Harris Z3-48HD+, Техническое руководство

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1-10 888-2621-001 12/5/07
WARNING: Disconnect primary power prior to servicing.
Section I Operator Guide
Z3-48HD+
The REJ LOAD LED indicator is actually two indicators in one. One half of the
indicator is an amber LED, the other is a red LED. If the RF power delivered to the
combiner reject load associated with that System Controller exceeds a preset warning
level, usually 90%, the amber portion of the LED will illuminate. It will remain
illuminated until the RF level drops below the preset level. If the RF power delivered to
the reject load associated with that System Controller exceeds the safe operation level
for the load, the System Controller will terminate operation of the transmitters that feed
that particular load and the red portion of the REJ LOAD will be illuminated. It will
remain illuminated until the next ON command of that particular System Controller is
exercised.
1.3.4 Remote Control
The REMOTE/LOCAL push-button switch on the front panel of the System Controllers
allow the operator to determine if the unit will accept remote system level ON or OFF
commands. In the LOCAL mode (red LED illuminated) only the front panel switches
on the System Controller may be used to turn the system on or off. For normal
operation, the ZD32 System Controller should always remain in the REMOTE mode as
the Z3-48 System Controller uses the ZD32 remote inputs to control that portion of the
system.
Remote system level commands, status and metering functions are available at J1 and
J11 on the System Controller. System commands are active when the REMOTE/
LOCAL switch on the front of the System Controller is in the REMOTE position.
Status and metering information is always available at J1 and J11 regardless of the
position of the REMOTE/LOCAL switch.
Table 1-10 on page 1-17, System Controller Remote Connections, gives details of the
commands, status and metering functions available at J1 and J11 on the rear of both
System Controllers. It is recommended that J1 be used only for fail-safe/interlock and
J11 be connected to a remote control (if used) for remote metering, status, and
commands.
1.3.5 Interlock Considerations
In a hybrid combiner system, if the reject presents an open interlock, both transmitters
associated with that System Controller will be interlocked off. Once the interlock is
closed, an ON command is required to restore normal operation. The interlocks are
routed through the Reject Load interlock terminals. The 5kW load interlock is
connected to the ZD32 System Controller. The 10kW load interlock is connected to the
Z3-48 System Controller. Additional devises can be wired in series with the load
interlocks if required.