9200/9205/9205N Series Monaural STL

 

FEATURES BENEFITS
Frequency Synthesized Transmitter and Receiver Field-programmable for ease of set-up and frequency change
Optimized for stereo or dual mono with redundancy Excellent separation and on-air reliability
0.2% T.H.D., 70 dB SNR, 70 dB channel separation High quality / low distortion operation
Internal phase and gain matching for excellent stereo performance Superior stereo separation through precise matching of units
Designed for channel allocations as little as 100 kHz and 200 kHz Spectrum efficient for operation in congested areas
Spurious free, on-channel power amplification Wide bandwidth operation provides excellent performance
Economical built-in subcarrier generator and demodulator (optional) Enhanced capability for remote control and data applications
Built-in automatic changeover in receiver Less hardware for hot standby for even greater reliability
External interface to transmitter automatic changeover Back-up, hot-standby operation easily accomplished

GENERAL DESCRIPTION

The Model 9200 Series Monaural STL System is an economical, frequency-synthesized STL system which is designed for either single, redundant dual channel or stereo program transmission for studio to transmitter links or inter-city relays.  Both the transmitter and receiver utilize state-of-the-art Very Large Scale Integrated (VLSI) circuits to achieve low component count for high reliability and reduced manufacturing costs.

The optional built-in 39 kHz FM subcarrier generator and demodulator may be utilized for either data transmission or a supervisory channel.

When two STL transmitters and receivers are used for stereo, provision is made for properly matching phase and gin characteristics between the two pairs.

Both the transmitter and receiver feature comprehensive front panel metering for monitoring system performance including forward and reverse power and other important diagnostic functions.

FREQUENCY SYNTHESIZED

The TFT patented frequency synthesized design provides very low phase noise and low spurious output so that the STL system can achieve greater than 70 dB SNR with only +/- 22 kHz of FM deviation, which makes efficient use of the RF spectrum.  The "on channel" amplification technique instead of crystal modulation / multiplication eliminates the errors inherent in a crystal frequency multiplication STL system.  The 9200/9205 is an ideal narrow band STL system which is optimized for operation in congested RF environments.  It has excellent protection against adjacent channel interference and delivers broadcast quality sound without degradation. 

STEREO OPERATION

For stereo or dual mono installations in which the transmitter and receiver pairs share common antennas, TFT can furnish a transmitter combiner/isolator which eliminates intermodulation products and a receiver low noise antenna splitter.

SPECTRUM EFFICIENT CHANNEL SPACING

The 9200/9205 is available in two different RF channel spacing configurations.  The standard is for a minimum 200 kHz channel spacing with a deviation of +/- 22 kHz for the program channel and +/- 3 kHz deviation for a 39 kHz subcarrier for data or remote control.  The 9200/9205N is a narrow band system which incorporates a phase-linear crystal filter for a minimum 100 kHz channel spacing with a deviation of +/- 15 kHz for a 15 kHz program channel only.

HOT-STANDBY OPERATION

Model 7770 Transmitter Automatic Changeover unit is an optional 1-3/4" high rack mount unit which monitors critical parameters of two transmitters.  If a fault is detected, it automatically switches the antenna to the hot standby transmitter.  Changeover can also be accomplished by a front panel switch or relay contact closure in remote equipment.

The 9205 receiver has a built-in failure sensing and changeover circuit.  When the primary receiver fails, it automatically switches the output to the hot-standby unit.  No optional receiver changeover is required.

OPTIONS

SCA/MUX Encoder (7100-4227) = Plug in SCA/MUX generator board for subcarrier frequency of 39 kHz.

SCA/MUX Decoder (7100-3752) = Plug in SCA/MUX decoder board for demodulation of the 39 kHz subcarrier channel.  Please specify audio or subcarrier output.

SPECIFICATIONS

 

SYSTEM  
Frequency Range, Model (Tx/Rx), Output

other frequencies available upon request

800-960 MHz, 9200/9205, 5-8W                                               400-480 MHz, 9240/9245, 15-20W                                            300-340 MHz, 9230/9235, 15-20W                                            200-240 MHz, 9220/9225, 15-20W                                            140-180 MHz, 9210/9215, 15-20W
Frequency Response Audio program: +/- 0.2 dB or better, 30 Hz to 15 kHz.         MUX: +/- 3 dB, 50 Hz to 5 kHz
Distortion (THD & IMD) 0.2% or less at 1kHz
Signal-to-Noise Ratio 70 dB or better below 100% modulation, de-emphasized
Stereo Channel Separation 70 dB

 

TRANSMITTER  
RF Power Output See above
RF Output Connector Type N Female, 50 ohms
Deviation for 100% Program Modulation  +/- 22 kHz for 200 kHz channel spacing (standard)                   +/- 15 kHz for 100 kHz channel spacing
Subcarrier Frequency 39 kHz
Subcarrier Deviation +/- 3 kHz FM
Subcarrier Injection +/- 3 kHz
Frequency Stability Better than .00025%, 0 degree C to + 50 degree C
Spurious and Harmonic Emission 60 dB or more below carrier level
Modulation capability One monaural program and one subcarrier (built-in or external)
Modulation Inputs Program: 3.0 Vp-p for 100% modulation, 2k ohms, balanced and unbalanced, BNC and terminal strip.  MUX audio: 1.2 Vp-p for 100% modulation of internal subcarrier generator, 2k ohms.  External Subcarrier: 1.2 Vp-p for 100% injection, 2k ohm
Automatic Changeover Provision for interface with Model 7770 Transmitter Automatic Changeover
Power Source 115/230 VAC +/- 10%, 50/60 Hz, 75 watts, +12 VDC optional
Monitoring Capability One 2-1/2" analog meter for monitoring forward and reflected RF power, power supply current, multiplex and program modulation, and VCO bias
Dimensions and Weight 5.25" (13.3 cm) H x 19" (48.2 cm) W x 12" (30.5 cm) D at 34.5 lbs. (15.7 kg) shipping weight
FCC Emission Designator 122K9E6F with 39 kHz subcarrier, 60K3EGN without subcarrier
FCC ID BIO9200

 

RECEIVER  
RF Input Connector Type N Female, 50 ohm
Sensitivity 15 microvolts required for 50 dB SNR, de-emphasized and 100 microvolts for 65 dB SNR, de-emphasized
Selectivity standard 200 kHz, +/- 65 kHz at 3 dB BW channel spacing  standard 200 kHz, +/- 400 kHz at 40 dB BW channel spacing "N" version 100 kHz, +/- 30 kHz at 3 db BW channel spacing "N" version 100 kHz, +/- 100 kHz at 40 db BW channel spacing
Modulation Outputs Program: 7.0 Vp-p, 600 ohm balanced and 3.5 Vp-p, 75 ohm unbalanced, BNC, terminal strip.  Multiplex: 2.2 Vp-p, 600 ohm BNC.  Multiplex Audio: 600 ohms, unbalanced
Automatic Changeover Built-in loop through circuit standard
Power Source 115/230 VAC +/- 10%, 50/60 Hz, 50 watts. +12 VDC optional
Monitoring Capability One 2-1/2" analog meter for monitoring power supply, 1 to 120% modulation for program and multiplex channels, RF input level, and VCO bias
Dimensions and Weight 3.25" (8.3 cm) H x 19" (48.2 cm) W x 14" (35.6 cm) D at 15 lbs. (6.8 kg) shipping weight
Operating Temperature 0 degree C to + 50 degree C