VXI 3002 - Manual (Page 20)

1-1
Chapter 1
GENERAL INFORMATION
Contents
Introduction ................................................................................................................................. 1-1
Main features ............................................................................................................................... 1-1
Performance data ......................................................................................................................... 1-3
Versions, options and accessories................................................................................................ 1-6
Introduction
The 3002 is a C size, message-based VXI signal generator covering the frequency range 9 kHz to
2.4 GHz. The RF output can be modulated in amplitude, frequency or phase using internal or
external signal sources. Additionally pulse modulation may be applied externally. An internal AF
source is capable of generating simultaneous two-tone modulation. The 3002 is 2 slots wide and
conforms to revisions 1.3 and 1.4 of the VXI specification.
Main features
Frequency selection
Carrier frequency resolution is 1 Hz across the band. A series of carrier frequencies can be stored
in non-volatile memory for recall when required.
Output
RF output up to +25 dBm (uncalibrated above 1.2 GHz) can be set with a resolution of 0.1 dB over
the entire range. Carrier output can be completely disabled.
An electronic trip protects the generator output against reverse power of up to 50 W. This prevents
damage to output circuits when RF or DC power is accidentally applied to the RF OUT connector.
To facilitate testing of receiver squelch systems, an attenuator hold function allows control of the
RF output without introducing RF level drop-outs from the step attenuator.
The RF output level can be offset by up to ± 5.0 dB to compensate for cable or switching losses, or
to standardize a group of instruments.
The maximum RF output level can be set so as to protect sensitive devices connected to the RF
OUTPUT socket.
Spectral purity
With an SSB phase noise performance of typically -121 dBc/Hz at 20 kHz offset from a 1 GHz
carrier, this instrument can be used for both in-channel and adjacent channel receiver
measurements. Harmonically related signals and non-harmonics are better than -25 dBc and
-60 dBc respectively.
Modulation
Comprehensive amplitude, frequency and phase modulations are available. Pulse modulation can
be applied to the carrier from an external pulse source. The instrument also accepts one or two
logic level inputs to produce a 2-level or 4-level FSK modulated output. An internal modulation
oscillator is provided, having a frequency range of 0.01 Hz to 20 kHz. The oscillator is capable of
generating one or two modulation tones simultaneously in one modulation channel. An
independent BNC input on the front panel allows external modulation signals to be combined with