Of the new products in the November 2000 issue, this one generated the biggest reader response. For more information on this product, log on to www.optoelectronics.com.
Frequency counter decodes DTMF
The Multicounter CD 100 from Optoelectronics combines a 0.5ppm TCXO frequency counter with a CTCSS, DCS, LTR and DTMF decoder. Key up an analog radio, and the frequency counter locks onto the signal and then displays the transmit frequency as well as the tone or code for that frequency. A two-line LCD with EL backlight improves operation in low-light conditions. It operates in the 10MHz-1GHz frequency range and is powered by built-in NiCd batteries.
Fleet manager uses GSM, PCS network
Trimble’s Crosscheck GMS 1900 mobile communicator for fleet management combines a GPS receiver, GSM, PCS technology and IQ Eventengine firmware in a single module. The move to this single communications unit can bring a reduction in cost and installation time to operators. This product sends GPS data and messages from the mobile unit to a base station running Fleetvision or third-party software.
Cable improves radio coverage
Andrew’s Radiax RXL-4.5-1 is a ⅝” coupling-mode cable suitable for installation in buildings and in tunnels where speed of installation is required. This smaller-size cable is easy to install and offers lower insertion loss. The cable features a corrugated, welded copper outer conductor over a low-density, foam-covered inner conductor. Holes milled in the corrugation peaks of the outer copper conductor produce the radiating cable effect.
Headset features wrap-around design
Eartec’s Monarch headset features a flexible backhand molded with PBT, a polymer developed for use in the manufacturing of automobile bumpers. The wrap-around design offers a low fatigue, comfortable fit even when worn with safety helmets. Each headset includes an inline push-to-talk assembly rated for 10,000 operations and a connector for a portable transceiver.
Vertical pattern yields wireless coverage
Radio Frequency Systems’ base station/hub antenna provides two-way broadband wireless data and Internet connection to homes and businesses as well as to mobile wireless subscribers. Developed for two-way MMDS applications in the 2.4GHz-2.7GHz microwave frequency range, the antenna uses radiating element technology that rejects interference from cross-polarized sources. The unit’s vertical patterns are tailored to conform to a cosecant squared power envelope, which produces the right amount of null fill and upper sidelobe suppression.
System supports LAN card
The Rocky Unlimited mobile computing system from AMREL offers new features including an Intel Pentium III 700MHz processor, a mini PPCI slot and expansion capabilities. This system also supports a coexisting LAN card/fax modem, CDPD and COM ¾ card. Standard features include temperature resistance, 89-key backlit keyboard, two type II or one type III PCMCIA slots and a removeable HDD.
Amplifier provides as much as 150W
The LMS amplifier from TPL Communications has been mechanically redesigned for easier serviceability, if needed. The amplifier is engineered to provide as much as 150W of power in any band between 35MHz and 960MHz, in a compact package using only 7″ of vertical rack space. Input power ranges from 50mW to 50W are available. This product is self-contained with a switching power supply and includes a front-panel digital meter and LED indicators for local monitoring of important test conditions.
Transmitter offers weather resistance
The Quick Talk model from Ritron integrates digital voice recording technology with a PC-programmable 6W radio transmitter. This weather-resistant transmitter monitors as many as two contact closure/switch inputs and transmits custom voice messages over any VHF or UHF radio system. Line-of-sight coverage can be achieved through a radio repeater.
Radio migrates easily
Motorola’s HT1550 XLS Professional Series portable radio features dual-mode operation capability that allows users to switch between LTR and conventional modes at the touch of a button, and makes migration easy for growing businesses. Additional features include MDC signaling, four-line alphanumeric display, as many as 160 conventional channels and as many as 15 trunked zones with 16 talkgroups each.
Vocoder useful where bandwidth is premium
The AMBE+2 from Digital Voice Systems performs under bit errors and acoustic background noise conditions. This product is useful for mobile radio, secure voice, satellite communications, computer telephony and other digital voice and storage applications where bandwidth is at a premium.
Repeaters come tuned, assembled
Topaz3 offers four single user, low-power repeaters. Two basic models (the SR-125V VHF and SR-125U UHF) and two models with built-in six-cavity duplexers (the SR-125DV and SR-125DU) are offered. Each of the repeaters include two fully programmed Maxon SD-125RF link modules and feature one CTCSS tone, a programmable repeater time-out timer to prevent lock-up and excessive transmissions and TX hang-on. All of the repeaters are completely assembled, tuned and ready for wall-mount or desktop use.