Olympus EPOCH 650 - Pulser and Receiver Settings; Sensitivity; Reference Gain

DMTA-10055-01EN, Rev. A, February 2015
Software Overview 55
3.9 Pulser and Receiver Settings
The EPOCH 650 allows access to most of its pulser and receiver settings through the
Pulser and the Rcvr menus. System sensitivity (gain) and reference gain are
controlled exclusively using the direct-access keys.
3.9.1 Sensitivity
The system sensitivity (gain) is adjusted using the dB direct-access key.
To adjust the system sensitivity
1. Press dB.
2. Adjust the value:
Use the navigation pad arrow keys or rotate the adjustment knob in either
coarse or fine increments
OR
Press one of the parameter keys to choose the corresponding preset value
You can automatically adjust gain using the AUTO XX% feature. See “Escape Key” on
page 53.
3.9.2 Reference Gain
You can define a reference gain by pressing 2
ND
F, (REF dB). This sets the current gain
as the reference gain and activates a scanning gain for further adjustments (see
Figure 3-8 on page 56).
When the reference gain is set, the parameter keys allow access to the following
functions:
• Add: Combines current scanning gain with current reference gain and sets the
resultant as the new reference gain.
• Scan dB: Toggles between current scanning gain and 0.0 dB scanning gain.
• Off: Turns off reference gain feature (scanning gain is lost).
• +6 dB: Increases the scanning gain by 6 dB.
• −6 dB: Decreases the scanning gain by 6 dB.