Company Confidential
19
Raveon Technologies Corp.
6. Using the M8S-VM MURS version
This section describes the operation of the M8S MURS version
.
The five MURS authorized frequencies (47 CFR 95.632) and associated channel
emission bandwidths (47 CFR 95.633) are:
1: 151.820 MHz
(11.25 KHz bandwidth)
2: 151.880 MHz
(11.25 KHz bandwidth)
3: 151.940 MHz
(11.25 KHz bandwidth)
4: 154.570 MHz
(20 KHz bandwidth)
5: 154.600 MHz
(20 KHz bandwidth)
The ATHP command can be used to change between these 5 frequencies.
The M8S-VM MURS band transmit power is limited to 2 watts maximum.
The ATFX and ATFT commands do not change frequencies in the M8S-VM MURS radio modem.
When using the narrow channels (1, 2, 3) set the over-the-air baud rate to 2-level 4800 baud (
ATR2
3
) or slower if desired.
When using the wide channels (4, 5) set the over-the-air baud rate to 2-level 9600 baud (
ATR2 5
) or
slower if desired.
The M8S-VM radio modems are exclusively MURS frequencies radios. These devices also comply
with FCC Rules Part 15.
Operation is subject to the following two conditions:
1. This device does not cause harmful interference.
2. This device does accept any interference received, including interference that may cause
undesired operation. FCC License is not required.
This device operates on frequencies authorized for use in the Multi-Use Radio Service (MURS).
MURS frequencies are available for unlicensed business or personal use.
To comply with FCC requirements, transmitter adjustments should be made only by or under the
supervision of a person certified as technically qualified to perform transmitter maintenance and
repairs in the private land mobile and fixed services as certified by an organization representative of
the user of those services.
Do not Replace any transmitter component (capacitor, semiconductor, etc.).
7. Using the M8S in Paging Mode
This section describes the operation of the M8S when it is in the
paging receive
mode.
There are two ways to configure the M8S to operate as a paging receiver. The
M8S may be configured to use just one protocol 100% of the time as defined by
the
ATMT
command. Or, the M8S
may be configured with a second “Alternate
Protocol”, that may be selected using the input pin 15.
1.
Configured by Command
. With ATMA set to -1 to disable the
alternate protocol, the ATMT command will select the current operating
mode, either data modem or paging.
ATMT 0
selects data modem
