GE MDS ORBIT ECR, Technical Manual

Page: 101 / 463

MDS 05-6632A01, Rev. F MDS Orbit MCR/ECR Technical Manual 101
Figure 3-45. ISM 900 (NX) AP Advanced Settings

Lna State – 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
interference (DEFAULT)
- High Immunity - set when operating in an environment with radio interference

Avoided Frequencies - Frequencies that are not included in the hop pattern. Decimal MHz in
the form of “###”, “###.#”, “###.##”, “###.###”, “###.####”. A range is required, with the
values separated by a hyphen, with or without spaces on either side. For example “902.2-910”
to block 8MHz on the lower portion of the band from 902-910 MHz. To block a single
channel enter a value like “915.615-915.615” . This ensures blocking the specified frequency
but depending on hop settings, may block other channels as well.