11-85
UHF POCKET PAGING
TRANSMITTER
OPERATOR’S
MANUAL
Sea Air and Land Communications Ltd, PO Box 22-621, 120 St Asaph Street, Christchurch, New Zealand
11-85 UHF POCSAG TRANSMITTER OPERATOR’S MANUAL Issue 1185UA 0104
Sea Air and Land Communications Ltd Page 1
11-85 UHF POCKET
PAGING TRANSMITTER
1.0 DESCRIPTION
The 11-85 is a UHF low power POCSAG paging transmitter with an in-built encoder.
The buttons initiate transmissions to provide numeric, alpha-numeric and tone-only
POCSAG paging, enabling a user to call a pager (approximately 2,000,000 codes),
append a priority level (1 of 4), and add a numeric or alpha-numeric message.
In addition to the front panel buttons, four discrete inputs are supported with unique
pre-programmed messages on low input transition. Provision to transmit a message
more than once is catered for and the time between transmissions is
programmable.
‘Beep’ Indicator: Audible ‘beeps’ accompany each key-push and all successful
transmissions. There are different beeps for an ‘out of lock’ transmission failure and
a distinctive beep for low battery accompanies each transmission.
Aerial: The 11-85 has an fixed external quarter wave helical aerial.
2.0 WARRANTY
Our Products are warranted for a period of 12 months from date of purchase
against faulty materials and workmanship. Should any fault occur the unit should
be returned to the vendor, freight pre-paid. Please include a description of the fault
to assist with prompt return. Any unauthorized alterations or repairs will invalidate
the warranty.
3.0 DISCLAIMER
All information provided in this document is carefully prepared and offered in good
faith as a guide in the installation, use and servicing of our products. Installers must
ensure that the final installation operates satisfactorily within the relevant regulatory
requirements. We accept no responsibility for incorrect installation.
We reserve the right to change products, specifications, and installation data at any
time, without notice.
Note: The 1185 should not be used for the control of industrial machinery where
a fail-safe mode of operation is necessary for the purposes of safety. Please
contact Salcom for advice where this is a requirement.
11-85 UHF POCSAG TRANSMITTER OPERATOR’S MANUAL Issue 1185UA 0104 11-85 UHF POCSAG TRANSMITTER OPERATOR’S MANUAL Issue 1185UA 0104
Sea Air and Land Communications Ltd Page 2 Sea Air and Land Communications Ltd Page 3
4.0 INSTALLATION Numeric transmissions
The unit can be attached to a wall or carried in a pocket. It is advisable to mount
the unit away from sources of heat, damp or vibration The power supply can be an
internal 9volt battery, or an external power source. The supply input is protected
against reversed connection damage. Wire connections can be made to the internal
connectors, and the wires can pass through the battery access hole, or provision
for a hole can be made in the side of the case.
5.0 OPERATION
To operate the unit press the front panel button until the LED indicates transmitter
operation. The LED will flash rapidly if a low supply is detected.
A number of factors can influence the range of the unit. The range can be optimised
by applying the following recommendations:
1. Ensure the path between 11-85 and receiver is as clear from obstructions as
possible.
2. Replace batteries when the flashing LED indicates low battery.
3. If handheld, hold the unit in the open with one hand as far from the body as
possible.
4. Do not fix the unit to metal surfaces so that it screens the radio signals. The
aerial must be clear of metal obstruction.
5. Some pager receivers do not respond as well as fixed receivers with external
aerials
6.0 OPERATING MODES
Sleep mode. This is the quiescent mode. In this state the unit consumes zero
power except for any residual current flowing in the discrete inputs. The unit will
stay in this mode until a button is pressed or a discrete input goes low.
Transmit mode. If an input is activated, the unit will enter the transmit mode to
transmit the message(s). The unit will return to the sleep mode after the message
has been sent.
7.0 TYPES OF PAGING MESSAGE
The 11-85 can transmit two types of POCSAG message, with any one of four
function levels:
Alphanumeric transmissions
Messages can contain any alphanumeric character . The 11-85 will accept the
standard ASCII 7 bit character set.
Messages can contain numeric characters and some symbols. These can convey
a telephone number, or other numerically coded information. The transmitted
message is shorter, and therefore there is a smaller chance of errors received by
the pager. The numeric character set is as follows:
0 1 2 3 4 5 6 7 8 9 [ ] - E U <space>
Note. The E may be displayed as P or * on different pagers
8.0 INITIATING TRANSMISSIONS
There are two ways of initiating a paging message transmission:
Button press: The 11-85 will remain in a sleep mode, with zero supply current,
until a button is pressed. This action will initiate a transmission as per the
configuration. Note that on single button units, only button 2 is used.
External Discrete Inputs: A transmission can be initiated from one of the four
external inputs with an input transition to LOW (connection to GND).
The 11-85 will remain in a sleep mode with zero supply current until a discrete input
is activated.
A low transition on any discrete input will wake the unit for approx one second.
Once the unit is activated, a message related to the particular input is sent and the
unit goes back to sleep.
9.0 BATTERY MAINTENANCE
A 9 volt alkaline battery should have capacity for
5 hours of transmission, or about 5000
messages of 3 seconds each.
If the battery voltage drops below 7 volts, the
LED will flash rapidly when operated. No battery
monitoring takes place in the sleep mode.
The internal 9 volt battery can be accessed by sliding back the battery cover on the
rear of the unit.
RECOMMENDED BATTERY PP3, MN1604, 6F22 9 Volt Alkaline
Loading...