Cable-Tronix CTADM-806a User manual

INSTALLATION MANUAL
CTADM-806a
Rack Mount Agile Audio/Video Demodulator
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PACKAGE CONTENTS
This package contains:
One CTADM-806a Rack Mount Agile Audio/Video Demodulator
One CTADM-806a installation manual
PRODUCT DESCRIPTION
The CTADM-806a is a professional grade agile audio/video demodulator for demodulating NTSC
channels from 54 MHz to 806 MHz to baseband audio and video. IRC and HRC offsets can be
activated. Key features include: IF output for monitoring the status of the tuner and interface with
up converters, a composite multiplex output for stereo applications, SAW filtering for excellent
vestigial sideband response, keyed AGC for picture stability, exceptional differential gain and and
phase, and quadrature single tuned audio detection. The CTADM-806a is rack mountable in a
standard EIA 19” rack.
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SPECIFICATIONS
CTADM-806a
Rack Mount Agile Audio/Video Demodulator Specifications (Typical)
RF
1. Bandwidth 54 – 806 MHz
2. Channels VHF 2 -13, UHF 14 – 69
CATV 2 – 125 HRC/IRC offsets
3. Input Level Single channel, +40 dBmV maximum
60 channels, +20dBmV maximum
4. Image rejection @ -47dbm input VHF=70dB, UHF=60dB
@ -17dbm input VHF=60dB, UHF=50dB
5. Noise figure VHF= 8dB, UHF=8dB
VIDEO
1. Video Output Level 0.5 to 1 Vp-p
2. Video Impedance 75 Ohms
3. Differential Gain <5% max. @ 10 to 90% APL
4. Differential Phase <5° max. @ 10 to 90% APL
5. Bandwidth DC to 4.2 MHz
6. Frequency Response +/- 1.5dB
7. Detector Type Envelope
AUDIO
1. Output Level 800 mV (minimum) de-emphasized
2. Output Impedance 600 ohms
3. Frequency Response 20 Hz to 15 KHz
4. Detection Type Quadrature FM
5. MPX Output Level 800mV unbalanced @600 ohms
GENERAL
1. Power Input 105 – 130VAC, 60 Hz
2. Operating Temperature 32 ˚F ~ 122 ˚F
3. Connectors RF In, Video Out, IF Out: “F” Type
MPX Out, Audio Out: RCA Type
MECHANICAL
1. Dimensions 19”(W)” x 1.75 (H) x 3” (D)
2. Weight 4.16 Lbs.
INSTALLATION AND OPERATION
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NOTE TO SYSTEM INSTALLER
System installer must adhere to Article 820-40 of the NEC that
provides guidelines for proper grounding and specifies that the
cable ground shall be connected to the grounding system of the
building, as close to the point of cable entry as practical.

1. UNPACKING and HANDLING
Each unit is shipped assembled and factory tested.
Ensure that all accessories are removed from the container before discarding packing material
2. MECHANICAL INSPECTION
Inspect the front and rear of the equipment for shipping damage. Make sure the equipment is
clean, and no connectors are broken, damaged, or loose. If equipment appears to be damaged
or defective please contact your distributor or Cabletronix at 1-610-429-1511 for assistance.
3. PRODUCT DIAGRAM
FRONT and REAR PANELS
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1 Power on LED Power on when lit
2 Channel Number Display Indicates demodulated channel
3 Mode LEDs Indicates operative mode: TV, Standard CATV, CAT/IRC, or
CATV/HRC
4 Mode Selector Switch To select operative mode
5 Channel Up and Down Switches To select upper or lower channels
6 RF In RF input signal from antenna or cable line
7 Video Out Baseband video signal connected to the video input of a
modulator or TV monitor
8 I.F, Out (45.75 MHz) Sample I.F. output to monitor the tuner and for use with up
converters
9 4.5 MHz Output Audio output for stereo applications using a BTSC stereo
generator
10 MPX Out Non-de-emphasized audio signal as alternate connection for
stereo. Before connecting to the audio input of a modulator, the
pre-emphasis filter on the modulator must be disabled
11 Audio Output De-emphasized baseband audio signal
12 Convenience Outlet 600 watts of AC power for interconnecting other equipment
13 Power Cord Three prong type power plug connects to 120 VAC, 60 Hz outlet
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4. HARDWARE CONNECTIONS
a. The CTADM-806a is designed for installation in a 19” EIA rack
b. Connect a 75 ohm coaxial cable with “F” connectors fromthe CTADM-806a’s RF Input
port to the Off-Air antenna or other source.
c. Connect a 75 ohm coaxial cable with “F” connectors from the CTADM-806a’s Audio
Output port to the modulator’s Audio Input.
d. Connect a 75 ohm coaxial cable with “F” connectors from the CTADM-806a’s Video
Output port to the modulator’s Video Input.
e. Connect the CTADM-806a to an appropriate power source capable of powering this
device. Be certain that power source is capable of handling the load if the
CTADM-806a and other equipment are being powered by it.
5. CHANNEL SELECTION
a. The CTADM-806a can demodulate audio and video signals from any CATV channel
from 2 to 125 or any Off-Air channel from 2 to 69 in the 54 MHz to 806 MHz frequency
range. For example, assume Off-Air channel 8 needs to be demodulated and
reassigned to CATV channel 35. In this example the CTADM-806a would be set to
channel 8.
b. Using the Mode Selector Button set the mode to Standard CATV unless the source
is HRC, IRC, or TV
c. Push the Channel Up/Down Button to select appropriate channel to be demodulated.
d. Go to the modulator.
e. Set the modulator to CATV mode.
f. Set the channel on the modulator to the appropriate channel. Using the above
example, the modulator channel is set to channel 35.
6. RF, AUDIO and VIDEO LEVEL SETTINGS
a. RF input level should be 8 dB for optimum performance.
b. Audio level setting from the CTADM-806a should be 0 dB. Adjust as necessary.
c. Video level setting from the CTADM-806a should be 140 IRE or 1 V Peak-to-Peak.
Adjust as necessary.
d. If the CTADM-806a audio and video levels are in spec, but audio volume and video
brightness need adjustment then those adjustments should be made at the modulator,
not the CTADM-806a.
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7. TROUBLESHOOTING
a. Ensure you are using quality multiple shielded cables with quality radial or
compression F-connectors. It is recommended Belden 9167 cable be used to prevent
signal ingress or egress.
b. Ensure the F-connector’s center conductor is making solid contact with the
CTADM-806a’s RF Input, Audio Output, and Video Output ports.
c. Make sure the appropriate mode is selected using the Mode Selector Button.
d. If the CTADM-806a is not receiving power make sure the power cord is firmly
connected to the power source/outlet. Be sure the power source is properly rated to
handle the CTADM-806a load especially if other equipment is being powered by that
same source.
e. Further troubleshooting assistance can be found on-line at www.cabletronix.com in
addition to support from Cabletronix sales engineers at 1-610-429-1511.
This is a notice to inform you that content passing thru this device may contain strong
language or depictions of violence, sex or substance abuse. This unit contains no
parental control features. Parental discretion is advised.
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