Monroe Electronics 628 User Manual

Model 628 encoder sensor instruction sheet

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Design and specifications are

subject to change without notice

628/100 101206
P/N 1340148

Model 628 Encoder Sensor Instruction Sheet

Installation

1.The Sense Input signal must
be a 1 Vp-p scrambled video sig-
nal. Connect the Encoder ’s
scrambled video output to the
628’s Sense Input.

2. Connect your barker channel
to the Primary Input. This is
normally an IF signal.

3. Connect your Encoder’s IF
ouput to the 628’s secondary
Input.

4. Connect the Common output
of the 628 to your modulator’s
input.

5. Plug the power supply
provided into the 12VDC input
on the unit

Specifications

RF Isolation
> 60 dB @ 450 Mhz

Sense Input Level
1 V p-p Video ± 10 %
Levels below approximately 0.8
V p~p should cause secondary
to connect to the output.

Power Requirement

100-240VAC

±

2%, 50/60 Hz.

Power pack output; +12 VDC

Physical
5.25” H X 2.75” W X 2” D
1 lb.

Operation

The 628’s sensing circuit moni-
tors the loss of scrambled video.
The absence of the scrambled
video causes the 628 to auto-
matically switch to the primary
input. It will remain in this state
until the scrambled video returns
to the sense input causing the
628 to switch back to the sec-
ondary input.

Normal IF In

IF Out

Scrambled IF In

Directional

Coupler

Scrambled

Video

IF In

Video Out

Demodulator

Attenuator

(Pad)

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