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B41828A6685M_Datasheet PDF

来源:LM317 Electronics Components编辑:NEC时间:2021-06-15 14:39:20

When you joined Cadence in the second quarter of 2002, Cadence had 5,761 employees and was taking in an annualized $240,000 per employee. By this year's second quarter, that had dropped to 5,178 employees contributing $213,000 each to revenue. In dangerous contrast, your biggest rival, Synopsys, earned $275,000 in revenue per employee in this year's second quarter.

Marrying Modules

Now let's look at Aeroflex's 3020 module. Marrying a Model 3020 with a 3010 (or more stable 3011) module lets you generate a variety of wireless signal types, especially when running under Aeroflex's optional IQ Creator software. That combo can let you generate spectrally clean waveforms for a variety of wireless standards, such as GSM, EDGE, UMTS, IS136, IS95, and cdma2000, as well as WLAN systems. You can also generate customized waveshapes for FSK, PSK, and QAM, along with burst signals.

B41828A6685M_Datasheet PDF

Using a 3020, an IQ waveform source can be derived from either an internal arbitrary waveform generator (AWG) or across an external (LVDS) interface. The AWG can store 32 Msamples, with each sample word consisting of 14-bit I and 14-bit Q data, and a 4-bit marker. In use, the AWG's memory can store either a single long waveform or any number of smaller waveforms, too, rapidly transferring waveform data between your system controller and the AWG, across the PXI bus.

These features also support the 3020's use as a test block within other PXI-based test systems. Moreover, its fast settling time capabilities should also be advantageous in production test settings, where high throughput is desirable.

Spec-wise, the 3020's IQ vector modulation has a bandwidth of 12-MHz, with carrier leakage and sideband suppression typically down -50 dBc (with a 10-kHz tone). For UMTS W-CDMA signals, modulation linearity is better than 55 dB, making the 3020 suitable for testing W-CDMA amplifiers that are also highly linear.

B41828A6685M_Datasheet PDF

The 3020 also gives you lots of triggering options, with inputs routed either through an LVDS front-panel input jack, or across the PXI backplane. Triggers can also be programmed into waveform files, where they can be used to trigger other instruments.

Digitizing Signals

B41828A6685M_Datasheet PDF

For input signal processing, Aeroflex's Model 3030 broadband digitizer serves in conjunction with a 3010 (or 3011) module. The gate array-based 3030 module (the array is there for upgrades) down-converts and digitizes signals up to 15-MHz in bandwidth, from 330-MHz out to 3-GHz. Frequency conversion is to an IF at 46 MHz.

Thanks to its linearity and low noise, a 3030 module can be used to digitize many types of wireless signals, accepting signals up to +10 dBm (input level control uses fast electronic switched attenuators, selectable in 4 dB steps) and outputting amplitude- and phase-corrected digital IF or IQ data samples. These samples have an amplitude accuracy of 0.5 dB (typ).

After a punishing couple of years, a select few network processor (NP) suppliers have mustered the staying power to ready their product lines for a market that, after early promise and a subsequent collapse, is on the verge of renewed growth.

More than 30 NP vendors landed on the scene in the late '90s to exploit a product segment that by many estimates was to have reached $7 billion within a few years. After struggling, however, even to reach $70 million in 2001, the sector's survivors are reporting that design wins are at last beginning to materialize.

Many of the end products demanding NPs, including routers, switches, and other communications equipment, are still in prototype phase but are heading for larger-scale production–bringing with it the possibility that some NP vendors will realize their first-ever profits.

Translating test NP engines into production engines has long been the bottleneck, but now NPs are transferring into a strong revenue stream for us,” said Bob Gohn, marketing director for Motorola Inc.'s Semiconductor Products Sector in North Andover, Mass.

The top suppliers are each reporting revenue growth of 15% to 20% this quarter, according to several research firms, including In-Stat/MDR and The Linley Group. By most accounts, NP sales were valued at $60 million last year and are expected to remain largely flat in 2003, despite the uptick this quarter. Sales in 2004 are forecast to grow 10% or more, still leagues away from the inflated projections that contributed to the frenzy of the 1990s.

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