Monroe Electronics R176 User Manual

Model R-176 Vertical Interval Switch

Installation

Connect the COM outputs on the
R176 to the video and audio inputs
on your modulator.

Connect your primary audio/video
signal sources to the PRI Inputs on
the R176.

Connect your secondary audio/
video signal sources to the SEC
inputs on the R176.

Screw the wires from the supplied
power pack to the two connector
power input on the rear of the unit.

A TTL level control signal or a
dry contact across GND and Set
on the EXT CTRL connector will
change the output from the primary
to the secondary, if a baseband
video signal of at least 0 dB is
present.

The unit will also switch if the ON
command DTMF (Cue Tone) code
is input to the DTMF and GND
inputs, and the baseband signal is
present. It will switch back to the
primary on receiving the DTMF
(Cue Tone) OFF command.

Programming

To program the Cue Tone de­coder, connect a Touch Tone
telephone to DTMF and GND
inputs. With the power off, remove
the cover from the unit. On the pc
board install the jumper across
JP101. Re-apply power.

Press and hold the # button on the
telephone until the relays pulse on
and off (click) once.

Press and hold down the * button
until the relays pulse on and off
(click) 3 times.

Enter the number of digits to be
used for the On/Off code. You
may use from 1 to 4 digits.

The unit will click once if the entry
is valid.

If the entry is not valid the unit will
click 5 times and exit programming
mode. Start over.

If the entry was valid, enter the On
Code. The unit will click three
times once the selected number of
digits has been entered.

Enter the digits for the Off Code.
The unit will click three times once
the selected number of digits has
been entered.

Please Note:

The On and Off codes must be
different. If programmed the same
the relay will always be turned on
when the code is entered.

Codes must be entered within 3
seconds, or the unit will click 5
times and exit programming mode.

If, at any time during
programming the relays click 5
times, an error has occurred.
Return to the start of the
programming procedure and
reprogram the unit.

Programming is complete.

Program Test

Test the system by entering the
cue tones for the ON command on
the telephone keypad. Verify that
the red light on the front panel
goes on. Next enter the cue tones
for the OFF command, and verify
the led turns off.

If the switches work correctly,
remove power from the unit. Next
remove the jumper from the two
pins on JP101, re-install it on only
1 pin. Replace the cover and re­apply power. Disconnect the
telephone, and connect the audio
outputs from your source of cue
tones to the DTMF and GND
terminals.

**Remember, that the audio relays
work in the absence of audio or
video signals, but the video

switch WILL NOT WORK if there
is no input of video to the
primary (or normally closed) video

input.**

Relay Control Connection

Connect the normally open (NO)
contact to Set.

Connect the relay common (COM)
contact to GND.

Open Collector Control

Connect your transistor’s collector
to Set and the transistor’s emitter
to GND.

Operation

The R176’s primary PRI inputs
are normally connected to the
common COM outputs. It
remains in this state until the Set
input is connected to GND, or the
DTMF (Cue Tone) ON command is
received, and a baseband video
signal of at least 0 dB is present.

The unit will switch during the
vertical blanking interval of the
video signal. This connects the
secondary input to common until
Set is not connected to GND, or
until the DTMF (Cue Tone) OFF
command is received.

Specifications

(firmware 80177-3.00)

DTMF Input Levels

-20 to +3 dB

Video

75 ohms ; ‘BNC’ connectors

Audio

Balanced stereo; screw terminals;
>90 dB isolation

Isolation

@ 5 MHz > 80 dB

Control Input

1 mA maximum to GND.

Power Requirement

117VAC ±10%, 60 Hz.
Power pack output; 13.6 VAC

Physical

1.75"H x 19"W x 4"D
Weight 2 lbs.

Design and specifications are subject to change
without notice.

Warranty

Monroe Electronics, Inc. warrants to the owners, each instrument and sub­assembly manufactured by them to be free from defects in material and
workmanship for a period of one year after shipment from factory. This
warranty is applicable to the original purchaser only.
Liability under this warranty is limited to service, adjustment or replacement
of defective parts (other than fuses or batteries) on any instrument or sub­assembly returned to the factory for this purpose, transportation charges
prepaid.
This warranty does not apply to instruments or sub-assemblies subjected to
abuse, abnormal operating conditions, or unauthorized repair or modification.
Since Monroe Electronics, Inc. has no control over conditions of use; no
warranty is made, or implied as to the suitability of our product for the
customer's intended use.
THE WARRANTY SET FORTH IN THIS ARTICLE IS EXCLUSIVE AND IN
LIEU OF ALL OTHER WARRANTIES AND REPRESENTATIONS,
EXPRESSED, IMPLIED OR STATUTORY INCLUDING, BUT NOT LIMITED
TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
Except for obligations expressly undertaken by Monroe Electronics, in this
warranty, Owner hereby waives and releases all rights, claims and remedies
with respect to any and all warranties, express, implied or statutory (including
without limitation, the implied warranties of merchantability and fitness), and
including but without being limited to any obligation of Monroe Electronics with
respect to incidental or consequential damages, or damages for loss of use.
No agreement or understanding varying or extending the warranty will be
binding upon Monroe Electronics unless in writing signed by a duly authorized
representative of Monroe Electronics.
In the event of a breach of the foregoing warranty, the liability of Monroe
Electronics shall be limited to repairing or replacing the non-conforming goods
and/or defective work, and in accordance with the foregoing; Monroe
Electronics shall not be liable for any other damages, either direct or
consequential.

Return Policy

Materials returned to Monroe must have a Return Material Authorization
number. To obtain a RMA number, contact our A/V Switching & Control
Customer Service at 585-765-2254 or fax [phone]. Customers have 30
days to determine that the product ordered fills their need and performs as
described in Monroe’s literature. Units returned for approved repair or credit,
must be in the original packaging including all parts and paperwork plus be in
very good physical condition. If not, the customer is billed the cost to refurbish
the unit and for missing accessories and merchandise. No products may be
returned for exchange or credit after 12 months of the shipment date. Monroe
reserves the right to repair or replace units under warranty.

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