Tvm Top Inside View - Standard Communications TVM Series Owner's Manual

41. CONT (Control) – Screw terminal. When grounded, switches from the left
and right audio inputs to the monaural audio input.
42. 4.5 MHz OUT – 75-ohm F connector. Not used.
43. VIDEO OUT – 75-ohm F connector. Not used.
44. VIDEO IN – 75-ohm F connector. Video input connection.
Internal (All Units)
Refer to Figure 3-2 for the location of the PROM/ROM switch:
45. PROM/ROM – Slide switch. Selects either the FCC-assigned standard fre-
quency format or a format stored in the optional FX450 PROM. Power to the
equipment needs to be disconnected and reconnected to activate the PROM
after installation.
TVM550IIS with DSG2000 Digital Stereo Module
See Figure 3-3 for locations of items described in this section.
DSG2000 Front Panel
1. L LEVEL – Potentiometer. Adjusts level for the left audio channel, which is
indicated on the seven-string LED LEFT AUDIO meter (3).
2. RIGHT AUDIO – Seven-string LED meter. Indicates the modulation level of
the right audio channel. The first five LEDs are green, and the last two are
red. The first red LED indicates 100% modulation (0 dB), and the last indi-
cates overmodulation (+3.0 dB).
TVM450/S/TVM550/S/TVM550II/TVM550IIS
FRONT
SU02
45
PU00
REAR
Figure 3-2. TVM Top Inside View
Owner's Manual
Controls and Connections
POWER
ROM
JU04
TRANSFORMER
PROM
PM00
9002
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