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VS1 Installation Manual Commissioning tasks
Issue 2.0 2010-12-01 Page 8-1
Section 8: Commissioning tasks
The transmitter contains solid-state devices that may be damaged if subjected to excessive heat or
high-voltage transients. Ensure that circuits are not overdriven or disconnected from their loads while
turned on.
The transmitter was precisely calibrated and tested during manufacturing. Do not change any
adjustments other than those specified
Pre-commissioning tasks
1. Terminate the transmitter's RF output into a precision, 50
Ω
, resistive dummy load that is
able to dissipate 1400 W.
2. Verify all required program inputs are connected to the rear of the VS1.
3. Close the external interlock (if installed). If an external interlock is not installed, simulate the
closing of the external interlocks by applying a short circuit between pins 19 and 20 of the
REMOTE I/O-A (A1J2A)
connector on the rear of the VS1.
WARNING: Before applying ac power and turning on the transmitter,
you must customize some circuits to the station's power source and
operating requirements. Do not perform pre-commissioning unless
you are a station engineer or a competent electronics technician.
WARNING:
If a jumper is placed between external interlock pins 19 and 20 of the
REMOTE I/O-A (A1J2A)
connector on the rear of the VS1, safety features
controlled by the external interlocks will be disabled. A fail safe
method of alerting personnel to this fact should be implemented.
Voltages which are dangerous to life will be present on the RF output
stages and the antenna system if the transmitter is turned on.
Note:
An interlock jumper (Nautel Part # 211-5060) is provided in the VS1’s ancillary kit. It is
intended to plug directly into the
REMOTE I/O-A (A1J2A)
connector on the rear of the VS1.
This jumper cannot be used if you are using a D-sub connector to make other remote I/O
connections. Instead, you must solder a jumper between pins 19 and 20 of the mating connector
(Nautel Part # JS28, also provided in the ancillary kit).