phase of VSWR indefinitely without damage by automatically reducing power. The conservatively designed QUANTUM "E" Series power amplifier can be varied from a few Watts to full output without any oscillation or "break up".
The QUANTUM 150E, 300E & 600E are housed in a rack space saving dual 5-1/4" package. The QUANTUM "E" Series series when used as an exciter or replacement for the exciter and driver will fit into virtually all transmitters in use and is the perfect upgrade for older systems.
Complete metering of critical parameters is available at the push of a button. All operational indicators are LED's to eliminate all routine lamp replacement. RF and audio connections are made by way of back panel connectors. A BNC for composite audio and barrier strip for monaural audio are provided on each system. The QUANTUM "E" Series series between 150 Watts and 600 Watts utilizes a type "N" female output connector. Reliability and simplicity of design and operation make the QUANTUM "E" Series FM broadcast transmission system an outstanding choice for every FM station.
A short list of features:
• Ultra Low Distortion, Crosstalk and Noise
• Highest Power Emergency Back-up
• Frequency Synthesized
• Phase Locked
• "On Carrier" Direct FM
• Solid State FET Amplifier
• Stability +/- 200 Hz (00 C to 500 C)
• Compact Rack Mount Package
QEI FM transmitters, designed and manufactured with pride in the U.S.A.
Technical Specifications
GENERAL
Power Output:
QUANTUM 150E: 50 to 150 Watts
QUANTUM 300E: 100 to 300 Watts
QUANTUM 600E: 100 to 600 Watts
Frequency Range: 87.5 to 108 MHz
RF Load Impedance: 50 ohms
Output Connector: QUANTUM 150E through 600E Type "N" Female
VSWR: 1.6:1 max. at full power (automatic power control for operation at reduced power into any phase or magnitude)
RF Harmonic/Spurious: Suppression meets or exceeds all FCC /DOC / CCIR specifications
Exciter: QUANTUM 150E through 600E Integral
Frequency Stability: +/- 200 Hz from 0°C to 50°C
Modulation Capability: Greater than +/- 350 kHz
Modulation Sensitivity vs. Temperature: 0.01 % per degree Centigrade
Pre-Emphasis:
Standard: 75usec (FCC)
Optional: 50usec (CCIR)
Asynchronous AM S/N Ratio (AM Noise): -55 dBc (no FM Modulation present)
Synchronous AM S/N Ratio (Incidental AM): -50 dBc with 100 % FM modulation
ELECTRICAL/MECHANICAL
AC Power requirement: (150E Through 600E) 120 VAC, 50/60Hz single phase. (240 VAC and DC input options available)
Ambient Temperature Range:
Operating: -15°C to +50°C
Startup: 0°C to +50°C
Maximum Altitude: 10,000 feet AMSL
Maximum Humidity: 95% non-condensing
Size:
Transmitter: 150E Through 600E Amplifier 5.25"H (13.35cm) x 19"W (48.25cm) x 19"D (48.25cm) note: add 2-1/2" for connector clearance. (Rack Mount)
Power Supply: 150E Through 600E 13.75"H (34.375cm) x 9.5"W (23.75cm) x 12.00"D (30.00cm)
MONAURAL PERFORMANCE
Input Impedance: 600 ohm balanced, 60 dB common mode suppression
Input Level: +10 dBm nominal for +/-75 kHz deviation at 400 Hz
CMMR: >60dB
Frequency Response: +/-0.5 dB, 30 Hz to 15 kHz
THD+ N: 0.02 % or less at 400 Hz
FM S/N Ratio: -80 dB below +/-75 kHz deviation at 400 Hz, measured in a 50 Hz to 15 kHz bandwidth with 75 usec de-emphasis
WIDEBAND COMPOSITE PERFORMANCE*
Inputs: (1) unbalanced on rear panel, BNC connector
Input Impedance: 10K ohm , nominal, resistive
Input Level: 3.5 Vp-p nominal, for +/-75 kHz deviation
FM S/N Ratio: 80 dB below +/- 75 kHz deviation at 400 Hz, measured in a 50 Hz to 15 kHz bandwidth with 75 usec de-emphasis
THD + N: 0.02 % or less at 400 Hz
Amplitude Response: +/-0.01 dB, 30 Hz to 75 kHz
Phase Response: +/-0.1 degrees from linear phase, 30 Hz to 75 kHz
Composite Slew Rate: 9 V/microsecond (symmetrical)
STEREO PERFORMANCE*
Frequency Response: +/-0.1 dB, 20 Hz to 15 kHz
THD + N: 0.02 % or less at 400 Hz
FM S/N Ratio: 80 dB below +/- 75 kHz deviation at 400 Hz, measured in a 50 Hz to 15 kHz bandwidth with 75 usec de-emphasis
Stereo Separation: >60dB
Dynamic Stereo Separation: >60dB
Crosstalk:
(Linear): >60 dB
(Non-Linear): >60dB
SCA PERFORMANCE
Subcarrier Inputs: (3) total, unbalanced, BNC connectors
Subcarrier Input Impedance: 10 Kohm, nominal, resistive
Subcarrier Input Level: 1.0 Vrms nominal for 10 % injection
Subcarrier Amplitude Response: +/-0.2 dB, 40 kHz to 100 kHz
* Quantum-Series performance is specified using listed exciter, 710A digital stereo generator at rated transmitter power into a 50 ohm resistive load. Specifications are subject to change without notice. Since measurement techniques vary, care should be observed in comparing specifications of different manufacturers.
** Translator option available