Geophysical Survey Systems, Inc.
SIR® 30
Manual
MN 93-101 Rev E
20
Figure 23: Antenna channel descriptions.
ANTENNA(#)\CHANNEL
The antenna options correspond to the Channel 1-4 inputs on the back of the SIR 30. For each antenna
channel, the User can enter the Antenna Type (Center Frequency), the antenna model number, the antenna
dipole orientation i.e. the dipole polarity axis orientation relative to your profile direction, the antenna
serial number, the transmit rate, the transmit-receive mode and the GPR\GPS antenna distance offset
values.
•
The antenna serial number is required if you are using a Model 4105NR 2 GHz Horn with noise
reduction technology. The SIR 30 will use the provided serial number to select the correct Custom
filter file.
•
If you selected an antenna model, the SIR 30 will automatically load the maximum possible transmit
rate (abbreviated Xmit Rate) for that antenna. If you would like to set this manually, you must select
CUSTOM from the Antenna Type pull down menu.
Note:
In cases where the maximum transmit rate (or PRF) of the antennas is different, the SIR 30 will
use the highest transmit rate that is common to all antennas e.g. If two (2) antennas are connected to
the SIR 30 and one has a maximum PRF of 100 KHz and the other has a maximum PRF of 330 KHz
,the system will use the 100 KHz PRF rate.
•
TX-RX Mode allows the User to set the system for Standard transmit\receive mode, Bi-Static
transmit\receive mode (Transmitting from one channel\antenna to another channel\antenna), or Dual
Receiver Mode. (Transmitting from one channel\antenna to another antenna in b-static mode and one
channel in Standard transmit receive mode).
•
In-Line (X) and Cross-Line (Y) Offset are the offset distances from the GPS receiver antenna relative
to the GPR antenna connected to Channel 1
•
Clicking Accept will cause the data acquisition mode and antenna(s) to initialize and the display the
Data collection Control Screen.
Summary of Contents for SIR 30
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