Rear Panel Connections 5
RF OUTPUT
MADE IN TAIWAN
IF IN
IF OUT
VIDEO INPUT
AUDIO INPUT
4.5 MHz INPUT
120V AC
60 Hz 618W
600W MAX
R1 - RF OUTPUT
This is the modulator output.
R2 - IF IN Connector
This is the composite IF input to the up converter circuits.
The composite IF has both the aural and visual IF
combined. This connection is normally cabled directly
from the “COMPOSITE IF OUT” connector (See R3). This
external IF loop allows the use of accessories such as
scramblers or alternate video sources.
R3 - IF OUT Connector
This is the composite IF output from the IF circuits. The
composite IF provides a vestigial sideband filtered visual
carrier at 45.75 MHz combined with a level controlled
(-15 dBc typical) aural carrier at 41.25 MHz. This connec-
tion is normally cabled directly to the “COMPOSITE IF IN”
connector (See R2). The video carrier output level is
+40 dBmV.
R4 - VIDEO INPUT Connector
This is the baseband video input to the IF circuits. This
input accepts baseband through 4.2 MHz video at levels
from 0.7 Vp-p to 1.5 Vp-p.
R5 - AUDIO INPUT Connector
This is an unbalanced audio input to the IF circuits. This
“RCA” (phono) connector input accepts 40 Hz through
15 kHz audio at a nominal level of 250 mV RMS
(approximately -10 dBu). Input impedance is 10K Ohms.
R6 - 4.5 MHz INPUT
To use this input, remove the top cover of the modulator
and move jumper J2 to the ON position. Input 4.5 MHz at
R6 at a level of +37 dBmV.
R7 - 600 W Convenience Outlet
This outlet is unfused and must be limited to a 5A or 600
W load at 120 VAC.
R8 - LINE CORD
Connect the 3 wire IEC line cord to this connector.
Connect to a nominal 115 VAC ±10%, 60 Hz source. Do
not defeat the safety purpose of the ground pin on the line
cord plug.
R9 - FUSE
To access the fuse, unplug line cord from the socket R8.
Pull out on the tab on the upper side of the fuse
holder assembly.
R1 R2 R3 R4 R5 R6 R7 R8
FIGURE 2
R9
