User manual

16
Termination Impedance Switch
Termination Impedance is necessary when two (2) channels of power are connected (whether between two (2) PS20s, or on
the same unit). When connecting channels, the termination switch should be set at 400Ω, so it equals 200Ω on each channel.
For more information on termination impedance, see “Termination Impedance” on page 12.
Program Input
If a program source is connected to the PROGRAM INPUT connector on the back of the PS-20, it may be routed to either
CH1, CH2 or both using the CHANNEL SELECT switch. Use the LEVEL control to adjust the program level on the selected
channel.
NOTE: In 4-channel mode, the program input is routed to CH2, CH4, or both. For more information, see Figure 5 on
page 11.
Maintenance
Safety Considerations
Service should be performed only by qualified service personnel.
Any adjustment, maintenance, and repair of the opened equipment while any power or voltage is applied should be avoided as
much as possible, and should be carried out only by a skilled person who is aware of the hazard involved.
It is possible for capacitors inside the equipment to still be charged even if the equipment has been disconnected from its
power source.
Access
To open the PS-20, do the following:
1. Remove the screws on the top and bottom covers.
2. Slide covers off toward the back of the unit.