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OP-170-E USER'S MANUAL
The echo phase is fixed, ranging between 0° and 359.9° in 0.1° steps.
The Doppler frequency has a valid range of —830 Hz to +830 Hz in +0.1 Hz steps.
Note that, depending on the output frequency in use (36 MHz IF or RF), the same
baseband Doppler frequency may correspond to different vehicle speeds.
The 8 MHz channel loaded by default at start-up corresponds to the following
amplitudes and delays. This is a 6-ray approximation to the 21-ray fixed reception
(Ricean) channel F1 defined in Appendix B of the DVB-T specification ETSI EN 300
744.
Delay τ
Tap
1
-
2
0.4
3
0.7
4
2
5
2.7
6
3.2
Table 1: 6-ray approximation to channel F1 defined in ETSI EN 300 744.
Channel P1 in the same Appendix of the DVB-T specification can be closely
approximated using the following tapped delay profile:
Delay τ
Tap
1
-
2
0.4
3
0.6
4
1.9
5
2.7
6
3.2
Table 2: 6-ray approximation to channel P1 defined in ETSI EN 300 744.
06/2006
(µs)
Amplitude A
(dBc)
n
n
0
—16.7
—18.5
—18.6
—21
—19.7
(µs)
Amplitude A
(dBc)
n
n
—8.9
0
—2.1
—4.6
—6.3
—6.9
Phase φ
(°)
n
0
20.8
156.9
351.1
231.7
354.1
Phase φ
(°)
n
195.3
0
125
333.6
210.1
164
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