User Manual

MDR2400/5800-SR, Orion2410/5810-SRi and Orion 5825-SR
862-01881 Issue 12c Page 15
NOTE 1 Both RF Units in a link must be set to the same frequency channel plan (i.e.
A, B, C or D) and modulator type. Also note that the frequencies differ for different
transmit bandwidths, i.e. the frequency of channel A changes according to the transmit
bandwidth.
NOTE 2 Figure 4 reflects all the frequency bands that could be obtained with the
ORION5850 RFU. Pre-programmed frequency ranges in the radio firmware prevent
the user from selecting transmission options that will not meet FCC requirements.
Frequency [MHz]
5731 5774 5801 5844
ABCABC
Low Transmit Band High Transmit Band
Figure 4. Orion 5850 Frequency channel plans A, B and C. Refer to NOTE 2 above with
regards to FCC standards compliance of the different band plans.
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 RFU.
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 and Orion2410i Channel plan D channel
frequencies
Sub-band Center Frequency (MHz)
L 2410-2426
H 2458-2474