User manual

12
Termination Impedance
When connecting two (2) channels on a PS-20, the termination switch must be set to 400Ω to account for double termination.
By setting the termination impedance at 200Ω over two (2) channels, the power load would decrease to
100Ω (1/200 + 1/200 = 2/200 = 1/100). However, by setting the termination switch to 400Ω when operating over two (2)
channels the impedance to each channel is increased to 200Ω (1/400 + 1/400 = 2/400 = 1/200). For more information on cable
wiring, see Figure 4 on page 10.
FIGURE 6. Termination Impedance Configuration Diagram