Nautel GV20, Installation Manual

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GV20/GV15 INSTALLATION MANUAL COMMISSIONING
PAGE 2.9.2 VERSION 5.0 2021-03-01
Pre-Commissioning Tasks
1. Terminate the transmitter's RF output into a precision, 50

, resistive dummy load that is
adequately rated for the maximum expected total power output.
2. Verify that all panels are installed, and that their attaching hardware is firmly tightened.
3. Verify all program inputs are connected to the back of exciter A and optional exciter B.
4. 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 TB1-1 and TB1-2 of the
remote interface PWB (A16). Alternatively, you can apply a short circuit between pins 19 and 20 of
the
REMOTE I/O-A (A1J2A) connector on the rear of the controller (A4).
NOTE
: An interlock jumper (Nautel Part # 211-5060) is provided in the GV20/GV15’s ancillary kit. It is
intended to plug directly into the INTLK inputs (TB1-1 and 2), on the remote interface PWB (A16) or
into the REMOTE I/O-A (A2J5A) connector (pins 19 and 20), on the rear of the controller (A4). This
jumper cannot be used if you are using a D-sub connector to make other remote I/O connections to the
controller. Instead, you must solder a jumper between pins 19 and 20 of the mating connector (Nautel
Part # JS28, also provided in the ancillary kit).
5. Set the switch on the front of each RF power module to its ENABLE position.
WARNING! If a jumper is placed between the INTLK inputs [TB1-1 and 2 on
the remote interface PWB (A16) or pins 19 and 20 of the controller’s (A4)
REMOTE I/O-A connector (A2J5A)], 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.