e advantages. As mentioned above, this number is influenced system comparison, with one hop fading, the analogue microwave very strongly by certain assumptions regarding the system design, system seems to offer better performance than the digital. In part, in particular, by the NPR of the analogue microwave hop, as is this is because the analogue microwave hops used in the comparison shown in Figure 50.28. For example, if the NPR per hop is 53dB, have about 10dB lower (better) microwave receiver thresholds than the number becomes 26 hops. It also assumes that the majority of those of the digital hops. Also as might be expected, performance of the communications traffic is voice. Digital and analogue microwave systems 50/13 45000kbit/s, or 4 to 6 times the raw bit per second capacity of the 1E 12 Analogue microwave analogue FM microwave system. This comparison is shown in Low-mid slot Table 50.3. 1E 10 534 KHz Mid slot T-1 on digital 1248 KHz microwave Table 50.3 Comparison of approximately the same Top slot bandwidth and voice capacity analogue and digital 2438 KHz microwave 600 channel FM 64 QAM/81 QPRS analogue digital Received level (dBm) Bandwidth 10MHz 10MHz Voice Chan Cap Figure 50.27 High speed data (T-1) performance on analogue VS. digital microwave. 1 hop fading in a 13 hop Max Data Cap 11.52MBit/s 45.3MBit/s system. Digital microwave = DS-3, 10MHz BW. T-1 on T-1 Capacity 10DS-1s 28DS-1s analogue = 256 QAM modem. Analogue microwave = 600 channel, FM, 10MHz BW System Gain 110.4dB 103.5 (or 104dB) 100.00 In this table the digital microwave voice capacity is based on PCM voice channels. The analogue microwave data capacity is based on 19.2kbit/s per voice channel. The analogue microwave T-1 capacity is based on 1 DS-1 per Supergroup. Another comparison of data capacity might be done on a T-1 basis. 10.00 In that case, the 600 channel analogue microwave system has a capacity of 10 DS-1s, since each DS-1 occupies a minimum of one Supergroup or 60 voice channels. The digital microwave system used in the compar