Page 4-10 V10/V7.5/V5/V3.5 Installation and Operation Manual
Issue 3.5 Section 4 Testing and Adjustment
(b) The RF output, as displayed by the RF
KILOWATTS meter and GUI, will be
rated power. The system diagram’s
External Alarm lamp will be off.
(c) The remote interface PWB’s INTLK
OPEN ALARM terminal (TB1-5) will be
a non-alarm condition (open-collector).
(d) Simulate an external interlock fault by
temporarily removing the jumper
installed between the remote interface
PWB's XMTR INTLK terminals (TB1-1
and TB1-2).
(e) The RF output, as displayed by the RF
KILOWATTS meter and GUI, will
immediately go to 0 W. The system
diagram’s External Alarm lamp will
turn on.
(f) The remote interface PWB’s INTLK
OPEN ALARM terminal (TB1-5) will be
an alarm condition (current-sink-to-
ground).
(g) Restore the integrity of the external
interlock circuit by reinstalling the
jumper between the remote interface
PWB's XMTR INTLK terminals (TB1-1
and TB1-2).
(h) The RF output, as displayed by the RF
KILOWATTS meter and GUI, will
return to rated power. The system
diagram - External Alarm lamp will
turn off.
(i) The remote interface PWB’s INTLK
OPEN ALARM terminal (TB1-5) shall
return to a non-alarm condition (open-
collector).
4.3.6.2 Exciter Auto Changeover Check
(if applicable)
If the transmitter is configured for dual
exciter operation, verify an exciter auto
changeover is initiated when a main
(active) exciter fault occurs as follows:
(a) Verify there are no existing alarms on
the control display panel and that the
transmitter is operating at rated power.
(b) From the GUI’s changeover menu (see
3.6.13), set the Exciter Standby
option to Y (yes).
(c) Unplug the ac cord at the rear of
exciter A (A14). A changeover to
exciter B will occur. The exciter alarm
will turn on momentarily (until the
reserve exciter’s output power exceeds
the IPA Input Low threshold), the
system diagram Changeover alarm
will turn on and the alarm will be noted
on the GUI. The remote interface
PWB’s CHGOV (changeover) ALARM
(TB1-8) and IPA/RF Fail Alarm (J6-3)
outputs should be an alarm condition
(current-sink-to-ground). The remote
interface PWB’s EXCTR STATUS
output (TB1-15) will be a current-sink-
to-ground.
(d) Reconnect the ac line cord to exciter A.
In the GUI’s changeover menu, set
exciter B as the main exciter (see
3.6.13). The alarms should clear.
(e) Unplug the ac cord at the rear of
exciter B (A15). An exciter changeover
to exciter A will occur. The exciter
alarm will turn on momentarily, the
Changeover alarm on the system
diagram will turn on, and the exciter
changeover alarm will be noted on the
GUI. The remote interface PWB’s
CHGOV ALARM (TB1-8) and IPA/RF
Fail Alarm (J6-3) outputs should be an
alarm condition (current-sink-to-
ground). The remote interface PWB’s
EXCTR STATUS output (TB1-15) will
be an open-collector.
(f) Reconnect the ac line cord to exciter B.
In the GUI’s changeover menu, set
exciter A as the main exciter (see
3.6.13). The alarms should clear.
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