hf/rf ZONE Products for the week of October 22, 2001
Agilent Technologies Says . . .
Agilent Technologies expands transceiver product family
with introduction of small form factor transceivers
OC-3 and OC-12 SONET/SDH transceivers complement 2.5 Gb/s
OC-48 devices to address bandwidth bottlenecks in metropolitan area networks
Agilent Technologies Inc. announced that it has expanded its family of transceivers with the introduction of small form factor (SFF) fiber optic transceivers for SONET/SDH long reach (LR) and intermediate reach (IR) links. The new OC-3 (155 Mb/s) and OC-12 (622 Mb/s) transceivers, critical transport mechanisms for the communications industry, complement Agilent's OC-48 (2.5 Gb/s) transceivers, introduced in March. The expanded product group is an important element in addressing networking bandwidth bottlenecks that currently exist in metropolitan area networks (MANs).
"Agilent is the leader in SFF fiber optic transceivers, having shipped over 2.5 million SFF units," said Tom Fawcett, product marketing manager for Agilent's Networking Solutions Division. "We're applying our high-quality, high-volume expertise in the enterprise to the SONET space to produce new devices for our customers that can be produced economically at any volume."
Agilent, the world's no. 1 manufacturer of fiber optic transceivers, now offers the industry's broadest line of Metro SFF transceivers. Offering a variety of data rates, distance, temperature ranges, and package configurations, each product is tested for Bellcore Standard compliance, and has passed rigorous tests for mechanical and thermal shock, vibration, moisture, and temperature variations. The devices also comply with all regulations for eye safety and flammability.
Agilent's new transceivers, delivered in the popular LC connector format, demonstrate superior jitter performance, delivering ample margin to the SONET standard so designers can increase performance and compensate for other devices within the system. The transceivers have also been designed to provide excellent EMI performance suitable for panel-mounted applications. EMI measurements have demonstrated significant margin to FCCB specifications, so designers can feel confident of passing regulatory EMI system testing.
Agilent has developed proprietary manufacturing techniques to ensure
very high product reliability. Agilent employs a unique module construction
that allows separate parts of the transceiver to be produced and tested
independently. The result is a family of extremely rugged transceivers that
can be produced economically at any volume.
analogZONE Says . . .
The HFCT-5961NL OC-3 single-mode laser transceiver is in the increasingly popular LC connector interface format and in the new industry standard 2 x 5 DIP style package. The transmitter section of the transceiver uses a 1300-nm Fabry Perot laser and incorporates a monitor photodiode used as a loop control to the laser bias driver. As well as the laser modulator, the transmit side contains the LVPECL balanced input interface. The receive section of the transceiver uses an InGaAs/Inp photo detector with the trans-impedance amplifier mounted with it on an optical subassembly that gives a better than 14 dB optical return loss (ORL.)
The signal is ac coupled from the TIA to the postamplifier and also passes through a low-pass filter to limit noise. The size if the ac coupling capacitors is chosen to pass the SONET/SDH test pattern at 155 Mbit/s without significant distortion. Power supply noise is also filtered within the module. The output buffer provides the LVPECL interface to a balanced output, and a signal detect circuit looks at the peak level of the signal, compares this to a reference and outputs a signal detect signal that is also LVPECL.
Supply is in a tightly-controlled range of 3.14 to 3.47 V with the transmitter taking 140 mA max, and the receiver taking 140 mA as well, for a total dissipation of just under 1 W maximum. The PSR is a typical 100 mV p-p.
The transmitter offers an output of 0 dBm maximum, with an end-of-life minimum of -5 dBm, and a spectral width of 4 nm rms maximum. The receiver offers a wider operating wavelength than needed at 1300 nm and has a receive sensitivity of -34 dBm maximum, and a typical overload point at 0 dBm.
This is another major player for Agilent in metrolinks, of which installations
are multiplying at a truly astonishing rate. Complete solutions, like this
for OC-3, will always be the preferred buy for the majority of users. The
HFCT-5961NL is sampling now in, as noted, the 15.0 x 14.0 x 10.0 mm 2 x
5 DIP package with LC connectors and is expected to price at $130 in 1000-piece
lots.