Blonder tongue MIDM-806C User manual

INSTRUCTION MANUAL
One Jake Brown Road
Old Bridge, NJ 08857-1000 USA
(800) 523- 049 • (732) 79-4000 • FAX: [phone]
www.blondertongue.com
©2004 Blonder Tongue Laboratories, Inc. All rights reserved. Specifications are subject to change without notice. Trademarks are the property of their respective owner.
MIDM-806C
Demodulator
Stock No. 7740C
51191400C
De cription
The MIDM-80 C is a professional quality single channel, agile audio/video demodulator. It provides an A/V output from
any VHF, UHF or CATV channel (54-80 MHz) and is designed for use in the Blonder Tongue Modular Headend System.
The MIDM-80 C demodulator and the MICM/AMCM modulator can be paired to perform off-air channel processing or to
cherry pick cable channels.
RF
Input Frequency Range:
54 - 80 MHz (Broadcast Ch’s. 2- 9, Cable
Ch’s 2-125) VHF, UHF, CATV (STD, IRC, HRC)
Input Level Range:
Antenna Mode: -5 to +30 dBmV
CATV Mode: +2 to +12 dBmV with 70 Channel Input
Input Impedance: 75 Ohm
Video
Video Output Level: 1 Vpp Adj.
Video Output Impedance: 75 Ohm
Video S/N Ratio 4 MHz BW:
>=44 dB (CATV Mode, 70 Ch. Input 2-12 dBmV, Measured
Channel -3 dB)
Video Response 0.2 to 4 MHz: ± 2 dB Relative to 0.2 MHz
Differential Gain: 5% Typical
Differential Phase: 5 Deg. Typical
Chrominance to Luminance Delay: -40 ns Typical
Chrominance to Luminance Gain: 90% Typical
K Factor: <= 5%
Short Time Distortion: <= 5%
Audio
Audio Output Level: 1 Vpp Adj.
Audio Impedance: 00 Ohm Unbalanced
Electrical
Power Requirements
12 VDC: 140 mA
5 VDC: 150 mA
2.5 Watts
Mechanical
Dimensions: 1.15 x 3.5 x 7.5 in.
Weight: 13.5 oz.
Temperature Range: 0° to 50° C
Connector (Rear)
RF Input: “F” Type Female
Video Output: “F” Type Female
Audio Output: RCA Phono Female
Power: Locking Header 3 Pin
Control (Front)
Channel Selection: UP/DOWN Push Button
Power Lock: Push Button
C/ANT Mode: Push Button
Video Level: Control
Audio Level: Control
Indicator
Channel/Mode: 2 Digit, 7 Segment RED LED Display
+ 100 Channel: RED LED
Specification

One Jake Brown Road
Old Bridge, NJ 08857-1000 USA
(800) 523- 049 • (732) 79-4000 • FAX: [phone]
www.blondertongue.com
Operating Control & Indicator
Front Panel
All operating controls are located on, or are accessible from the front panel.
MIDM-806C
Stock No. 7740C
BLONDER
TONGUE
VA
PWR C/ANT
CH CH
LOCK +100
6
9
7
8
54
12
3
Indicator lights
when in Standby
Channel
Display
Lock
Indicato
r
1. Video - Adjusts video output level
2. Audio - Adjusts audio output level
3. Channel LED - Displays ANT or CATV
channel
4. C/ANT Mode Button - Press button to enter
the mode selection menu. Use the channel
UP/DOWN buttons to select the type of
channel system required as follows:
Press C/ANT button again when selection
is completed.
5. Power - ON/OFF push button
. Channel DOWN - Increments channel by -1
7. Channel UP - Increments channel by +1
8. +100 LED - When depressed, RED LED lights to
indicate channels 100 and higher.
9. Lock - Depressing lock button locks present channel or
mode in memory preventing inadvertent change. A user
must depress the lock channel button again for any
channel/mode changes.
Rear Panel
All the connectors are located the rear panel.
1
3
4
2
1. Video Output - Standard negative sync video at a 0.5 to 1.5 Vp-p level.
2. Audio Output - Adjustable 0.5 to 1.5 Vp-p
3. Power - The polarized power connector accepts +12 VDC, +5 VDC and ground
4. ANT/CATV - RF input from antenna or CATV drop
Operating Procedure
Connect the power input connector to the power supply. A LED bar lights to indicate the unit is in standby.
Connect the video/audio connectors and the RF input to the system.
Press PWR. The LED display will show the number of the latest channel selected.
Press C/ANT to enter the mode selection menu. Use the channel UP/DOWN button to select the type of channel system
required. Press C/ANT again when selection is completed.
Use CH CH to select the channel required.
A channel number higher than CH 99 is represented by the +100 indicator and the number shown on the LED display.
The +100 indicator represents the one hundred digit of the channel number.
Example: CH120 is displayed as 20 and the +100 indicator.
Adjust for proper video output level by tuning the video potentiometer.
Adjust for proper audio output level by tuning the audio potentiometer.
Press LOCK to lock-in the panel controls to prevent inadvertent channel or mode changes.
The LOCK indicator is lit when unit is in the LOCK mode.
Display Channel System
5 STD (CATV)
H HRC (CATV)
I IRC (CATV)
U Broadcast (ATV)
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