- Buyers Guide
2.488 GHz SONET VCXOs
These subminiature surface-mount or through-hole voltage-controlled crystal oscillators (VCXO) are designed for synchronous optical network (SONET) applications and operate at 2.488 GHz, extending previous frequencies of 155.52 MHz for OC3, 622.084 MHz for OC2, and 311.04 MHz for EC applications. The VCXOs are packaged in ceramic with a grounded metal cover for electromagnetic interference suppression. The operating temperature ranges from –40° to +85°C and frequency tolerance is specified at +/-20 ppm. Jitter is rated at 10 ps (max) (5 ps (typ)) with rise and fall times of 750 ps (max). Deviation is +/-75 ppm (min). Size: 0.450 x 0.550 x 0150. Delivery: stock to two weeks for prototypes; four to six weeks for production quantities packaged in tape-and-reel tubes.
The model F20VXS frequency doubler provides +8 dBm output from 4 to 12 GHz with an input of +19 dBm from 2 to 6 GHz. Typical fundamental isolation is 25 dB with a conversion loss of 10 dB. The frequency doublers can be provided in drop-in or hermetically sealed packages (which can be screened to MIL-STD-883 requirements).
Santa Clara, CA
High Frequency, Wide Temperature Range VCXO
The model DFV 14-MSW VCXO is available with a sine wave output from 16 to 160 MHz. Standard stabilities includes +/-15 ppm from 0° to 70°C and +/-30 ppm from –40° to +85°C. This unit offers a minimum +/-100 ppm pulling with 10 percent linearity. The 14-pin dip package measures 8.5 mm high. An encapsulated crystal guarantees good long-term performance.
Fordahl USA Inc.,
2 - 18 GHz Digitally Tuned Oscillator
The model D6218 digitally tuned oscillator operates from 2 to 18 GHz and offers frequency settling to better than +/-1 MHz (typ) within 1 msec, an accuracy of +/-0.5 MHz at 25°C and a frequency drift of less than +/- 0.1 MHz/°C (max). RF power output is + 10 dBm (min) with a variation of less than +/- 2.5 dB, including the effects of frequency response and temperature. Phase noise at a 100 kHz offset is less than –65 dBc and residual FM at –3 dBc is 150 kHz peak to peak (max). Size: 6.48" x 6.23" x 2.00".
General Microwave Corp.,
(516) 226-8900, ext. 291.
Solid-state Ka-band Transmitter
This solid-state transmitter is designed for digital and analog FM video signals and data operating in the 25 to 31 GHz Ka-band. Standard output power is +30 dBm at P1dB. (Higher power levels are available). The unit is available in 1 to 4 W with an internal power supply of 120/240 V AC. The power supply section is packaged in a 19" rack enclosure.
12.6 - 20 MHz Surface-mount TCXO
The model RTXO-113 surface-mount TCXO features a voltage-control option up to +/-18 ppm/V and a stability of +/-2.5 ppm over the –30° to +80°C operating temperature. In addition, frequency variations with aging are less than +/-1 ppm/year and stability with power source variation is better than +/-0.3 ppm for a +/-5 percent change in Vcc. The unit is powered by a single +3 V supply and features a current drain of 1.5 mA (max). The output voltage is a 1 V peak-to-peak clipped sine wave capable of driving a 10 kW load shunted by 10 pF. The TCXO is available in standard communication frequencies from 12.6 to 20 MHz. Phase noise characteristics are –135 dBc at a 10 kHz offset. Price: $6 each (10,000). Delivery: eight to 10 weeks (ARO).
Raltron Electronics Corp.,
Low Voltage OCXO
The OCXOT series oven-controlled crystal oscillator (OCXO) is designed for base stations, Global Positioning Systems (GPS), high performance hand-held RF devices, RF data collection and medical equipment. The OCXO is supplied in a 14-pin DIL hermetically sealed ceramic package, features a 10-second warm-up time and requires 25 mA (typ) to operate at +30°C. The unit offers frequencies up to 80 MHz, a frequency stability of +/-5 x 10–8 and an operating temperature range of 0° to +60°C. Price: $85 each (10 MHz model) (1000). Delivery: stock to eight weeks.
Arlington Heights, IL
1 - 100 MHz TCXOs
The MTXO series temperature-compensated crystal oscillators (TCXO) offer frequency stability of +/-1 ppm over an operating temperature of 0° to +70°C, making the devices suitable for use in digital communications, and cellular and mobile radio base stations. The units operate from 1 to 100 MHz and are available in TTL/HCMOS or sine wave output versions. Electrical frequency trimming is provided (no internal trimmer). The units are supplied hermetically sealed in a 14-pin, DIP-compatible metal package.
M-tron Industries Inc.,
(605) 665-9321 or (800) 762-8800.
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