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WorkHorse H-ADCP Operation Manual
May
2015
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 163
PT6 - Receive Bandwidth
This test measure the receive bandwidth of the system. The bandwidth varies with system frequency and
the WB command setting.
>PT6
Receive Bandwidth:
Sample bw bw bw bw bw
rate expect Bm1 Bm2 Bm3 Bm4
307 120 91 93 88 88 Khz
results PASS PASS PASS PASS
The H-ADCP should be in non-moving water during this test to get valid test results.
Table 27:
PT6 Receive Bandwidth Nominal Values
Bandwidth setting
WB command
300 kHz
600 kHz
Broad
0
79
200
Narrow
1
14
40
Beam fails if <50% or >125% of nominal value.
PT7 - RSSI Bandwidth
This test checks the RSSI filter circuits are working. Values listed are the indicated RSSI sampled at 1-ms
intervals after a “listen” ping.
>PT7
RSSI Time Constant:
RSSI Filter Strobe 1 = 38400 Hz
time Bm1 Bm2 Bm3 Bm4
msec cnts cnts cnts cnts
1 6 6 7 8
2 11 12 14 15
3 15 16 19 20
4 20 21 23 25
5 23 24 27 28
6 26 27 30 31
7 28 29 32 33
8 30 31 34 35
9 32 33 36 37
10 34 35 37 38
nom 43 43 42 43
result PASS PASS PASS PASS
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