User's Manual

MDR2400-SR, MDR5800-SR and Orion 5825-SR
Issue 10 Page 18
2.2.1.5 Frequency Channel Plan D (FCC Compliant)
Frequency plan D allows independent control of transmit and receive frequencies.
This allows a flexible frequency plan and can be used to overcome interference in the
2.4GHz and 5.8 GHz ISM bands.
The frequencies that can be used in the lower or upper sub-bands can be selected in
1 MHz increments. Performance degradation can be expected when operating using
channel plan D mode with the chosen frequencies close to the sub-band edges i.e. a
choice of one of the high frequencies in the lower sub-band and one of the lower
frequencies in the upper sub-band.
The allocation of Channel plan D frequencies is shown in Table 4, Table 5 and Table
6.The Orion 5825 has up to three different sets of minimum and maximum
frequencies, which are determined by the data rate setting of the OU.
Only channel frequencies that are FCC compliant can be selected through the
configuration software. The channel frequency ranges are programmed into the radio
firmware and cannot be adjusted by the user.
The radios ware tested and approved for FCC compliance with the frequency ranges
below, see Figure 4.
Table 4. MDR2400 Channel plan D channel frequencies
Sub-band Center Frequency (MHz)
L 2410-2426
H 2458-2474
NOTE the allowable operation range in FCC countries, page 16.
Table 5. MDR5800 Channel plan D channel frequencies
Sub-band Center Frequency (MHz)
L 5735-5771
H 5804-5840
Table 6. Orion 5850 Channel plan D channel frequencies
Center Frequency (MHz)
RF BW [MHz] /
Data Rate
[kbps]
Lower Sub-band Upper / Higher Sub-band
2.6 / 8464 5731-5774 5801-5844
5.4 / 16928 5732-5773 5802-5843
8.0 / 25392 5734-5771 5804-5841
2.2.1.6 Orion 5850 Modulator Types
The Orion 5850 can operate with different modulator types, the trade-offs being better
radio performance versus higher data throughput. The changes can be made via
software, using either the Orion NMS / GUI or an SNMP client application.
Modulator types and frequency bands that were tested and approved for compliance
with FCC regulations are specified in Sections 2.2.1.4 and 2.2.1.5.