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 10

: When the 12-62 has exceeded the max on air continuous

transmission time, the Min OFF Air setting controls how long the transmitter
will remain powered down before allowing transmission to continue.

: The lead in defines how long the transmitter carrier will be present

before data transmission commences.

: The lead out time controls how long the transmitter will remain on

air after data transmission has finished.

: Configures the transmission frequency.  Note that the selected

frequency must be evenly divisible by the channel spacing.

: Defines the frequency step resolution.

: The power level to transmit at.  Note that the power will

be reduced when the 12-62 exceeds 70 degrees.

How much the selected frequency deviates by when transmitting

data.  Note the custom setting is not to be used unless the 12-62 has been
factory set to support this option.

: If external modulation has been selected then no serial or input

controlled messages will be sent, data transmission is solely controlled by the
PTT and Modulation inputs on connector P2.  When internal modulation is
selected then the PTT and modulation inputs do not serve any purpose.

: Controls the serial response when a page has been

transmitted.  Historically “Page Sent” would be sent by Salcom products to
the serial port to provide a controlling application with feedback that another
message may be submitted for transmission.  Since the 12-62 may queue
many messages “Page Sent” may not describe sufficiently which page has
been transmitted.   Selecting “[Sent] + Message” will allow feedback to the
user which message has been transmitted, but may introduce backwards
compatibility problems with applications supporting other Salcom products. 
Selecting “Custom” will allow any user defined response up to 40 characters
in length.  Selecting “None” will result in no serial feedback on completion of
a message transmission. 

PSD Reset Options
Selecting Options-Reset to Factory Defaults will allow the user to restore the
12-62 to it’s original factory state.  This option will not affect any factory
calibrated settings.

   The current 12-62 configuration can be saved

12-62 SYNTHESIZED NRZ TRANSMITTER USER’S MANUAL

Issue 1262UE 1008

Sea Air and Land Communications Ltd

Page 11

using File-Save.   Previously saved configuration files can be loaded and
edited with, or without a 12-62 connected.

   To use the 12-62 with the Salcom 11-36 telephone

interface,  Salcom protocol must be selected.  Once selected, 11-36 support
can be enabled by selecting Options->General->Enable 11-36 support. 
When enabled, the “Preset Messages” and “Pager Database” pages will be
available under Options->11-36 Support.

     

+13.5 V nom, +11.5 V to 15.2 V

VHF: 138-174MHz             UHF:  427.5-475 MHz

Full range with no tuning

12.5 KHz or 25 KHz

7 settings, 50mW to 4W ± 1 dB 50Ω 

Standby : 40 mA     Transmit: 1.2A approx

Carrier FSK with  NRZ data

±2.25kHz or ±4.5kHz

512, 1200 Baud

POCSAG

-37dBm or less

S2, pins 1, 2, RS-232 (DCE), 9600 baud
no parity, 8 data bits, 1 stop bit

SALCOM proprietary, PET (PG1)

Pulled up to +12v (47K), ground to activate PTT on P2 pin 6.  
External modulation on S10, pin 8

PTT sink, 50mA on S10, pin 1

155 x 101 x 30mm

AS/NZS4769, EN 300 224, FCC Pt 90

Up to 50%, max  5 minutes ‘on’ time.

PO Box 22-621, 120 St.Asaph Street, Christchurch, New Zealand

Phone: (03) 379-2298    Fax: (03) 365-1580    Email: info@salcom.co.nz