Synthesised 1 GHz RF generator offers wide range

The TGR1040 is a low-cost synthesised signal generator which incorporates the essential features required for most RF development, test and service work

The TGR1040, new from TTi (Thurlby Thandar Instruments), is a low-cost synthesised signal generator which incorporates the essential features required for most RF development, test and service work: namely, frequency accuracy and stability, wide dynamic range, low phase noise and low leakage.

The TGR1040 provides an amplitude range of -127 dBm to +7 dBm (0.1 æV to 500 mV into 50 ohms).

Setting resolution is 0.1 dBm or 0.01 uV.

Output level steps can be set anywhere between 0.1 dBm and 100 dBm (or 0.01 uV to 100 mV depending on the entry mode).

Stepping the level is useful for quick assessment of circuit linearity and dynamic range, for instance.

The instrument uses a fully synthesised source locked to a temperature-compensated crystal oscillator.

This provides excellent signal frequency stability against temperature and aging.

The frequency can be set to a resolution of 1 kHz across the whole frequency range of 10 MHz to 1000 MHz, yielding a precision of 1 part in 106 at 1 GHz.

Stability is ñ2 parts in 106 over a temperature range of 5C to .

The generator provides both internal or external FM modulation using either the internally generated 1 kHz modulator signal or an external signal in the range 300 Hz to 50 kHz.

This wide bandwidth allows for audio-band demodulator testing as well as LF digital modulation.

The TGR1040 provides full remote-control facilities for all its functions.

An RS-232 interface is provided as standard, and a GPIB (IEEE-488.2) interface is available as an option.

In addition, it can store nine full instrument set-ups in non-volatile memory.

This allows repetitive testing procedures to be undertaken quickly and accurately.

The generator is suitable for FM analogue or digital radio-receiver sensitivity measurements, system gain measurements, oscillator substitutions, EMC/antenna/field-strength measurements and as a signal source for many other RF circuit and system development tasks.

In addition, the generator's low cost, ease of use and remote control make it eminently suitable for most production and development applications where a basic, stable signal source is required.

The TGR1040 costs £1195 (plus VAT) in the UK.

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