Trigger 34 Description
Sequence: C19,...
Trigger 34 ( 1 MHz HF-WBR )
This trigger is designed to produce High-Frequency (HF) Wideband Receiver data at 1 MHz.
Data acquisition continues only for the MFR. The HFR is placed in millisecond mode at
1 MHz during this trigger's operation.
This trigger turns on compression of the WBR data, and sets the snapshot length
to 2048 samples. The HFR millisecond mode sample set size is set to 2048. Once
per minute, for a period of 10 seconds, the WBR is paused, and the millisecond
mode of the HFR is also paused, while the HFR does a single spectrum in the
composite mode survey (CMS), described below.
| Receiver |
Frequency Range |
Sensor |
Time between Snapshots |
Samples per Snapshot |
| MFR |
25 Hz - 12 KHz |
EX, BZ |
32 seconds |
| HFR |
1.025 MHz |
EX |
2.5 seconds |
2048 |
| WBR |
1.01-1.04 MHz |
EX |
0.125 second |
2048 |
Once per minute the HFR is allowed 10 seconds to do an analysis in the
so-called composite mode survey mode. This mode is defined by:
Correlations Channels Integ. Size Frequency
Band Ant. Auto- Cross- per Band df Period Rep Steps kHz Start - Stop
---- ---- ----- ------ -------- -- ------ --- ----- ---- ------------
ABC 2E y y 16 n 1000 1 3.6-319 kHz
H1 2E y 2 n 80 1 30 50 325k-1.8MHz
H2 1E 1 n 20 1 72 200 1.8M-16MHz
Bands ABC require 3.16 sec to complete, H1 requires 2.524 sec, and H2 requires
1.461 sec for a total of 7.25 sec per sweep.