General Information 1250 Frequency Response Analyzer
1-8 CWB / 1250_Op / Issue 9
1.6 OPTIONS
All these are controllable from the 1250 Keyboard, as are the GPIB and Serial Interface.
1. Synchroniser (12501A)*: enables the 1250 to be synchronised to an external
source.
2. Modulator/Demodulator (1250A): enables the 1250 to be directly interfaced with
systems that require ac carrier inputs, or which produce ac carrier outputs.
3. Plotter Interface (12503A)*: enables the 1250 to plot the measured results on an
analog plotter. A digital plotter may be driven from the GPIB.
4. Auxiliary Generator*: an additional generator, synchronised to the main generator
but producing a signal in quadrature with it. If required, however, the two generators
can be in phase. Three variants of the Auxiliary Generator are available:
Cosine (Quadrature) - 12506A
Sine (In phase) - 12506B
Antiphase - 12506C
* - these options are not available with the 1250N. In the manual, any references to the
options are not therefore applicable to 1250N.
1250A, B and E can be fitted with up to three options, plus one auxiliary generator.
1254A can only be fitted with any one of the available options, and cannot use an
auxiliary generator.
With the exception of the 12503A (which is no longer available in Europe), all the
options are compliant with European EMC standards. Therefore 1250B, 1250E and
1250A remain compliant when fitted with these options.
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