Table of Contents
Lna State – Low Noise Amplifier in the High Sensitivity setting will amplify the incoming
signal and increase the chance of detecting weak signals. This is the default mode for the
LNA. In a high noise environment, such as at main tower where an AP might be located, it
can help to turn the LNA to High Immunity, which disables the LNA amplification. This
means the radio will not be trying extra to amplify the collocated RF noise. It will be more
difficult to detect weak signals, if at all, but enhance the probability to detect the stronger ones.
High Sensitivity – set when operating in a low noise environment with minimal radio
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interference
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High Immunity - set when operating in an environment with radio interference
Stale Packet Timeout - If the MAC is unable to transmit a packet in this time, it will drop the
packet. Milliseconds, DEFAULT = 1500, range from 0 to 65535.
Data Retries - Number of times to retry unicast data before declaring NACK. Valid values:
0—15, DEFAULT = 3.
NIC ID – ADVANCED SETTING - DO NOT CHANGE - Manual overrides of the NIC
identifier: DEFAULT = 0, means auto, not manual. Range of 0 or 400-500
Gateway ID - ADVANCED SETTING - DO NOT CHANGE - Manual overrides of the
NIC's gateway identifier: DEFAULT = 0, means auto, not manual Range of 0 or 65535.
ARP Cache – Disabled by DEFAULT. When enabled, the radio will respond to ARP requests
intended for other network devices with known addresses. It will not forward the ARP to the
intended device.
ADR Mode – Adaptive data rate mode controls whether the NIC will attempt to use different
modem speeds for different remotes. All downstream traffic uses the lowest rate; only
upstream traffic can use the variable rate. ADR setting is automatically learned by remotes, but
remotes modem must be set to Auto, or 125 for 125-250kbps, or 500 for 500-1250 kbps
operation.
125-250kbps – ADR will attempt to use the FHSS modems (125kbps and 250kbps) when
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trying to determin the best modem for the remote.
500-1250kbps – ADR will use the DTS modems (500kbps, 1000kbps, 1000W kbps, and
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1250 kbps) when attempting to determine the optimal rate.
none – ADR is not used and the static modem setting in nx-config is used for the modem.
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ADR Threshold – The threshold is an RSSI threshold. If the received signal is stronger than
the threshold the NIC will attempt to use a faster modem. ADR Threshold must be set for each
radio (Remotes and AP). This is advantageous in that you can run the majority of the network
in ADR mode, but if a particular remote has strong RSSI but difficult channel conditions, you
can effectively disable ADR on that specific remote by setting the ADR threshold artificially
low. DEFAULT = -70, range from -127 to 0.
Encryption Protocol – Encryption Protocol 2.0 provides the highest level of over the air
encryption security with a strong encryption key, but is not compatible with MCR-900 radios
running firmware earlier than 3.1.0. Encryption Protocol 1.0 provides compatibility with older
firmware by using the strong key when talking to units with firmware 3.1.0 and later, and a
less strong key when talking to units with firmware earlier than 3.1.0. DEFAULT 2.0. For
more information, refer to Product Bulletin PB15001_A, MCR-900 Encryption Issue
Resolution, available at
Store and Forward Mode
Basic configuration with defaults
The advanced configuration on an NX915 module operating as a Store-and-Forward device, shares the
same configuration as a Remote.
Interfaces / NxRadio ---> Basic Config / Nx Radio
106
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MDS Orbit MCR/ECR Technical Manual
MDS 05-6632A01, Rev. F
Table of Contents
Troubleshooting
