Comtech EF Data KST-2000A/B - Manual (Page 76)

Ku-Band Satellite Transceiver Revision 9
Operation MN/KST2000AB.IOM
3–28
3.11 Automatic Gain Control (AGC)
Note: AGC function only available with SSPAs of
≤ 25W.
The KST-2000A/B incorporates a closed-loop Automatic Gain Control (AGC) function
that maintains the system gain, as measured from the TX IF input to the Ku-Band output
of the Comtech EF Data supplied SSPA, at the user’s preset value despite the effects of
aging, operating temperature, or cabling loss. This is not a Automatic Level Control
(ALC) function, but a true AGC that maintains the gain of the system constant independ-
ent of input and output absolute levels. This is important to multicarrier operation, when
individual carriers turn On/Off and the level of the remaining carriers must remain unaf-
fected. This function is designed to operate with only Comtech EF Data SSPAs that in-
corporate a calibrated output detector. The transceiver can be set to operate in either the
AGC, non-AGC, or MANUAL gain mode.