Ping Rate; Receiver Gain - Teledyne SeaBat T Series Operator's Manual

ACTIVE SONAR USAGE
6.2.2.2 Transmit Power and Pulse Type
Power level depends on pulse type:
 In CW mode, typically set Power at full for the most robust bottom detection at all ranges.
 In FM mode, the use of power may vary with range setting. Due to longer pulse lengths in
this mode, more overall energy is transmitted into the water per ping than in CW mode.

6.2.3 Ping Rate

Set the Max rate at 50p/s to ensure unhindered operation of the sonar. Note that this is only a
ping rate limiter.
The ping rate is automatically set by the range setting (or safe duty cycle limit) (see also section
6.2.1 above).
If Max rate is set to 0, the system will not ping or receive data.
If Max rate is set to a value higher than the range-determined ping rate (or the duty cycle-
determined ping rate), the sonar will ping at the rate determined by the range setting (or
calculated duty cycle).
If Max rate is set to a value lower than the range-determined ping rate, the sonar will ping at
the rate specified by Max rate.
In some instances it may be beneficial to force a lower ping rate than the normal rate associated
with a particular range. Examples of this would be instances when too much data is being
received at short ranges; when the vessel is moving at a very slow rate and the operator wants to
reduce the quantity of data generated; or when the sonar is operating in a high-reverb
environment where echoes of the previous ping are contaminating the current ping.
For instructions on how to adjust this setting, refer to the RESON Sonar UI User Manual (see
Appendix E Reference Documentation).

6.2.4 Receiver Gain

The Gain setting adjusts the amount of receiver gain applied to the returned signal. Typically set
between 20dB and 40dB.
The Gain adjusts itself automatically when Tracker is selected (see also section 6.3.2 below).
The SeaBat system utilizes Time-Varied Gain (TVG) which counteracts the diminishing echo
strength of signals that originate from farther away. The TVG data contains the applied gain at
each range (sample) and is available in record 7010. Refer to the Data Format Definition document
for information (see Appendix E Reference Documentation).
The generation of the TVG curve is based on the formula in Table 4.
SeaBat T-Series Subsea Operator's Manual
Version 7
o Less power may be required at shorter ranges. Start with 200dB at minimum
Range, and increase with Range.
NOTE
NOTE
Page 32 January 31, 2019