Clear-Com PS-702 - Manual (Page 11)

P S - 7 0 2 T W O - C H A N N E L P O W E R S U P P L Y
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all the way down, decrease the program trim level. Any change in the
program trim level control on the rear panel to adjust for one channel will
necessitate adjustments on the other channel to compensate.
Note: Do not force the controls past their stop points as this will
damage them.
5. TEST TONE: This toggle switch turns on a test tone which can be heard
on either or both channels when the program send switch for that channel
is in the off position. It can be handy for identifying which intercom
channel is which or for other test purposes. The program send level
controls adjust the level of the test tone on each channel.
6. A+B LINK SWITCH and INDICATOR: This toggle switch links the
audio for channels A and B together. A yellow light indicates when the
channels are linked. It can be useful to have both channels linked for
rehearsals, but separated for performances.
7. INTERCOM LINE CONNECTOR and SWITCH: A single intercom
line connector is located on the front panel for convenience. It can be
switched between channels A and B with the associated toggle switch.
REAR PANEL
8. PROGRAM INPUT: This three-pin female XLR jack accepts a balanced
or unbalanced line-level signal. This is typically a feed from a mixing
console, an air feed from a studio to remote site over a phone line, or an
audio cue track. Send levels to the individual channels are controlled with
a combination of the program trim level and the program send levels on
the channels. This feed can be fed to either or both intercom lines.
9. AUDIO ADJUST: This control adjusts the overall input level of the
external program coming into the PS-702. It is used with the program
send level controls to achieve desired system program levels. Turn the
control clockwise to increase the gain and counter-clockwise to reduce it.
Note: Do not force this control past its stop points as this will damage
it.
10. TERM. ON/OFF: These switches (one per channel) select whether the
PS-702 will provide the required termination for each channel. These
should always be on unless there are other power supplies or terminated
main stations in the system. If there are other possible terminations in the
system, all but one must be turned off.
11. INTERCOM LINE CONNECTORS: There are three 3-pin male XLR
jacks per channel, wired in parallel, or looped through. All the stations in
the system are ultimately connected to the PS-702 through these jacks.
Because intercom audio is bidirectional, they are neither inputs nor
outputs, but may be thought of as “ports.” Pin #1 is connected to the
shield and carries the signal ground. Pin #2 carries the DC voltage that
runs the remote stations. Pin #3 carries two way audio and call signals.
12. AC POWER SUPPLY INPUT: Connects to AC with an IEC cable. The
PS-702 will accept any line voltage between 100 and 240 volts AC at
50 to 60 Hz. It will automatically adjust to the line voltage. There is no
need for a selector switch or an external fuse.