Pineapple Technology DTC25U 25 WATT ATSC TRANSCODER User Manual DTC25U

Pineapple Technology, Inc. 25 WATT ATSC TRANSCODER DTC25U

DTC25U User Manual

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Document DescriptionDTC25U User Manual
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Date Submitted2007-01-05 00:00:00
Date Available2007-02-21 00:00:00
Creation Date2006-11-14 07:49:45
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Document TitleDTC25U User Manual
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DTC25U TRANSCODER
INSTRUCTION MANUAL
PINEAPPLE TECHNOLOGY, INC
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
TABLE OF CONTENTS
Section l --- SAFETY NOTICES ………………………………………………………………………… 2
** READ THIS SECTION BEFORE INSTALLATON **
Secton ll --- TRANSCODER SPECIFICATIONS …………………...…………………………………
Section lll --- TRANSCODER INSTALLATION ………………………………………………………
Section lV --- TRANSCODER TURN-ON ………………………………………………………………
Section V --- THEORY OF OPERATION
A. Introduction ………………………………………………………………………………
B. XC100LC Regenerative Transcoder Module and Up Converter………………………
C. LTX Mainframe Assembly ………………………………………………………………
D. BPUD100 Digital Mask Filter………………………………………………………………
E. Low Pass Filter (Optional)…………………………………………………………………
SECTION Vl --- SCHEMATIC AND PARTS LISTS
A. DTC25U…………………………………………………………....................................
B. LTX Mainframe Assembly…………………………………………………………………
C. BPUD100Digital Mask Filter………………………………………………………………
D. Low Pass Filter……………………………………………………………………………
10
12
14
15
SECTION Vll --- RECOMMENDED ROUTINE MAINTENANCE …………………………………… 16
SECTION Vlll --- ADJUSTMENTS AND TUNING ……………………………………………………
17
SECTION lX --- PROBLEM SOLVING / TROUBLESHOOTING …………………………………… 18
SECTION X --- WARRANTY ……………………………………………………………………………
20
Section I
Safety
Notices
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
l --- SAFETY NOTICES
l ---SAFETY NOTICES
** READ THIS SECTION BEFORE INSTALLATION **
SEVERE ELECTRICAL SHOCK OR BURNS MAY OCCUR
IF THIS EQUIPMENT IS USED IMPROPERLY.
NEVER WORK ON THIS EQUIPMENT ALONE. ALWAYS HAVE ANOTHER PERSON PRESENT
WHILE WORKING ON ELECTRICAL CIRCUITS OR MOVING EQUIPMENT. COMMUNICATIONS
TO EMERGENCY SERVICES SHOULD BE AVAILABLE AT ALL TIMES.
BEFORE CONNECTING THIS EQUIPMENT TO ANY AC ELECTRICAL SOURCE READ THE
SECTION ON INSTALLATION. ALL ELECTRICAL WIRING FOR THIS EQUIPMENT MUST BE
PERFORMED BY QUALIFIED ELECTRICIANS. ALL WIRING MUST BE COMPLIANT WITH
LOCAL ELECTRICAL CODES.
POWER AMPLIFIERS AND SUPPLIES ARE HEAVY. TO INSTALL THIS EQUIPMENT IN RACKS
USE TWO (2) PERSONS TO AVOID POSSIBLE INJURIES.
NEVER OPEN THE CABINET ENCLOSURE OR UNPLUG CABLES OR WIRES WHILE THIS
EQUIPMENT IS OPERATING.
ALL SERVICE WORK MUST BE PERFORMED BY QUALIFIED TECHNICIANS ONLY.
IF ONE IS NOT AVAILABLE LOCALLY, CONTACT PINEAPPLE TECHNOLOGY, INC. FOR
A LIST IN YOUR AREA.
Page 2
Section II
Transmitter
Specifications
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
II – TRANSCODER SPECIFICATIONS
II – DTC25U SPECIFICATIONS
Power Output ………………………… 25W Average
RF Output Impedance………………… 50 ohms
Frequency Range……………………… 470 – 806 MHz
Frequency Stability…………………… ± 1,000 Hz
Error Vector Magnitude………………. 4% Maximum
Digital Signal to Noise……………….. 27 dB
Group Delay with Output Filter………. ± 25 ns
Harmonic Output………………............ -50 dB
Spurious Output………………………. -50 dB
Spectrical Mask with Output Filter…... -46 dB @ Channel Edge
-85 dB ± 6 MHz
Ref. channel edge below average transmitted power
(Watts/5.4 MHz)
Phase Noise……………………………. -106 dBc/Hz @ 20 kHz
Operating Temperature……………….. -10 to +35 degrees Celsius Ambient
+14 to +95 degrees Fahrenheit Ambient
Altitude……………………………….. 5,000 ft without additional cooling
Cooling Requirement…………………. Built in, except where noted
Connectors……………………………. F Connector Input, N Connector Output
Power Consumption…………………… 500W maximum
AC Line Voltage……………………… 85 – 120 VAC Single Phase
Weight………………………………… 100 lbs
Dimensions…………………………… 21” x 16” x 24” (W x H x D) Standard
THESE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Page 3
Section III
Transmitter
Installation
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
lll -- TRANSCODER INSTALLATION
lll -- TRANSCODER INSTALLATION
To ensure long and reliable trouble-free service from the DTC25U transcoder the following steps
for installation are recommended:
1.
MECHANICAL INSTALLATION: The DTC25U Transcoder was designed to be installed in a building
protected from the weather. The building should have a hard-surface floor such as concrete with a
moisture barrier. This barrier could be pressure-treated wood sub flooring which could be anchored
to the concrete and to the transmitter to make the installation earthquake resistant.
Allow a minimum of three feet around the transmitter cabinet for service access. The top of the
transmitter should be clear for three feet above to allow the air to exhaust from the transmitter.
Provisions for air inlet and exhaust from the room must allow air flow with minimal obstruction.
In the event that the room temperature exceeds 35º Celsius (95º F), cooling air must be provided
so that the room temperature will not exceed 35 degrees Celsius under worse case conditions.
Notice: This equipment is HEAVY and must be handled by professional movers with proper
equipment. Any damage caused by the installers is not covered under warranty. Check to ensure
that installing crews have proper insurance coverage.
2.
GROUNDING: Transmitter grounding is VERY IMPORTANT and must be done correctly for
safety and operational reasons. A typical installation may be done as follows:
Use a heavy gauge wire such as 16 AWG stranded copper. The bonding between the transmitter
and the ground rods must be good quality and protected from corrosion. The ground wires should
run over the floor and be connected to the ground rods located outside the building. The wire
should not go thru the concrete floor but over and around it.
3.
AC WIRING: The DTC25U transcoder comes with a three wire 110 VAC standard plug for
connection to a 110 VAC electrical outlet. It is recommended that the electrical outlet be protected
with its own separate breaker and used only for the transcoder.
NOTICE: All wiring of this type, except for the actual connection to the AC plug, must be done
by a QUALIFIED ELECTRICIAN and must conform to LOCAL and NATIONAL wiring CODES.
Consult with your electrician to ensure that the proper breaker size is selected for the main circuit.
4.
ANTENNA CONNECTION: The transcoder is equipped with an N connector for output power to the
transmit antenna and an F connector for connection from the receive antenna.
Page 4
Section IV
Transmitter
Turn-On
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
lV -- TRANSCODER TURN-ON PROCEDURE
lV --- TRANSCODER TURN-ON PROCEDURE (Page 1 of 3)
See the previous section on installation before proceeding with this section. Improper installation of the
transcoder can cause serious damage to the equipment or operating personnel and may void
manufacturers warranty. Initial turn on and check out is very important for the broadcast engineer to
learn how to setup and operate the transcoder. Following these steps will ensure long and reliable operation:
1.
Check the transcoder output load or antenna for proper installation and connection to the transcoder.
2.
Inspect the transcoder front and back to check for broken items or lose fitting items. These must
be replaced or properly secured before turning the transcoder on. Pay special attention to all RF
connectors including transmit coaxial cable and antenna.
3.
Check the AC breaker and on/off switches to ensure that all are in the OFF position.
4.
Verify the switch on the power strip at the back of the cabinet and the power switch on the front of the
LTX Mainframe are in the OFF position. Plug in the AC power cord to a nearby 110 AC electrical
connector with associated, appropriately sized, circuit breaker.
5.
Verify the output power level on the Drake Upconverter is set to minimum ( GAIN fully CCW ). See Fig 1
below for location. On the LTX Mainframe verify XMTR switch is in STBY.
6.
Refer to the transcoder and upconverter instruction manuals in the DTC25U User Manual to locate the key
functions and become familiar with the unit. Insure that all connections, including the DC power
connection and the RF (IF) connection, between the 8VSB Regenerator and Upconverter have been made.
7.
Verify, using the front panel display on the transcoder upconverter, that the correct output channel has
been selected. At this time, no connection should be made to the transcoder input at the back of the unit.
Any following measurements will be done using the Null Packets generated inside the transcoder.
8.
Turn-on the switch located on the power strip at the rear of the DTC25U. Note: The Larcan Transcoder
will come on at this time as well as the cabinet fan. A green light indication should be seen on the Drake
Upconverter and, after a few minutes, the two green lights on the transcoder will turn red indicating proper
operation.
9.
Locate and turn on the front panel breaker found on the LTX Mainframe and set the XMTR switch
to the ON position.
MAKE THE FOLLOWING OBSERVATIONS
METER READINGS
TYPICAL
DC SUPPLY VOLTAGE
32 VDC
PA1 DRIVER CURRENT
1.7 AMPS ± 20%
PA2 FINAL CURRENT
2.7 AMPS ± 20%
PA3 FINAL CURRENT
1.3 AMPS ± 20%
RF OUTPUT POWER
10 TO 50%
RFL'D POWER
< 10%
NOTE STATUS LIGHTS
FAN
GREEN
TEMP
GREEN
+DC
GREEN
THE FAN SHOULD BE MAKING SOME NOISE
Page 5
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
lV -- TRANSCODER TURN-ON PROCEDURE
lV --- TRANSCODER TURN-ON PROCEDURE (Page 2 of 3)
Note: Allow the DTC25U to warm up for at least one (1) hour before making the final adjustment.
If transmitter is not warmed up, the output power will require re-adjustment to proper level when it is warm.
10.
Select the FWD Power setting on the rotary switch associated with the front panel meter on the LTX
Mainframe assembly. Slowly adjust the power level setting on the Drake Upconverter while observing the
output power level on the front panel meter until the meter reading indicates 100% output power.
RECORD AND RETAIN THE FOLLOWING OBSERVATIONS FOR FUTURE REVIEW IF NECESSARY.
METER READINGS
TYPICAL
DC SUPPLY VOLTAGE
32 VDC
PA1 DRIVER CURRENT
1.8 AMPS ± 20%
PA2 FINAL CURRENT
3.4 AMPS ± 20%
PA3 FINAL CURRENT
2.8 AMPS ± 20%
RF OUTPUT POWER
90 TO 100%
RFL'D POWER
< 10%
NOTE STATUS LIGHTS
FAN
GREEN
TEMP
GREEN
+DC
GREEN
FIG. 1
Page 6
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
lV -- TRANSCODER TURN-ON PROCEDURE
lV --- TRANSCODER TURN-ON PROCEDURE (Page 3 of 3)
11. The receive signal antenna can now be connected to the input of the transcoder as required.
Note: The receive antenna should be located so that it will not pick up the transmitter output
signal. Even when the input and output channel separation may seem to be considerable,
the input receiver front end can be over loaded. This will reduce the sensitivity of the
receiver resulting in degraded or loss of signal when viewed at the DTC25U transmit out.
Page 7
Section V
Theory
of
Operation
PINEAPPLE TECHNOLOGY, INC.
UTX1K ULTRA Operating and Service Manual
V -- THEORY OF OPERATION
V --- THEORY OF OPERATION (Page 1 of 2)
A. INTRODUCTION
The DTC25U transcoder was designed to meet or exceed all FCC applicable specifications for
TV broadcast equipment. Special attention was given to the selection of sub-assemblies and components
to achieve maximum reliability and minimum down time. The construction of the DTC25U is
BASIC and MODULAR with most components field replaceable. Special emphasis was placed on
"KEEPING IT SIMPLE" and returning to more traditional transmitter layouts and instrumentation.
Refer to the DTC25U block diagram for an overview of the transmitter architecture. This will
give the technician basic information needed to understand the operation of the transmitter and the function
of each subassembly.
SEE SECTION Vl.A FOR PARTS LIST AND BLOCK DIAGRAM.
B. XC100LC Regenerative Transcoder
B-1 Exciter
Refer to the Larcan user manual for information on the exciter portion of the transcoder.
SEE SECTION VI.B FOR SCHEMATIC AND PARTS LIST
B-2. Drake Up Converter
Refer to Drake user manual for information on the operation of this portion of the transcoder.
Page 8
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
V -- THEORY OF OPERATION
V. THEORY OF OPERATION (CONTINUED) (Page 2 of 2)
C. LTX Mainframe Power Amplifier
Cabinet - The cabinet is constructed of heavy gauge steel and is very durable. This enclosure is
painted black and is resistive to harsh environment. Standard 19 inch rack mounting.
LTX-D1 Mainframe Assembly - Internal sub-assemblies include the following:
1.
DC Power Supply
2.
RF Deck
3.
Status Monitoring (1A0035)
4.
Output Power Detector Board (1A0027)
5.
Reflected Power Detector (1A0029) and Shutdown Switch
6.
Metering and Monitoring Assembly (1A0300)
For details of this sections above, see appropriate sections in this manual.
D. BPUD100 Digital Mask Filter
The FCC Stringent Mask filter supplied with the DTC25U transcoder is designed to completely
satisfy the FCC Rules for a low power TV transmitter and translator.
This is a closed unit and does not require field adjustment.
E. Optional Low Pass Filter
This low pass filter is required and will be supplied with DTC25U translators that operate on
Channels 22 - 24, 32 - 36 and 38 for the specific purpose of providing "out of band" protection to
Radio Navigation Satellite Services.
Page 9
Section VI
Schematic
and
Parts List
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
A.
Vl -- SCHEMATICS AND PARTS LIST
DTC25U Assembly Tree
Item Qty Type P/N
Title
Detail
CAT DTC25U
UHF TV TRANSCODER 25 W RMLARCAN EXCITTER/CONVERTER
PS
DIGITAL MASK FILTER UHF TV 100 WATTS RMS
PL
LTXMAINFRAME
LTX SERIES XMTR 100 W UHF BASIC UNIT
PS
XC100LC
TRANSCODER, LARCAN
Top
BPUD100
Page 10
UHF DIGITAL TRANSLATOR
AC Inlet
Ant
RF In
Larcan
8VSB Regen
Transcoder
DC Out
IF
XC100LC
RF Input
DC Inlet
Drake
DCU860
Up Conv
AC Inlet
RF Input
RF Output Mon
LTX-D1
Mainframe
Assembly
RF Probe
DB9
Page 11
Remote
Interface
SIZE
1:1
FSCM NO.
SCALE
SHEET
DTC25U
DigitalDWGTranscoder
NO.
Pineapple Technology, Inc.
Rocklin, CA
Optional
Low Pass
Filter
as required
Mask
Filter
REV
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
B.
Vl -- SCHEMATICS AND PARTS LIST
LTX-D1 Mainframe Assembly Tree
Qt Typ
Item y e
P/N
Title
Detail
PL LTXMAINFRAMLTX SERIES XMTR 100 W UHF
BASIC UNIT
PS MF9529A
LTX HEAT SINK HOLDER
AL 090
PS MF9531A
LTX FRONT PANEL
0125 AL W/PAINT AND SILK
PS MF9532A
LTX CHASSIS
090 AL ALODYNE W/REAR SILK
PS MF9533A
LTX AIR DAM DEFLECTOR
050 AL ALODYNE
PS MF9534A
LTX TOP COVER
O60 AL ALODYNE
PL MF9535
LTX100U HEAT SINK
STD HEAT SINK W/U250LD FP
PS MF9536
LTX100 VHF HIGH HEAT SINK
STD PTI HS MATERIAL
PS MF9537
LTX100 VHF LOW BAND HEAT SINK STD PTI HS MATERIAL
PS MF9538
LTX200U HEAT SINK
10
PS PC9515
COUPLER GP COVER TMM3 0125
USE ON ALL -30dB COUPLERS
11
PS PC9514
UHF -30 dB COUPLER TMM3 0125
DUAL DIRECTIONAL
12
PS PC9513
VHF HB -30 dB COUPLER TMM3015
DUAL DIRECTIONAL
13
PS PC9512
VHF LB -30 dB COUPLER TMM30125 DUAL DIRECTIONAL
14
PS 660104
LTX MULTI-FUNCTION METER
15
PS AC3108
CIRCUIT BREAK/ ON/OFF SWITCH
115 VAC 10 A RESETABLE
16
PS AC1003
FILTER, AC LINE
110/220 AC PLUG
17
PS 990200
FILTER, AIR DRY
COMAIR FILTER/GUARD ASS,Y
18
PS 851035
FAN AC 115 100 CFM 115 VAC
COMAIR-ROTRON MUFFIN XL AC MX2A3
19
PS CA5110
CABLE ASSEMBLY 10 WIRE
10 WIRE SOC TO SOC CONNECTOR
20
PS 480300
CON 2 PIN HEADER
AMP A23837-ND
22
PS AC2010
DC POWER SUPPLY 115/220 VAC
320 WATTS 27-31 VDC
23
PS INHOUSE_LABPTI LABOR
24
PS INHOUSE-ENGENG TESTING AND FIXIT
LOADED
25
PL 1A0300
LTX100 METERING CIRCUIT
FRONT PANEL ASSEMBLY
26
PL 1A0027
PWR MONITOR CK
PC9052B CBR
27
PL 1A0035
PA STATUS BOARD
PC9061H
28
PL 1A0026
VSWR/PWR DET BRD
PC9051A
29
CAT DRV10-40
DRIVER AMP WITH ALC CKT PO10W
31
PS BPU150N
BP FILTER 150 W UHF
32
O PS BPVH300N
BP FILTER 300W VHF HB CL3NV (M) NTYPE N CONNECTORS
33
34
35
36
37
38
39
BP FILTER LTX XMTR VHF LB
FINGER GUARD 6"
PATRIOT AC FAN 110 V
AURAL FEMALE PNL CONNECTOR
AURAL MALE PLUE XLR
TOGGLE ON/OFF
Top
PS
PS
PS
PS
PS
PS
PS
BPVL200N
990280
851030
481501
481502
484025
491350
U250LD MTG WITH DRIVER
HOYT MODEL 3135 ANALOG MTR
LOADED
Page 12
470-862 MHz
TYPE N CONNECTORS 200 W
FINGER GUARD 150MM METAL
XL100 EXHAUSE FAN
XLR TYPE 3 PIN
3 PIN
FLAT LVR 2 PIN
Page 13
FWD Pwr P1
P2
P3
Gnd P4
Shutdown P5
P6
RFLD Pwr P7
ALC P8
+8 VDC P9
110 VAC
RF
DB9
PA Fan
110VAC
ON\OFF
SW
+DC
RF IN
110 VAC
AC Inlet
PS1
Power
Supply
27VDC 11A
DVR10U
DC Output
From
RF Output
Monitor Tap
+DC
RF IN
U250LD
RF Deck
DC Metering
and
DC Monitoring
1A0300
LTX-D1 Mainframe
SCALE
1:1
FSCM NO.
DWG NO.
SHEET
REV
LTX-D1 Mainframe Assembly
SIZE
RF
RF Probe
Pineapple Technology, Inc.
Rocklin, CA
Directional
Coupler
CAL
ATT
CAL
ATT
SECTION VI - SCHEMATIC AND PARTS LISTS
SUB-SECTION C - DTC25U
No Serviceable Parts
Pineapple Technology, Inc.
Rocklin, CA
BPUD100 Stringent Mask Filter
SIZE
Page 14
SCALE
FSCM NO.
DWG NO.
REV
SHEET
SECTION VI - SCHEMATIC AND PARTS LISTS
SUB-SECTION D - DTC25U
Used as required
No Serviceable Parts
Pineapple Technology, Inc.
Rocklin, CA
SIZE
Page 15
SCALE
Low Pass Filter
CIRCUIT
DIAGRAM
FSCM NO.
DWG NO.
SHEET
REV
Section VII
Recommended
Routine
Maintenance
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
VII -- ROUTINE MAINTENANCE
VII --- ROUTINE MAINTENANCE
Routine Maintenance on the transmitter is very simple and straight forward. PTI recommends the following
steps to ensure long and eliable trouble-free service.
SCHEDULE: DAILY OR WEEKLY SERVICE
1.
Check output power level to ensure that the meter is reading in the GREEN. If the level has changed
adjust the output level to 100% using the modulator output level adjust.
2.
Check and record all meter readings in the station log.
3.
Review readings and compare to history for possible variation that could indicate problems.
4.
Check the air inlet filter and clean if necessary. If it looks dirty, it is dirty. Snap off the front grill and
wash the filter with light detergent and dry thoroughly before reinstalling. DO NOT use oils on the
filter.
5.
Clear any items placed in front or in the rear of the transmitter that may restrict air flow.
NOTICE: SMALL FURRY ANIMALS LOVE THE WARMTH THE TRANSMITTER PROVIDES. ALWAYS
CHECK FOR ANY ACTIVITY BY THESE VISITORS AND SET TRAPS OR BAIT AS NECESSARY.
SCHEDULE: MONTHLY +
All the items listed above with air filter cleaning necessary.
NOTE: REPLACEMENT FILTERS ARE AVAILABLE THRU MOST ELECTRONIC DISTRIBUTERS.
LOOK FOR COMAIR ROTRON P/N: 020172
Page 16
Section VIII
Adjustments
and
Tuning
PINEAPPLE TECHNOLOGY, INC.
DTU25C Operating and Service Manual
VIII -- ADJUSTMENTS AND TUNING
VIII --- ADJUSTMENTS AND TUNING
The DTU25C is a new series of digital transcoders offered by Pineapple Technology, Inc. The
latest in LDMOS device and circuit technology are employed to ensure reliable and serviceable
operation for many years.
There are very few adjustments necessary to maintain full service condition. Typically the gain
adjustment shown in the initial Transcoder Turn-On Procedure (Section IV) of this manual should
require minimal attention. The front meter panel has been set up so that 100% indication in
Forward Power is equivalent to 25W average output power.
The input frequency (channel) can be adjusted, within the auspices of the broadcasting
re-transmission rights, to the appropriate required channel (See Larcan Manual). The transmitter
output must remain on the channel licensed by the FCC and in accordance with the supplied
digital mask filter.
Page 17
Section IX
Problem
Solving
Troubleshooting
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
IX -- PROBLEM SOLVING/TROUBLE SHOOTING
IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 1of 2)
The DTC25U is a "MODULAR ASSEMBLY" where most of the sub-assemblies can be
removed and or replaced as necessary as necessary to maintain full service. To service this transmitter,
it is best to become familiar with the various sub-assemblies by reviewing the transmitter block diagram
and it's associated subs shown in the introduction. Any work performed on a transmitter licensed by
the FCC must be performed by qualified personnel.
FAILURE ANALYSIS STARTS WITH THE FOLLOWING ASSUMPTIONS:
1. The transmitter is connected to an AC source which is within the specified voltage range
and has ample power to run the transmitter.
2. The antenna has been checked out and a proper match has been verified.
3. The room temperature is < +35 degrees Celsius (+95 degrees Fahrenheit)
4. There are no restrictions in the air flow in or out of the building.
5. The video and aural signals to the modulator comply with stated specifications.
CHECKING THE WARNING LIGHTS
There are several warning signals visible on the front of the transmitter that will alert the technician
of possible problems. When viewed from the front, all the lights should be GREEN indicating normal
operation. An alert signal is indicated by a RED light. We will focus on RED alert signals in this section.
LTX Mainframe Assembly
FAN FAULT
RED indicates that the fuse supplying AC to the fan has failed. The fuse
is located just inside the front panel near the top. See Fig. 1 for location.
CHECK: FUSE AND/OR FAN
Fig. 1
Page 18
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
IX -- PROBLEM SOLVING/TROUBLE SHOOTING
IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 2of 2)
TEMP FAULT
RED indicates over temperature of PA or High VSWR
If High VSWR, the light will cycle 10 seconds OFF and 2 seconds ON
Put transmitter in STANDBY. Investigate antenna installation and
connections, check transmission lines and connections. Check
that transcoder up converter is on frequency.
If High Temperature, the light will cycle OFF for several minutes then ON
for several minutes.
Check: Room temperature
Check: For Blocked Air Filter
Check: For Blocked Air Flow
Check: Transcoder Drive level. Verify output power is at 100% or less.
NOTE: If the AC Power is ON and all LED's are OFF and all meter readings are Zero (0) the DC Power
Supply may cycle on and off if the internal fan has failed or Hi temp has failed. The
internal DC supply may have failed and needs replacing.
Transcoder Assembly
The Transcoder Assembly consists of the Larcan receiver and the Drake up converter. For
adjustment of the transcoder and understanding fault indications, refer to the Larcan and
Drake manuals.
Page 19
Section X
Warranty
PINEAPPLE TECHNOLOGY, INC.
UTX1K ULTRA Operating and Service Manual
X -- WARRANTY
X -- WARRANTY
The WARRANTY provided by Pineapple Technology, Inc. (PTI) on this transmitter is detailed below.
It should be noted that some of the equipment sub-systems have warranty coverage by the orginal
manufacture that differs from the standard warranty provided by PTI Warrantydetails on equipment falling
into this category may be found in the Manufacturers instruction manual provided with the transmitter.
In all cases, replacement units of this equipment are normally in stock at PTI for quick turn service
support to our customers during the PTI Standard Warranty period.
STANDARD WARRANTY
Seller warrants that each Product sold by it is free of defects in materials and workmanship. Seller's
obligation under said warranty continues for a period of one (1) year from date of shippment. Repairs or
replacement of defective parts shall be the sole and exclusive remedy under waranty, at Seller option,
provided that Seller may, as an alternative, elect to refund an equitable portion of the purchase price
of the product. THIS WARRANTY IS EXPRESSLY IN LIEU OF AND EXCLUDES ALL OTHER
EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO WARANTIES OF
FITNESS FOR A PARTICULAR PURPOSE, USE, OR APPLICATION, AND ALL OTHER OBLIGATIONS
OR LIABILITIES ON THE PART OF THE SELLER, UNLESS SUCH OTHER WARRANTIES
OBLIGATIONS OR LIABILITIES ARE EXPRESSLY AGREED TO IN WRITING BY SELLER.
WARRANTY REPLACEMENT AND REPAIRS
All claims under warranty must be made promptly after occurrence of circumstances giving rise to thereto
and must be received within the applicable warranty period by seller or its authorized representatives.
Such claims must be documented on a PTI* Field Failure Report with a full description of the circumstances
giving rise to the claim. Before any products are returned for repair and/or adjustment, written authorization
form seller or its authorized representative for the return and instructions as to how and where these
products should be shipped must be obtained. This is to include a Return Authorization (RA) number
provided by the seller or authorized representative, this must accompany ALL returns. Any product
returned to the seller for the examination shall be sent prepaid via the means of transportation indicated as
acceptable by seller. Seller reserves the right to reject any warranty claim not promptly reported and any
claim on any item that has been altered, i.e. circuit modifications, components removed, or has been shipped
by non acceptable means of transportation . When a product has been returned for examination and inspection,
or for any other reason, customer shall be responsible for all damage resulting from improper packaging or
handling, and for loss in transit, notwithstanding any defect or nonconformity in the product. In all cases the
seller has sole responsibility for determining the cause and nature of the failure, and the Seller's
determination with regard thereto shall be final. If it is found that Seller's Product has been returned without
cause and is still serviceable, customer will be notified and the Product returned at its expense, in addition,
a charge for testing and examination may, in Sellers sole discretion be made on Products so returned.
* A field Failure Report is included at the end of this manual - Additional Field Failure Reports can be obtained by calling
Pineapple Technology, Inc. at (916) 652-1116 or you may download one from our website at www.ptibroadcast.com
in the Warranty section.
Page 20

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