The Radio Test Set 2965 provides a comprehensive measurement
system for ail types of mobile
radio testing applications, including personal mobile radio
(simplex and duplex) and cellular
systems. It is suitable for making high performance radio
system measurements in research and
development, production and maintenance.
A high-performance, full-span RF spectrum analyzer with
tracking generator is provided. This
has features to enable component and sub-unit testing in
addition to precision transmitter
measurements. A 20 Hz to 40 kHz AF spectrum analyzer is
provided to ensure total
The large, bright display has soft keys at each side and
beneath it. With the logical layout of the
dedicated keys, this allows the many types of measurements
of which the test set is capable to be
carried out quickly and easily.
An important operating feature is the ability to use several
forms of automatic control and
interfacing standards. These include IE E E 488.2 and RS-232
remote control as well as a parallel
The main facilities and features of the test set are listed
below. These and the many minor
features are explained in the operating instructions at the
1 GHz signal generator
The 2965 contains a high-performance signal generator with
an oven-controlled crystal oscillator
reference which has an ageing rate of less than 2xl0-7/year.
It has a fast switching speed and a
usable output up to 1.1 GHz. The maximum output is +13 dBm
with an accuracy of ±1.5 dB.
Comprehensive LF generators
There are three modulation and three audio sources
internally. These can generate signals
between 20 Hz (modulation) or 1 Hz (audio) and 20 kHz in
addition to signalling tones and data.
The souses can be combined to produce a single source with
range of 1 Hz to 100 kHz.
There is provision for simultaneous measurements on a
transmitter and a receiver with no limit to
the frequency offset between them.
Broad-band power meter
There is an accurate power meter for measurements over the
range 1 mW to 150 W with an
accuracy of ±7%. The accuracy is traceable to international
Selective power meter
Selective power measurements are possible with a sensitivity
of -90 dBm. This allows power
measurements to be made on selected channels with multiple
50 W continuous power rating
The test set can handle up to 50 W continuous power on its
N-type connector RF in/out port and
up to 150 W for short periods of time.
RF power protection
The sensitive TNC connector RF in/out port is protected from
accidental overloads up to 10W.
This avoids unnecessary repair bills and wasted time.
Full span spectrum analyzer
There is a full-span spectrum analyzer to 1 GHz with
centre-span and 80 dB dynamic range.
The spurious and harmonic performance of a radio can be
measured with auto and user-selected
This is operative over the full range of the spectrum
analyzer. The tracking generator has a
variable output level. Measurements can be made on filters
and duplexers and in RF circuit
development applications. Additionally, offset sweep is
available for mixer and IF testing, for
both up and down conversions. Doubler (x2) and divider (4-2)
functions are also available.
Fast audio analyzer
There is a comprehensive analyzer for audio input and
demodulated R F input signals up to
40 kHz with a minimum span of 50 Hz and a dynamic range of
60 dB. Because it uses an FFT,
harmonic and spurious analysis can be performed very
quickly. Two markers with full
annotation are provided. A stepped audio signal is available
up to 20 kHz for audio circuit
500 kHz digital storage oscilloscope
There is an oscilloscope that is operative up to 500 kHz. It
can be used to look at the
demodulated audio signal. The trace can be stored and the
results can be read over the bus or
printed out. There are two markers with full annotation for
measuring rise and fall times.
There is provision for measuring voltage, current and
resistance, and for continuity testing.
The multimeter also has the advantage that it can be
controlled over the bus, so can be included
in an automatic test system..
Comprehensive range of demodulation and audio filters
A 300 Hz to 3.4 kHz band-pass and 300 Hz, 5 kHz and 20 kHz
low-pass filters are provided. In
addition to these, CCITT and С-message (CM ESS) psophometric
filters are provided.
Rx=Tx Key ,
This is used tcf set the signal generator frequency to match
the transmitter frequency
automatically. This saves time and effort when making
simplex radio measurements. A duplex
offset can also be set for when the transmitter and receiver
frequencies are different.
It is possible to set up the frequency of the first channel
and the channel spacing. Then, instead
of having to set a particular frequency, a channel number
can be entered.