RF Technology R150 Instrucciones de operaciones descargar pdf (Pagina 4)

Page 4 RF Technology T70/T150

1 OPERATING INSTRUCTIONS

1 Operating Instructions

1.1 Front Panel Controls and Indicators

1.1.1 PTT

The PTT button is used to key the transmitter during system test and adjustment.

Audio from the line input is automatically disabled so that an unmodulated carrier

with sub-audible tone is transmitted.

1.1.2 Line

The LINE trim-pot is used to set the line and direct audio input level. It is normally set

to give 60% of system deviation with -6 dBm (388 mV ) input at 1 KHz. The level can

be measured between test socket pins 6 & 1 and adjusted for inputs of -30 to +10 dBm.

An internal jumper provides a coarse adjustment step of 20 dB. This, in conjunction

with the trim-pot, allows the level to be accurately set over a wide range.

1.1.3 Power LED

The PWR LED shows that the dc supply is connected to the transmitter.

1.1.4 TX LED

The TX LED indicates that the transmitter is being keyed, the synthesiser is locked

and the output amplifier is enabled.

WARNING

Changes or modifications not expressly approved by

RF Technology could void your authority to operate this

equipment. Specific

ations may vary from those given in

this document in accordance with requirements of local

authorities. RF Technology equipment is subject to

continual improvement and RF Technology reserves the

right to change performance and specification without

further notice.

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RF Technology R150 Instrucciones de operaciones Pagina 4