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Motorola radio repeater duplexer skytrax vari-notch

For Sale: Motorola radio repeater duplexer skytrax vari-notch

Subject Motorola radio repeater duplexer skytrax vari-notch
Ad is submitted by poster: Motorola Radio Repeater Duplexer SkyTrax Vari-Notch
Duplexer: Vari-Notch Circuit - Model #: 28-88-0101A - 890-960 MHz, currently set to TX 954.350, and RX 957.950
* Frequency Range : 890-960 MHz
* Minimum T-R Separation : 3.6 MHz
* Tx Insertion Loss : 1.25 dB
* Rx Insertion Loss : 1.25 dB
* Transmitter Noise Suppression : 90 dB
* Transmitter Carrier Suppression : 90 dB
* Between Channel Isolation : 40 dB
Specifications (Mechanical):
* Temperature Range : -40 to +80Â°C
* Connectors : TX and RX Ports: N, Antenna Port: N
* Mechanical Mounting : 19" Rack Mount
More Duplexer Information is available at TX RX Systems
The series 8000 modular design concept permits a wide variety of configurations of low density links in the 960 MHz and 2 GHz microwave communications bands. Future changes and expansions are readily accomplished with a minimum of field rework or down time. Systems can be optimized for particular applications with optional transmitter powers and receiver bandwidths. In Series 8000, Nutel can provide one-way or duplex terminals and repeaters in unprotected, protected, and space/frequency diversity systems. In the 790 to 960 MHz range, Series 8000 can carry up to 36 fequency division multiplex channels plus a service channel. RF power options are 0.5,1.5, and 6.0 watts minimum. Receive bandwidth options are 35 kHz, 100 kHz, 200 kHz and 800 kHz. In accordance with the United States FCC Rules for private microwave systems operating within the 952 to 960 MHz band, emission bandwidth is limited to 200 KhZ. Within this limitation, Nutel Series 8000 can carry up to 12 voice channels plus a service channel. In addition, The radio is also capable of operation in the 932.5 to 935 MHz / 941.5 to 944 MHz bands for the proposed government/private shared point to point service. In the 1700 to 2500 MHz range, Series 8000 systems can carry up to 36 frequency division multiplex channels plus a service channel. RF power is 1.0 watt minimum. Receiver bandwidth options are 200 kHz, and 800 kHz. Series 8000 transmitters and receivers use direct crystal controlled oscillators; no AFC or phase-locked loop circuits are used. Oscillators are temperature-compensated so as to eliminate temperature stabilized ovens. Modulation is a combination of FM and PM. The transmitter oscillator frequency is directly modulated for frequecies from 20 Hz to 4kHz, and phase modulated by frequencies above 4 kHz. This results in flat deviation below 4 kHz and deviation preemphasis above 4 kHz.
Transmitter Frequency Multiplication Card (8010H):
Series 8000 oscillators operate in the vicinity of 13 MHz. For both 960 MHz and @ GHz, the multiplier chains are identical up to 320 MHz. Multiplier stages are X3, X2, X2 and X2. The 960 MHz equipment uses a transistor tripler which yields exceptional efficiency. The 0.5 watt transmitter requires less than 5 watts DC power, and the 1.5 watt unit less than 13.4 watts DC. The optional 6 watt amplifier needs 15.6 watts DC power. The 2 GHz transmitters use a 320 MHz power amplifier followed by a single step recovery diode multiplier of either X6, X7 or X8.
The Series 8000 receivers have internal preselectors so that there is no need for external bandpass duplexers for image rejection or out of band interference protection. For close TX-RX frequency spacing (3.6 MHz) at 960 MHz, notch type duplexers are used. For TX-RX spacings on the order of 50 MHz at 2 GHz, ferrite circulators are used for duplexing. Series 8000 receivers employ dual conversion with intermediate frequencies of 30 MHz and 5.4 MHz. Bandwidth options are provided by replaceable IF filters.
Skytrax 9500 Multiplex Module (11 9500 Variable TX/RX Cards):
* From 1 to 634 channels, 4KHz to 2540 KHz
* Frequency-synthesized; all modems are identical
* 9.6 - 57.6 kbps data capability
* Easily field-expanded and rechanneled
Each Series 9500 modem contains a switch programmable frequency synthesizer which allows it to operate on any 4 kHz and 2540 kHz. Other than the channel selector switch no other adjustments are necessary to change the channel frequency. Since all channels are identical the need for multiple spares is greatly reduced and field change of equipment is easily accomplished.
Signaling is accomplished using a 3825 Hz out-of-band signaling tone. A switch in the 9500 modem allows selection of normal or inverted signaling functions. Front LED's show the status of the E&M signaling at all times. An internal strap provides "E" lead contact protection if required.
Four synchronization modes are available:
In this mode, which requires no common equipment, each channel individually synchronizes on the received 3825 OBS tone. This requires that the OBS tone of the master 9500 be "on" when the channel is active.
Master Sync Mode: In this mode, all the channels at a terminal are synchronized to a high stability source. When used end to end with itself or CCITT compatible equipment, the frequency translation will be small, but not zero, and independent of the E&M condition. Master oscillator stabilities available are 0.1, 2, and 5 PPM. The frequency translation error at each end of the link will be the oscillator stability multiplied by the HF line frequency.
Master Sync with Pilot Lock:
This is a variation of Mode 2 with the addition of synchronization to a CCITT frequency reference pilot. This provides zero frequency translation error. The Series 9500 can operate end-to-end with CCITT standard equipment and frequencies or we can provide the master and slave pilot modules to make a complete system. The slave unit will revert to Mode 2 upon loss of received pilot. Master and slave modules are interchangeable in the shelf. Two units can be used for hot standby protection with automatic and manual switching provided.
This mode of operation is used in those special cases where a predictable input-output phase characteristic is required, such as a simulcast transmit system. In this mode, the OBS tone for the channels with phase lock must be "on" at the master site. The same master and slave sync modules used in Modes 2 and 3 are used.
* Is there a loading dock or fork lift available at your location?
* Will the delivery driver be required to bring the item inside?
* What is your full address and phone number?
* Custom built crating is available. Additional Fees apply.
* Our 14 Day Guarantee Against DOA (Dead On Arrival) does not guarantee compatibility.
* The warranty period starts from the day the item is received.
Click here for authorization form
* We do not accept American Express
* Cashier's Check/Money Order
* Company Check (10 business-day hold)
* hours: Monday-Friday 9:00am-5:30pm CST
* address: 12510 Trails End Rd Leander TX, 78641

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