TV mode means that the target was passively acquired by TOV and the missiles were launched with only illumination radar-transmitter turned on during the missile flight, and the target was tracked manually by the TOV control stick. No monopulse guidance radar transmitter emittion at all....while TAR was not even pulled up entirely.
Combined mode means that the target was passively acquired by TOV, but the guidance monopulse radar transmitter was turned on for a very short time to determine the distance to the target. Then it was turned of, and missile was launched with only illumination radar transmitter turned on during the missile flight, and the target was tracked manually as in TV mode...


So, in TV mode, acquiring the target is done passively by using the TOV and the Control stick in the SURN cabine. When the target is acquired with the TOV, command "Mode II" (РЕЖИМ II) is turned on and the command "ЗАХВАТ У ВАЗДУХУ" (missile will acquire the target AFTER the launch) is formed in SPL-s (self propelled launcher) AKR (analogue command calculator) and transfered to the missile.
In the missile`s seeker a command "ЗАБРАНА ЗАХВАТА" (lock on ban - no lock on, on the launcher). In the SPL- launching block, the command for "blocking the launch" (which would normally be active) is disabled. That enables the launching of the missile, but only after the missile seeker signal, and not from the signal form launching block of the SPL, because the missile is reporting to the launching block that it acquired the target and that it is automaticaly tracking it.
From SPL, a command is sent to guidance and tracking radar SURN "ГОТОВОСТ" (Readiness for launch), no matter that the missile seeker did not acquire the target.
Then the missile is launched, illumination transmitter is on and it is illuminating the target and tail antena of the missile. Target is tracked with TOV by using the Control stick. The signals from CW illumination transmitter is reflected of the target and received in the GSN of the missile thus forming the commands for semi active radar self-guidance. The missile seeker will begin acquiring the target 4,5 seconds after it is launched by removing the command "ЗАБРАНА ЗАХВАТА" (lock on ban - no lock on, on the launcher). The difference in the reference signal received by the missile tail antenna, and then reflected of the target and received by the GSN, also measures the target speed and the speed of convergence.

This metod is usually used against low flying aircraft and the tactics include launching of several missiles.
But, we used it against aircraft flying at all altitudes and the illumination radar was usually turned on 2-3 seconds AFTER the missile launch to make the radiation time as short as possible.

In Combined mode, since the monopulse target tracking radar transmitter was turned on and determined the range of the target, the missile has acquired the target on the SPL (launcher). Then it is launched after the launching block of the SPL sent to SURN the command "READINESS", after receiving the information from the missile seeker that is is tracking the target.
Then, when the missile is launched, SURN operators turn monopulse target tracking radar of by using the switch "EKV" (equivalent) and continue to track the target by TOV. Illumination radar is turned on all of this time.....

So in Combined mode we have monopulse target tracking radar transmitter turned on for a few seconds and longer time of CW illuminator transmitter being turned on then in TV mode....

I hope I have explained this well in English language.....