Options - Racal Instruments 2251A Operator's Manual

Universal timer/counter
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1.4

Options

1.4.1
The following options are available for use with the 2251A.
1.4.1.1 Option 02M: Control Interface Intermediate Language (CIIL) interpreter. This option allows
the 2251A to respond to the CIIL command set for use in MATE compatible test systems.
Refer to Model 2251A-02M manual, Publication No. 980667.
1.4.1.2 Option 10: External reference multiplier. This option allows the 2251A to be synchronized
to any integer sub-multiple of an external 10 MHz reference, e.g. 1, 2, 2.5, 5 MHz.
1.4.1.3 Option 11: This option provides a 0.1 ppm 10 MHz internal reference. The internal
reference is also output on the front panel for external use. Option 11 and Option 10
are mutually exclusive.
1.4.1.4 Option 41: Channel C. This option extends the frequency measurement range to 1.3 GHz.
Input C has a fixed input impedance of 50 ohms, and a bandwidth of 40 MHz to 1.3 GHz.
1-4
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