ChannelPlus 5425/5435/5445 — Multi-Room Video Modulator Manual

Installation and programming manual for the ChannelPlus 5400 Series frequency-agile multi-channel video modulators — Models 5425 (2-channel), 5435 (3-channel), and 5445 (4-channel).

Overview

The ChannelPlus 5400 Series are digitally-tuned video modulators that convert any baseband video and audio signal to a user-selected UHF or Ultraband CATV channel. An internal quartz crystal reference oscillator and PLL circuitry ensure drift-free performance. Any TV connected to the output via coax can receive the signals when tuned to the proper channel.

• 5425 — 2 channel modulator
• 5435 — 3 channel modulator (built-in loop-through connectors on channel "A")
• 5445 — 4 channel modulator

Controls and Connections

• Select button — chooses which modulator (A/B/C/D) to program
• Program button — enters the desired channel number for the selected modulator
• Modulator LEDs — show which modulator is currently selected
• Video/Audio inputs — one Video, one Audio Left, one Audio Right input per channel; left and right audio inputs combine for monaural output
• Terminating jumpers — remove for Hi-Z; remove the "LOOP" jumper to feed a local monitor via RCA "Y" adaptors
• Power supply — 15VDC, 300mA (5425 & 5435) or 600mA (5445 only)

Programming

Valid Channels

• 14–64: UHF channels
• 65–125: CATV channels
• 95–99: not valid channel numbers (reserved for HRC/IRC setting)

Channel Spacing

Skip at least one number between channels — e.g. channels 14 and 16 are OK, but 14 and 15 is illegal. If two adjacent channels are selected, the unit accepts the entry but blinks the LEDs of the channels that are too close; re-program one of them to move it away.

To Program a Modulator to a Channel

1. Press the select button until the LED for the desired modulator (A, B, C, or D) is on.
2. Press the program button the number of times matching the first digit(s) of the desired channel, waiting for the modulator's LED to light again between digits ("ready for next number").
3. Continue entering remaining digits. To enter a "zero", press program 10 times.
4. Example: to set modulator B to channel 67 — select B, press program 6 times, wait, then press program 7 more times.
5. Example: to set modulator C to channel 120 — select C, press program 1 time, wait, press program 2 more times, wait, press program 10 more times (for the zero).

Channel Readback

A readback mode displays the current channel assignment for any modulator: select the modulator, then hold the program button down for 5 seconds and release. The LED blinks out the channel digits — e.g. a channel programmed to 108 blinks 1 time (pause), 10 times ("10" is read back as 0), pause, 8 times.

Changing Modulation Standards (HRC / IRC)

Most cable services use IRC frequency assignments — this is the default. If the cable service uses HRC, or the TV appears to search for "house channels," reprogram the modulator to HRC by entering "98" on any channel; set back to IRC by entering "99". This setting affects all channel assignments for that unit — cable channels must be all IRC or all HRC, not mixed.

Error Indication

If an error occurs or an incorrect channel is entered, the LED flashes quickly for a second and returns to the previous setting.

Troubleshooting

Specifications (typical @ 25°C ± 5°C)

Warranty

Multiplex Technology, Inc. (MTI) warrants this product to be free from defects in materials and workmanship for one year from the date of purchase. MTI will repair or, at its option, replace the defective product. To obtain warranty service, call MTI for a Return Material Authorization (RMA) number and return the product prepaid to Multiplex Technology, Inc., 3001 Enterprise Street, Brea, CA 92821, Attention: Customer Service, with the RMA number on the outside of the carton.

This device complies with FCC Part 15 Rules for TV interface devices. Any change or modification without permission of Multiplex Technology, Inc. may void the user's authority to operate this equipment.