1. 700 MHz Interoperability Channel Spacing NCC March 22-23, 2001 Washington, DC

2. Concern about Interference to I/O channels Shift I/O to center of 25 kHz block 40 dBc 60 dBc 60 dBc 65 dBc 40 dBc 60 dBc 60 dBc 65 dBc ACCP into 6.25 kHz blocks RESERVEI/O RESERVE General UseState Block GUARDGUARD GUARDGUARD 25 kHz = 4 x 6.25 kHz Original FCC Band Plan What NCC wants, based upon 4 th R&O General UseState Block What 4 th R&O gave us 12.5 kHz 700 MHz I/O Channel Shift w/ 4 th R&O Changes I/O 12.5 kHz RESERVE FCC ACCP specifications FCC ACCP specifications

3. C4FM into adjacent 6.25 kHz Bandwidth

4. TETRA into adjacent 6.25 kHz Bandwidth

5. C-QPSK into adjacent 6.25 kHz Bandwidth

6. Shift I/O to center of 25 kHz block I/OGeneral UseState Block GUARDGUARD GUARDGUARD 6.25 kHz, Separation between blocks General UseState Block 0 kHz, Separation Between blocks 700 MHz I/O Channel Shift I/O 12.5 kHz RESERVE

7. ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver vs. Spacing between Channel Edges Offending Transmitter Technology

8. 69 dB I/O 12.5 kHz 700 MHz I/O Channel w/o Shift I/O 12.5 kHz RESERVE C4FM (12.5 kHz center to center spacing) I/O 12.5 kHz RESERVE 64 dB Linear 4-slot TDMA (18.75 kHz center to center spacing) 66 dB Linear CQPSK (9.375 kHz center to center spacing) ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver (all exceed FCC ACCP specification of 40 dBc)

9. 69 dB I/O 12.5 kHz 700 MHz I/O Channel w/o Shift I/O 12.5 kHz RESERVE C4FM (12.5 kHz center to center spacing) I/O 12.5 kHz RESERVE 64 dB Linear 4-slot TDMA (18.75 kHz center to center spacing) 66 dB Linear CQPSK (9.375 kHz center to center spacing) ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver (all exceed FCC ACCP specification of 40 dBc) MODULATION RCVR ENBW

10. GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD 87 dB I/O 12.5 kHz 700 MHz I/O Channel w/ 6.25 kHz Shift I/O 12.5 kHz C4FM I/O 12.5 kHz 65 dB Linear 4-slot TDMA 68 dB Linear CQPSK ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver

11. GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD 87 dB I/O 12.5 kHz 700 MHz I/O Channel w/ 6.25 kHz Shift I/O 12.5 kHz C4FM I/O 12.5 kHz 65 dB Linear 4-slot TDMA 68 dB Linear CQPSK ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver MODULATION RCVR ENBW

12. ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers vs. Spacing between Channel Edges Victim Receiver Technology

13. 71.6 dB I/O 12.5 kHz 700 MHz I/O Channel w/o Shift I/O 12.5 kHz RESERVE C4FM (5.4 kHz Rcvr BW, 12.5 kHz center to center spacing) I/O 12.5 kHz RESERVE 71 dB Linear 4-slot TDMA (18 kHz Rcvr BW, 18.75 kHz center to center spacing) 45.7 dB Linear CQPSK (5.4 kHz Rcvr BW, 9.375 kHz center to center spacing) ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers WORST CASE

14. 71.6 dB I/O 12.5 kHz 700 MHz I/O Channel w/o Shift I/O 12.5 kHz RESERVE C4FM (5.4 kHz Rcvr BW, 12.5 kHz center to center spacing) I/O 12.5 kHz RESERVE 71 dB Linear 4-slot TDMA (18 kHz Rcvr BW, 18.75 kHz center to center spacing) 45.7 dB Linear CQPSK (5.4 kHz Rcvr BW, 9.375 kHz center to center spacing) ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers WORST CASE MODULATION RCVR ENBW

15. 88.3 dB I/O 12.5 kHz 700 MHz I/O Channel w/ 6.25 kHz Shift I/O 12.5 kHz RESERVE C4FM (5.4 kHz Rcvr BW, 18.75 kHz center to center spacing) I/O 12.5 kHz RESERVE 83.3 dB Linear 4-slot TDMA (18 kHz Rcvr BW, 25 kHz center to center spacing) 83.7 dB Linear CQPSK (5.4 kHz Rcvr BW, 15.625 kHz center to center spacing) ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD I/O 12.5 kHz I/O 12.5 kHz I/O 12.5 kHz MODULATION

16. 88.3 dB I/O 12.5 kHz 700 MHz I/O Channel w/ 6.25 kHz Shift I/O 12.5 kHz RESERVE C4FM (5.4 kHz Rcvr BW, 18.75 kHz center to center spacing) I/O 12.5 kHz RESERVE 83.3 dB Linear 4-slot TDMA (18 kHz Rcvr BW, 25 kHz center to center spacing) 83.7 dB Linear CQPSK (5.4 kHz Rcvr BW, 15.625 kHz center to center spacing) ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD I/O 12.5 kHz I/O 12.5 kHz I/O 12.5 kHz MODULATION RCVR ENBW

17. T R Adjacent Channel User I/O Channel User ‘bigger’ 40 dB ACPR ‘hole’ around I/O user ‘smaller’ 80 dB ACPR ‘hole’ around I/O user Relative Effect of power coupled into Adjacent Channel

18. +34.8 dBm (3 watts) - ACPR -3 dB portable A antenna - Free Space Loss - 7 dB Clutter -3 dB portable B antenna ------------- Interferer A Signal Level into Receiver B