GENERAL INFORMATION
1-6
Sweep
The sweep capability of the 2050T Series allows comprehensive testing of systems. Four
parameters are used to specify sweep; start, stop, number of steps and time per step. These are
specified by the user, with upper and lower limits for the parameter values being dependent on the
function. The sweep markers menu is available by soft key selection on the sweep display,
allowing the placement of up to five user defined markers.
Non-volatile memory
The non-volatile memory allows 50 complete instrument settings, 50 partial settings, 100 carrier
frequency settings, 20 sweep settings and 20 signalling tone sequences to be stored for later use at
any time.
Programming
A GPIB interface is fitted so that all functions are controllable via the interface bus which is
designed to the IEEE Standard 488.2. The instrument can function both as a talker and a listener.
Software protection
To prevent accidental interference with the contents of internal memories, internal data is
protected by a secure key sequence.
Two levels of protection are offered, appropriate to the function being accessed. The most secure
is reserved for features which alter the calibration data of the instrument.
Spectral purity
With an SSB phase noise performance at of typically -122 dBc/Hz at 470 MHz (20 kHz offset),
the 2050T Series can be used for both in-channel and adjacent channel receiver measurements.
Harmonically related signals and non-harmonics are better than -30 dBc and -70 dBc respectively.
Calibration
The 2050T Series has a recommended two year calibration interval and is calibrated entirely by
electronically controlled adjustment. There are no internal mechanically adjustable components to
affect the calibration. The calibration display is available via soft key selection at the utilities
menu.
In both digital and vector modes a self calibration system optimises the performance of the vector
modulator. The instrument displays a warning when the calibration validity has expired.
Date stamping
After readjustment the instrument updates the calibration data and records the date of adjustment.
The calibration due date can be set and when this date is reached a message advises the operator to
return the unit for calibration.