Sierra

MSDG Display mode

F-4E-48-MC With MSDG first fly was in 1972 and F-4E-60-MC with DSCG first fly was in 1974. In 1975 both of them were in service, MSDGs had some problem so they changed to DSCG quickly.

If we don't count on what they upgraded (Only US Air Force F-4E's because export versions have another story) F-4E 31_45 Blocks was DVST : 66-284 thru 69-7589 ( F-4E 46&47 only made for IRAN) F-4E 48-59 Blocks was MSDG : 71-237 thru 73-01204 F-4E 60-63 Blocks was DSCG : 74-00643 and up Later They upgraded some DVST & MSDG to DSCG

DSCG

MSDG

DVST

We had a few types of APQ-120 radars on the Phantom. The first series was the APQ-120D, which were completely analog and this F-4E's did not carry a television-guided weapon like the Maverick, and they did not have TISEO. They are called DVST or Direct View Storage Tube. Since the display was analog, it only showed the radar images directly to the pilots without any changes and did not have the ability to draw any numbers on the screens. The second series was the APQ-120E. An analog-to-digital adapter was installed on these so the analog radar images could be displayed on a digital display. In this way, the display was digital, so also show images of television-guided weapons and TISEO. These Phantoms are called MSDG or Multiple Sensor Display Group. despite the radar images, the display of this version had a new mode called TV, which showed images of the television-guided weapons and TIESO. The last one was the APQ-120F. This series was called DSCG or Digital Scan Converter Group In this series, a series of parts and computers were digitized, so the radar display changed to show digital information and was no longer analog in this series This series of Phantoms found the ability to carry television-guided weapons and various optical pods, unlike the first series It could also draw numbers and various writings It also showed images of television-guided weapon and TISEO.