NOTE:
•
In 'FORCE' mode the unit is inoperative after a power down until either another valid FORCE
command is received, or until mode is changed by a GOCHAN, SETPAR or SETSER command.
FORCE mode does not apply any receive frequency offset.
•
•
•
•
Different values need to be sent when changing from transmit to receive and vice versa.
FORCE is intended mainly for test/diagnostic operation.
A pause of at least 50ms must be allowed between command strings (EEPROM programming time)
Modem mode
The 'modem' mentioned is a 1200baud RS232 semi-intelligent unit (Transmit keyed when valid serial data is
present, so no separate TX control needed. Coding in the datastream also permits the receiver to ignore
noise and only output valid serial data) This is a half duplex unit, so collisions between transmitted and
received packets must be dealt with by the user
If greater modem functionality is needed, then a version (SHZ1) is available which includes a full-function
M48A modem device inside the unit, replacing the i1200 functions (case height is increased by 3mm to
accommodate the extra circuitry). This "SHZ1" only operates in 'modem' mode (no parallel channel select, no
independent transceiver operation)
Ordering Information
Part No.
SHX1-144-5
Application
Channel
spacing
25kHz
Frequency band
(MHz)
144.000 - 146.000
Amateur Radio (e.g. APRS)
SHX1-151-5-12k5-MURS
SHX1-169-5-12K5
Multi-Use Radio Service
(MURS) in USA, Canada
12.5kHz
12.5kHz
CH0:151.820 –
CH4:154.600MHz
CH0:169.40625 –
CH15:169.59375
CH16:169.61875-
CH31:169.806250
CH0:169.412500-
CH7:169.587500
CH8:169.62500-
CH15:169.8000
Meter Reading, Asset Tracking
and Tracing
SHX1-169-5
25kHz
Radiometrix Ltd
SHX1 Data Sheet (preliminary)
page 5
RADIOMETRIX [ RADIOMETRIX LTD ]
