exhndbkb, Schematy
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HANDBOOK
FM SERIES
BROADCAST FM EXCITERS
PTEK
Limited Warranty
PTEK (SELLER) warrants that products are free from defects in material and workmanship and meet
performance specifications provided, however, that:
(A) SELLER’ liability under this Warranty is limited to repairing or replacing, at its option, any
product delivered here under not conforming to this Warranty;
(B) This Warranty is limited to a period of two years;
(C) Minor deviations from specifications which do not affect performance are excluded from this
Warranty; and
(D) SELLER shall be liable under this Warranty only if:
(1) It is promptly notified in writing by the Buyer upon discovery of the failure of any product to
conform to this Warranty,
(2) The product is returned to SELLER, transportation charges prepaid by the Buyer,
(3) The product is received by SELLER not later than ten days after the last day of the one-year
period of this Warranty, and
(4) SELLER’ examination of the Product discloses to SELLER’S reasonable satisfaction that
such defects or failures as may exist have not been caused by misuse, neglect, improper
installation, repair, alteration, accident or shipping.
The Buyer will prepay freight to and from SELLER on products serviced here under at SELLER’ plant; but
SELLER may, at its option, elect to perform any repairs here under at the Buyer’s place of business.
The foregoing constitutes SELLER’S entire Warranty expressed, implied and/or statutory, except as to
title, and states the full extent of SELLER’S liability to the Buyer or to any other party for any breach of
such Warranty and for damages, whether direct, special, incidental or consequential; and, other than as
expressly provided in this document. No Warranties, expressed or implied, including any Warranty or
merchant ability or of fitness for a particular purpose, are made. No employee, representative or agent of
SELLER has any authority, expressed or implied, to alter or to supplement the terms of this Warranty.
Warranty Service
The Limited Warranty covers parts and labor to the original purchaser for one year. Damage
caused by misuse or shipping is excluded from the warranty. Before returning units or material,
contact the factory for a Returned Material Authorization (RMA) number. Ship all material
prepaid. Defective material should be addressed to:
PTEK
Customer Service Manager
1814 Schooldale Drive
San Jose, CA. 95124
(408) 448-3342
Contents
Safety Notice .................................................................................................................4
Specifications ................................................................................................................5
Front &
Rear
Panel Layout .............................................................................................6
Installation .....................................................................................................................8
FCC, Accessory Connections & efficiency V O/P Pwr.................................................12
Schematic Synthesizer ...........................................................................................12-13
Schematic Chassis ..................................................................................................16-17
Schematic Chassis FM150E...................................................................................16-17
Schematic Power Module ......................................................................................18-19
Schematic Power Module FM150E..............................................................................20
Schematic Power Module Control FM150E.................................................................21
Parts list Chassis...........................................................................................................22
Parts list PA Boards......................................................................................................23
Parts list Synth Board ..................................................................................................25
Parts list LED Board ....................................................................................................25
Rev record
PROVISIONAL......................11/25/96
REV A.....................................1/16/97
REV B.....................................10/7/97
REV C.....................................4/13/99
REV D.....................................5/24/99
Page 3
Safety
BEFORE APPLYING POWER
Verify that the line voltage is 115V
GROUND THE EXCITOR.
To minimize shock hazard, the excitor chassis must be connected to an electrical ground. the excitor must be
connected to the ac power mains through a three-conductor power cable, with the third wire firmly connected to an
electrical ground (safety ground) at the power outlet. Any interruption of the protective (grounding) conductor or
disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury.
If the excitor is to be energized by any other source be certain the that chassis is connected to a separate safety
ground.
Fuses
Only fuses with the same required current, voltage rating, and specified type (normal blow, time delay, etc.) should be
used. Do not use repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard
.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the power amplifier in the presence of flammable gases or fumes.
DO NOT REMOVE THE EXCITOR COVER
Operating personnel must not remove the exciter cover. Component replacement and internal adjustments must be
made only by qualified service personnel.
Output connector
The type N output connector carries dangerously high RF voltages which present a shock and burn hazard.
operate this excitor with out the out put connector properly terminated in either an adequately rated load or antenna.
NEVER
Page 4
Specifications
MONAURAL
GENERAL
Audio Input Impedance:
Rated Power Output:
600 ohms, balanced
10W, 25W, 50W, 150W, 300W
Audio Input Level:
Power Consumption:
+10 dBm (6.93 volts peak-to-peak) at 600 ohms for
75 kHz deviation
750 W (for 300W model)
Frequency Range:
Audio Frequency Response:
87.7 to 108 MHz, in 200 kHz steps (other step
size to order)
+/-0.5 dB; flat or 75 microsecond pre-emphasis, 20
Hz to 15kHz (other time const. available)
Frequency Control:
Total Harmonic Distortion:
Phase locked loop frequency synthesis from high
stability master oscillator
0.15% max.; 20 Hz to 15 kHz
FM S/N Ratio (FM Noise):
Frequency Stability:
70 dB min. below 75 kHz deviation at 400 Hz,
measured within a 20 Hz to 15 kHz bandwidth with
75 microsecond de-emphasis
+/- 1.2 kHz
Output Impedance:
50 ohms
Asynchronous AM S/N Ratio (AM Noise):
60 dB RMS. below carrier; reference: 100% AM
modulation, at 400 Hz with 75 microsecond de-
emphasis, no FM modulation
Output Connector:
Type -"N" female
VSWR:
Synchronous AM SIN Ratio (Incidental AM Noise):
1.5:1 for full power, derate to 0 at inf.
57 dB below carrier; reference: 100% AM
modulation, full power at 400 Hz with 75uS de-
emphasis, FM +/- 75 kHz, 400Hz
Modulation Type:
Direct carrier frequency modulation
Modulation Capability:
Internally limited to 100 kHz deviation
ENVIRONMENT
Multi-Meter Indication:
Deviation, Forward Power, Reverse Power, Final
I&V
Altitude:
Ambient Temperature
-10 to +50
o
C
0-10,000 ft
Harmonic Attenuation:
-70 dB, min.
WIDEBAND
Inputs:
Composite Unbalanced 75 Ohms
SCA 1 Unbalanced 75 Ohms
Input Level:
3.5 V RMS. (10 Volts peak-to-peak) for 75 kHz deviation
Wideband Amplitude Response:
+/-0.5 dB, 20 Hz to 100 kHz
Page 5
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