Contents
- 1. MX30V Manual
- 2. P379 Manual
P379 Manual
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| Mirror Download [FCC.gov] | |
| Document ID | 322126 |
| Application ID | N36Zxj4EYI+5YsQ+7/O4RQ== |
| Document Description | P379 Manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 171.12kB (2138950 bits) |
| Date Submitted | 2003-04-30 00:00:00 |
| Date Available | 2003-06-12 00:00:00 |
| Creation Date | 2002-02-18 15:23:36 |
| Producing Software | Acrobat 5.0 Image Conversion Plug-in for Windows |
| Document Lastmod | 2002-02-18 15:26:15 |
| Document Title | P379 Manual |
| Document Creator | Acrobat 5.0 Image Conversion Plug-in for Windows |
fCADCO
SYSTEMS, INC.
BROADBAND EQUIPMENT
Operating Manual
for
P-3 79
System MW
2363 Merritt Drive ' Garland, Texas 75041
Phone 972-271-3651 ° Fax 972-271-3654 ' BOO~877-2288
Table of Contents
Table of Contents
Important Notices
HRC Output Frequency Set
Operating Instructions
Important Notices
Shipping Loss or Dnnnge
Before signing the Common Carrier’s delivery meipt. count the number of cartons and inspect aah for
vistbledamage. lfthe numberofenrtorsdosnct agreewiththemeiptorthereisdamage, make noteof
these discrepancies on all copies of the receipt before sipiing.
Immediately unpack the equipment and inspct for ooneenled damage. Ifdamage is found. notify the
carrier immediately. We suggen you keep the shiming anon and pnchg'ng material should the
equipment ever need in be returned.
Afier filing your claim notify CADCO for assistance on repair or rqilaeement disposition.
CAUTION — Unauthorized Repair
Unauthcrized repair, modifitmion or disassembly during the warranty period may uneel the warranty.
should field repairs or modifltztions be desired. CADCO technicians may be able to prvvtfi helpful
suggeaions. saving you both time and money.
Notice af Proprietary Data and Change!
Data drawing, designs represented and all other material contained herein are the prvprietary prnperty of
CADCOSystems, inc, andmaynothereprodtwedordnpliatedinanyfomwithmnwritten
authorization by CADCO Systems. Inc. All material is subject to change without notice or obligation
Equipment Return
Should you desire to return the equipment for service. please all CADCO prior to shipping. Enclosing as
much information as posibleonthe mean for naurnandthewotkderiredwill expedite servioeandhelp
irsure your satisfaction. lfpnsrible pndtthe equipment in the original anon and materials. Ifthe
originalpaeldngisnnlongeravailable. packtheequipmentinatshieningmamialsrfin‘enttnprwkka
minmumnfljinehfisepnntionbetweenthemrtonandeqnipmem. NoRemrnAnthmintionnumber
isrequired. Mudeynmrennnmwlephonenumberandmethodofreumnofshipment Shipthe
equipmentprepidtothenddrusinthismanual.
Benson: for using CADCO Fan-wry Service
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Suggestions for Headend Racking and Maintenance
For prolonged equipment life and operating stability, the following recommendations are
made:
- All headends should be installed in an environmentally controlled dust-free room
having a nominal temperature of 80° F (26° C) and 60% humidity The room should
be protected from rodents and insect pests.
- All equipment should be mounted in standard equipment racks or cabinets.
- All equipment should be rack spaced one panel height, 175 inches (4.44 cm). There
should be nothing between the equipment that prevents air circulation.
- Be certain headend wiring and current capacity has adequate safety margins. Never
cascade AC powering strips. Use separate outlets. If AC power is subject to
fluctuation we recommend a constant voltage transformer be used. Beware of ground
loops and be certain all wiring is bonded and properly grounded. Consult a code book
as nwded.
o All equipment racks should be electrically bonded together and earth grounded.
o All equipment interconnecting RF cables should be a minimum of double shielded and
quad shielded is recommended Poorly shielded cable cans-a cross-modulation picture
degradation between equipment.
- always use the coax connector intended for the coaxial cable used. Be certain it is
installed as recommended by the manufacturer. Connectors should be RFI shield type.
a RF input and FR output cables should be on opposite sides of the equipment rack,
Never bundle input and output RF cables together.
- Operate each modulator and processor at the RF output levels recommended. lfit is
necessary to reduce RF output level, always operate the equipment as recommended
and reduce the RF output level with the appropriate value ‘barrel—ty'pc‘ pad.
0 Equipment RF test points are only relative indicators of the actual RF output level and
may vary +/— dB. All RF operating level measurements should be made at the RF
output of each unit.
. When the headend is initially piaced in servrce, create a log record of all operating
parameters for each channel’s equipment. Referring to these records during routine
maintenance allows recognition of any operating changes.
Agile Processor
P~379
FEATURES
- Totally Microprocessor Controlled with Self-Diagnostic Monitoring
Selectable Input Channels
Off Air Channels 2 through 8] (VHF and UHF)
Standard Cable Channels 2 through 18] (54 MHz - 1.20Hz)
HRC Channels 1 through 81 (72M}Iz- l.ZGl-lz)
Selectable Output Channels
Standard Cable Channels T7 through 118 ( 7Ml‘lz - 750M1-lz)
I-IRC Channels 1 through 118
Automatic Input Offset Control:
Unique Circuit Detects and Corrects Input Signal Offset Frequency for
Heterodyne Processing Before the IF
SAW Filtered EF Designed for Adjacent Channel Operation
+60dBmV Output Using Low-Distortion Hybrid Amplifiers
Non-volatile Channel Memory
Synthesized Oscillators
Crystal Referenced Phase Locked
Digital LED Readout
Internal Switch Selects Standard or HRC Output
Surface Mount Technology Construction
RF Muted During Tuning
AVAILABLE OPTIONS
All CADCO frequency agile modulators may be set for HIRC frequency output. This
feature is controlled by an internal dip switch assembly DS-l. The switch is located near
the right front comer ( front panel towards you) between the test point and the output
converter module. DS-l is clearly marked on the PCB. Switch #3 placed in the OFF
position switches the output Frequency to l-{RC on all channels. The switch is
T-Channel Input
Dual R5232 Control Option for Daisy Chain Capability
Defeatable AGC for Manual Gain Control
HRC Output Frequency Set
normally set “ON” at the factory.
Operating Instructions
Model P~379 Agile Processor
INTRODUCTION
CADCO thanks you for purchasing the Model P~379 Heterodyne Low-Noise Processor.
The P~379 contains the latest in CATV electronics, including Symhesized Crystal
Referenced Phase Locked Oscillators, Microprocessor control. SAW Filtered H7, and
Hybrid Amplifiers. Now in addition to these features, the new P~379 (U 5. version)
contains Automatic Input 05“ set to remove input ofi‘sets inherent to Off-Air (0, +10KI-Iz),
Standard Cable (0, +12i5,+25KHz) and HRC Cable (0.3 KHz master oscillator offset).
Setup and Operation
Processor P~379
1, Connect the input to a signal source such as a cable drop or antenna. The
recommended input level for best performance is 0 to +10 dBmV (+60 to
+70 dBuV). Connect the output to a 75 ohm load, normally a channel
combiner. A Hybrid Combiner, such as the CADCO Combiner 24—1000, is
strongly recommended for flat response and maxinwm isolation between
channel.
2. The Automatic Input Ofi'set feature automatically removes any input ofi'set
and the microprocessors selects the proper FCC ofl'set for the output
channel, therefore no calculations or adjustments are required
3. Connect to a proper AC electrical source as indicated on the back ofthe
imit. Observe the‘fi'ont panel Display Window while power is applied. All
the elements of the displays will be turned on momentarily as a display test.
The following numbers displayed alter the LED test will be the
microprocessor software version, the internal option dip switch settings,
and finally the last frequency tuned. Afier a moment, the Lock Detect
LED will illuminate. The unit is now ready for operation.
4. The desired input and output channel of operation is self,» cd by the front
panel CHANNEL SELECT toggle switch Ifyou require a lower Channel
Note:
than the one currently displayed, push the toggle switch DOWN. The
channels will change one at a time as many times as you press the switch.
Holding the select switch in the DOWN position will “scan“ to the desired
channel. lfyou desire a higher channel, push the toggle switch UP, The
Channels will change one at a time as many times as you press the switch.
Holding the select switch in the UP position will “scan” to the desired
channel. It is normal for the FREQUENCY LOCK LED to be
extinguished during and for a few seconds afier changing channels. The
RF OUTPUT in muted when the FREQUENCY LOCK LED is ofi‘. This
insures moving RF carriers do not interfere with any existing channels on
the cable system. FCC ofi‘sets (in US. versions) are microprocessor
controlled and fully automatic for both Standard and HRC channels.
Using a Field Strength Meter or Spectrum Analyzer to either the rear panel
RF OUTPUT or front panel -20dBmV TEST POINT, adjust the front
panel OUTPUT LEVEL control to the desired level. The recommended
output level is between +SSdBmV (+1 lSdBuV) and +60dBmV
(+120clBuV), lfthe TEST POINT is used for this adjustment, the RF
OUTPUT must be terminated
The optimum input signal level is +lOdBmV (+70 dBuV) to be
centered within the AGC window. Signal input levels less than
OdBmV (+60 dBuV) may require an antenna-mounted preamplifier.
An alternative is to increase signal gain by stacking two or more
antennas. Remember, the processor’s AGC will increase gain for
fiill output, but with inadequate input signal level the Signal to
Noise ratio wfl‘ers.
When in the 05-Air position for INPUT SOURCE, observe the Aural
Carrier level on a Field Strength Meter or Specn-um Analyzer and adjust
the AURAL CARRIER LEVEL control for the desired Visual to Aural
Carrier level ratio. Nomal operation 05 the Aural Can-ier is l} to 17
below the Visual Carrier. When switching to either of the cable frequency
plans, the intemal aural carrier attenuator drops automatically from 6 to
053, since Cable Aural signals have been preset down at the header-id.
readjustment when switching between frequency plans may be desire’d.
7. The Model P~379 processor accepts and passes-through television station
broadcast stereo.
8. To use the T-Channel Input Option, move the T-Channel switch located on
the back panel to the on position, The green T-Channel Indicator LED,
located on the front panel, will light up when in the “ T “ band. When the
T-Channel switch is on only the “ T “ band may be used.
IMPORTANT
CADCO power supplies are designed so under certain power line or heat buildup
conditions the units shut ofif An indication is no RF output, but the POWER LED
remains on Ifthis occurs, unplug the power cord and wait two minutes before
repoweringl Upon applying power, you should again have RF output. Ifnot, or should
the unit return to shutdown mode, telephone CADCO or your Distributor for assistance
CADCO highly recommends a 1.75 inch air circulation space between any rack mounted
equipment
ECADCO
SYSTEMS,INC.
HRDADRAND EQUIPMENT
2363 Merritt Drive
Garland, Texas 75041
Phone 800-877-2288 or 972-27143651
Fax 972-271-3654
www.cadcosystems.com
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