Sea Air and Land Communications 1262 Benutzerhandbuch
12-62 SYNTHESIZED NRZ TRANSMITTER USER’S MANUAL
Issue 1262UE 1008
Sea Air and Land Communications Ltd
Page 1
12-62 POCSAG
PAGING TRANSMITTER
1.0
DESCRIPTION
The 12-62 is a 138 - 174 MHz (VHF) or 427.5 - 475 MHz (UHF) 4 watt POCSAG
paging transmitter with an in-built encoder. All parameters are programmable such as:
frequency, power output, deviation, POCSAG or NRZ data transmission.
paging transmitter with an in-built encoder. All parameters are programmable such as:
frequency, power output, deviation, POCSAG or NRZ data transmission.
The unit can be controlled via a USB port or an RS232 serial interface to provide
numeric, alphanumeric and tone-only POCSAG encoding. This enables a user to call
a pager (over 2,000,000 codes), append an appropriate priority level (1 of 4), and add
a numeric or alphanumeric message.
numeric, alphanumeric and tone-only POCSAG encoding. This enables a user to call
a pager (over 2,000,000 codes), append an appropriate priority level (1 of 4), and add
a numeric or alphanumeric message.
The 12-62 supports multiple message queuing, and will queue up to eight 240
character messages, or as many smaller messages that will fit into the available
memory buffer (up to 80). Pre-defined input messages are limited to a maximum
length of 40 characters which may be configured using the Salcom programming
software. Control via the USB or Serial port is achieved using ASCII character
commands.
character messages, or as many smaller messages that will fit into the available
memory buffer (up to 80). Pre-defined input messages are limited to a maximum
length of 40 characters which may be configured using the Salcom programming
software. Control via the USB or Serial port is achieved using ASCII character
commands.
The unit supports 4 discrete inputs with a different pre-programmed message on high
and/or low transition, plus voltage detection messages on the power input.
and/or low transition, plus voltage detection messages on the power input.
The inputs can be configured for a number of options. Provision to transmit a
message more than once and variable time between transmissions are catered for.
message more than once and variable time between transmissions are catered for.
The USB port or the RS232 serial port can be used to initiate paging transmissions
using the SALCOM propriety protocol, Paging Entry Protocol (PET) or Telocator
Alphanumeric Protocol (TAP) PG1 protocol. These ports can be used concurrently
making it possible to connect a telephone interface unit and still initiate paging
transmissions via the USB port.
using the SALCOM propriety protocol, Paging Entry Protocol (PET) or Telocator
Alphanumeric Protocol (TAP) PG1 protocol. These ports can be used concurrently
making it possible to connect a telephone interface unit and still initiate paging
transmissions via the USB port.
Over temperature cutout:
If the transmitter operates for extended periods in a hot
environment, a protective thermal cutout may operate to reduce the output power to a
safe level. It will reset when the unit temperature has fallen to below 70 deg.
safe level. It will reset when the unit temperature has fallen to below 70 deg.
Transmitter Duty cycle:
The transmitter duty cycle is rated as 50% with a max ‘on’
time of 5 minutes. Higher duty cycles may be possible. Contact Salcom for advice.