Options 1250 Frequency Response Analyzer
15-2 AMK/1250/2
15.1 SYNCHRONISER UNIT 12501*
15.1.1 INTRODUCTION
Measurements may have to be made on devices which cannot be stimulated from the
1250 Generator, for example, the rotating shaft of a gearbox. In this case, the 12501
Synchroniser Unit can be used to lock the 1250 measurement frequency to that of the
system under test. The 12501 must be connected to some point on the system under
test from which a synchronising signal can be taken.
To enable the 12501 to be operated, the 1250 must contain at least Issue 4 software.
The Issue may be determined from the Front Panel by using Self Test (see Chapter 14,
Section 2 "Self Test") or by looking at the ROMS, IC22 to IC29 inclusive, on Processor
Board 22, which should be Issue DA or higher.
15.1.2 DESCRIPTION
The 12501 consists of:
a. A single printed circuit board, bearing on the component side the Type Number in
silk-screened notation, and the Serial Number on a label.
b. A metal panel carrying two sockets, connected to a lead with a polarised 4-pin plug
on the other end. The sockets may be either 4mm or BNC type.
c. A length of ribbon cable with DIL plugs at each end.
15.1.3 INSTALLATION
A 12501 ordered with a new 1250 will be installed and tested at the factory. When the
12501 is to be added to an existing 1250, installation must be performed by a Solartron
engineer.
15.1.4 CONNECTING UP
Connect a screened lead from the HI and LO sockets to the take-off point for the trigger
signal on the system under test.
* Not available for 1250N
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