Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
4.6 TRANSMIT FUNCTIONS
This section covers the configuration requirements related to the transmit functions of the 9785. The
user must select the transmit frequency, the transmit power level, and how to combine the two keying
input signals.
4.6.1 TRANSMIT FREQUENCIES
The user must know what transmit frequency is required for the system. Both the Transmitter Module,
which generates the carrier, and the Output Filter, must be configured. There are four Output Filters
available to cover the specified 30 to 535 kHz carrier frequency range. Normally only one filter is
required per installation. Three of the Output Filters have jumpers to select one of three frequency
bands within the overall range of the Module. See Section 9 for details on selecting and configuring
the Output Filter. The Transmitter Module must be set to generate the required carrier frequency.
There are three banks of direct-reading rotary switches on the module. The middle bank contains five
switches which are used to set the center frequency of the system with 10 Hz resolution. The other two
banks of switches are used only in FSK systems. See Section 7 for more information on the
Transmitter Module.
4.6.2 TRANSMIT POWER
The system can be configured for a 1W, 3W, or 10W transmit level. The output level is configured
using switches SW1-3 and SW1-4 on the AM Logic Module. See paragraph 6.3.2 for more
information. Note that for systems with external power amplifiers, these settings will be scaled by the
external amplifier.
NOTE
The 1W and 3W configurations are for special applications only and
are not compatible with the voice option.
4.6.3 KEYING MODES
The 9785 can be configured for normally energized or normally de-energized start and stop inputs.
This is configured using switches SW1-1 and SW1-2 on the AM Logic Module. See Paragraph 6.3.1
for more information.
4.6.4 TX VOICE
If the system is configured with the voice option, the transmission of voice signals can be enabled or
disabled using switch SW1-5. See paragraph 6.3.3 for more information.
RFL 9785 RFL Electronics Inc.
March 24, 2008 4-8 (973) 334-3100
To Next Page
Loading...
