General Information 1250 Frequency Response Analyzer
1-4 CWB / 1250_Op / Issue 9
1.3 THE INSTRUMENT ESSENTIALS
The three main sections of the 1250 are:
1. A Generator which produces a sinusoidal, square, or triangular-wave electrical
stimulus for the system on test.
2. Two analyzers which measure the response to the stimulus at two points in the
system, enabling either of the following to be calculated and displayed:
a) Single Point measurements (i.e., the absolute voltage of either Channel, and its
phase with respect to the Generator) as shown in Fig. 1.3:
Figure 1.3 - Single Point Measurements
b) Point-to-Point measurements (e.g., the response of Ch.2 with respect to Ch.1, in
terms of gain and phase shift) as shown in Fig. 1.4:
Figure 1.4 - Point-to-Point Measurements