2.5.4 Gain and Offset Changes
The nominal gain through each channel is adjustable from -10.0 dB to -70.0 dB. Each channel has an offset
value that allows you to add external attenuation that will automatically be reflected in the gain value displayed
for that channel. The offset value is adjustable from 0 to 60 in 1 dB steps.
T
he gain and offset changes will be made as you make them but if you do not wish to save the
changes you have made, scroll to
“R”
and push the menu/Execute switch and select
“NO”
in the
“SAVE
SETTINGS?”
window or
do not press the Menu/Execute switch
; simply do nothing for approximately 30
seconds, and the system will return to the normal operating mode.
To change the GAIN or OFFSET, first push the Menu/Execute switch to get to the desired channel’s gain/offset
menu setting:
Operate the Menu/Execute switch until you get to the menu item you want to change (see Figure 2.5 for
the sequence of menu options). The following display is for changing the gain and offset for channel 1:
CH1 GAIN=-33.0
CH1 20 R
NOTE: CHANGES TAKE PLACE ON GAIN AND OFFSET IMMEDIATELY BUT DO NOT GET
SAVED UNTIL YOU GO TO THE SAVE MENU AND INDICATE YOU WANT TO SAVE THE
CHANGES.
Press the Up/Down switch to change the gain in 0.5 dB steps. Use the left/right switch to navigate from
gain to offset. Press the Up/Down switch to adjust the external attenuation offset value. The gain value
will be adjusted to reflect the new offset value at the time that the changes are made.
NOTE: THE GAIN AND OFFSET WILL BE CHANGED AS YOU ADJUST THE NUMBERS.
HOWEVER, THE VALUE WILL NOT BE STORED UNTIL YOU INDICATE YES IN THE SAVE
SETTINGS WINDOW.
When the display indicates the value desired you can push the Menu/Execute switch to the next item
OR you can scroll to “R”, push the Menu/Execute switch to get to:
SAVE SETTINGS? Y N
Selecting
Y
will save the new settings. Selecting
N
will revert to the previous settings.
Pushing the Menu/Execute switch then takes you to:
G1=-33.0 G2=-41.0
G3=-17.0 G4=-52.0
Figure 2.5 gives the menu items and how to make changes
1586-04-0431 Manual
Page 15
4/12/21
