HANDBOOK FM SERIES BROADCAST FM EXCITERS FM25E FM50E FM150E FM250E 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 two-year period of this Warranty, and
(4) SELLER examination of the Product discloses to SELLERS 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 Buyers place of business. The foregoing constitutes SELLERS entire Warranty expressed, implied and/or statutory, except as to title, and states the full extent of SELLERS 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 two 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 Parts list Chassis...........................................................................................................22 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 REV E....................................12/14/99 REV G........................................7/7/03 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. NEVER operate this excitor with out the out put connector properly terminated in either an adequately rated load or antenna. Page 4 Specifications M O N A U R A L Audio Input Impedance:
600 ohms, balanced Audio Input Level:
+10 dBm (6.93 volts peak-to-peak) at 600 ohms for 75 kHz deviation G E N E R A L Frequency Range:
87.7 to 108 MHz, in 200 kHz steps (other step size to order) Frequency Control:
Phase locked loop frequency synthesis from high stability master oscillator Audio Frequency Response:
+/-0.5 dB; flat or 75 microsecond pre-emphasis, 20 Hz to 15kHz (other time const. available) Frequency Stability:
+/- 1.2 kHz Total Harmonic Distortion:
0.15% max.; 20 Hz to 15 kHz FM S/N Ratio (FM Noise):
70 dB min. below 75 kHz deviation at 400 Hz, measured within a 20 Hz to 15 kHz bandwidth with 75 microsecond de-emphasis 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 Impedance:
50 ohms Output Connector:
Type -"N" female VSWR:
1.5:1 for full power, derate to 0 at inf. Modulation Type:
Direct carrier frequency modulation Modulation Capability:
Synchronous AM SIN Ratio (Incidental AM Noise):
Internally limited to 100 kHz deviation 57 dB below carrier; reference: 100% AM modulation, full power at 400 Hz with 75uS de-
emphasis, FM +/- 75 kHz, 400Hz Multi-Meter Indication:
Deviation, Forward Power, Reverse Power, Final I & V E N V I R O N M E N T Altitude:
0-10,000 ft Ambient Temperature
-10 to +50 oC W I D E B A N D Inputs:
Composite Unbalanced 10k Ohms SCA 1 Unbalanced 10k 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 Harmonic Attenuation:
-70 dB, min. F M 2 5 E Rated Power Output:
2 TO 30W Power Consumption:
100W F M 5 0 E Rated Power Output:
5 TO 60W Power Consumption:
200W F M 1 5 0 E Rated Power Output:
10 TO 200W Power Consumption:
500W Page 5 Front panel layout 1 2 3 4 30 100 OPERATE OUTPUT POWER W (REV X0.1) DEVIATION kHz 15 10 50 5 25 20 75 25 0 0 1.0 10 3.0 30 2.0 20 AMPS VOLTS PTEK 4.0 40 FM Series FORWARD POWER FINAL VOLTAGE REVERSE POWER FINAL CURRENT DEVIATION
. DEVIATION OFF REMOTE OFF DRIVE LOW FAULT ADJ POWER FM25E PTEK 8 7 6 5 Rear panel layout 1 2 3 AC IN FUSE 8 RF OUTPUT Page 6 COMPOSITE SCA 10MHz 1MHz 100kHz LOWER RAISE CURRENT VOLTAGE FINAL REMOTE OFF ON FWD REV PWR PWR GAIN GAIN GAIN MONO IN 600 OHMS 4 FREQUENCY 5 Key Element Description 1 METER Indicates Forward Power, Reverse Power, Final Voltage, Final Current and Deviation 2 OPERATE Switch and Indicator This switch sets the FM Broadcast Amplifier to the Operate Mode; 110 VAC is applied to the line transformers and this amber indicator is lit. 3 REMOTE OFF Indicator This red LED indicator is lit when the FM Broadcast Amplifier remote off terminals (rear panel) are open circuit. 3 DRIVE LOW Indicator This red LED indicator is lit when the FM Broadcast Amplifier can not make the power requested, because for example low drive power. 5 FAULT Indicator This red LED indicator is lit when the FM Broadcast Amplifier is in a fault condition. This can be for one or combination of the following:-
Over drive, High supply Voltage, High load VSWR, Over temperature. 6 Meter Select Switch This switch selects one of the following to be presented on the meter (1):-
Forward Power, Reverse Power, Final Voltage, Final Current and Deviation. 7 ADJ POWER control This control adjust the output power from rated full power to less than 50%. 8 Ventilation Filter This provides for filtering the environmental air as it is drawn into the cabinet by the internal fan (not used on FM10E). Key Element Description 1 AC IN & FUSE 110 VAC input and Fuse 10A 2 COMPOSITE Unbalanced wide band composite input 3 SCA 4 RF OUT Unbalanced wide band input TYPE N RF Output 5 FREQUENCY SELECTION Set switches for frequency selection (only takes effect when unit is switched from off to on) 6 Accessory connector Connections for; Remote off and DC indications of Forward Power, Reverse Power, Final Voltage, Final Current and Deviation. 8 SERIAL NUMBER Serial number for reference purposes Page 7 Installation-Electrical Refer to the Table below for the following description. The installer should assure the ac line voltage is turned OFF before performing this procedure. The electrical connections are installed at the Exciter rear panel. OR (NOT BOTH) FROM STEREO ENCODER OR STL COMPOSITE SCA 10MHz 1MHz 100kHz RF OUTPUT LOWER RAISE CURRENT VOLTAGE FINAL REMOTE ON OFF FWD REV PWR PWR GAIN GAIN GAIN MONO IN 600 OHMS FREQUENCY RG8 TO ANTENNA/PA BALANCED MONO IN PART OF USER SUPPLIED REMOTE CONTROL AC IN FUSE Page 8 Turn-On Checkout Refer to the Table below for the following procedure. Stereo pilot level adjustment With Stereo encoder (optional)connected to composite input, adjust composite gain control to give deviation meter reading shown (aprox 7.5kHz) Page 9 Frequency Selection PLEASE NOTE, FREQUENCY CHANGES SHOULD BE MADE WITH THE UNIT TURNED OFF 10s MHz Switch 0 is 10 (100MHz) 1MHz Switch 100kHz Switch Example Shown 104.5MHz Page 10 FCC Compliance statement THIS DEVICE HAS BEEN VERIFIED TO COMPLY WITH PART 73 OF THE FCC RULES. Accessory connector Pos Function 1 Remote on; Momentary ground to turn the unit on. 2 Remote off; Momentary ground to turn the unit off. 3 Forward Power DC indication 2.4V=12W 4 Reverse Power DC indication 2.4V=1.2W 5 Final Voltage DC indication V=Vsupply/10 6 Final Current 1A=0.1V 7 Raise Ground to Raise Output Power 8 Lower Ground to Lower Output Power 9 10 600 ohms balanced mono input 600 ohms balanced mono input Efficiency V Output Power FM25E Power Output
(W atts) 25.0 22.5 20.0 17.5 15.0 12.5 10.0 FM50E Power Output
(W atts) 50.0 40.0 32.0 25.6 20.5 16.4 13.1 Efficiency
(% ) 52%
49%
47%
46%
44%
42%
33%
FM150E Power Output
(W atts) 150.0 120.0 96.0 76.8 61.4 49.2 39.3 Efficiency
(% ) 48%
42%
38%
33%
30%
26%
23%
Efficiency
(% ) 57%
51%
45%
40%
35%
32%
28%
Page 11 EXCITER SCHEMATIC 15V 4 C 1 C 1 A L R U3 1 VI VO G 3 2 7812 5 C 6 C 2 C 3 C
+12V C2 0.01u C18 C7 0.1u 47u ELNO D2 1N4148 RLA/2 C75 0.1u 8V U2 U1 1 VI VO G 3 2 78L08 1 C4 C3 0.01u 0.01u LM7805 3 VI VO G
+5V U4 7660 2 C5 0.01u C8 4.7u 1 2 3 4 NC
+Vin CAP+
GRN NC NC CAP-
-Vout 8 7 6 5
+12V R8 100 C16 47u
+12V Q1 R11 10K 2N3904
-12V SWITCHING REGULATOR R18 22 Q2 2N3904
+12V R16 560 C21 4.7u R17 10K C23 0.01u MMBV2109LT1 D3 L5 4T0.156 22G D5 MMBV2109LT1 R28 10K C24 10p C32 10p R32 100K R33 100K C43 47u 9 4 C u 1
. 0 VCO C14 0.01u Q3 D G U310 S C36 10p S1 S2 S3 T1 P1 P2
{Value}
R38 22 C42 0.01u R22 22 R36 100 D8 MMBV2109LT1 1K R35 C17 0.01u R24 R25 100 100 R26 100 C40 0.01u R30 10K Q7 BRF96 C41 18p R10 10K R23 47 R21 C38 0.01u 2T0.125 22G C39 68p Q6 BRF96 C22 47u R34 22 L14 1uH D1 1N4148 R15 22 C20 47u R31 4.7K R40 10K U6 93LC56 1 2 3 4 CS CLK DI DO Vcc NC ORG Vss 8 7 6 5 R54 4.7K U8 PIC16C56 RA2 RA3 RA1 RA0 RTCC OSC1 MCLR OSC2 Vss RB0 RB1 RB2 RB3 Vdd RB7 RB6 RB5 RB4 18 17 16 15 14 13 12 11 10
+5V Q8 2N3904 C50 4.7u R51 4.7k R42 100K R43 100K X1 4MHz C51 12p C56 12p 10p C52
+12V R44 270 R45 22 R46 22 C53 10p
+5V R67 100K
+5V R68 100K R60 100 R66 100K C62 4.7u R69 100K ALL THESE DIODES 1N4148 D10 D11 D12 D13 D14 D15 D16 D17 D22 D23 D24 D25 1 2 3 4 1 2 3 4 1 2 3 4 S2:1 S3:1 S7:1 8 7 6 5 8 7 6 5 8 7 6 5 U9 MC145170 OSCin VDD OSCout REFout piV piR fin Din ENB CLK Dout PDout VSS LD fV fR 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 D18 1N4148 R81 1K C55 0.01u R53 100K
+12V 2 3
-
+
4 1 1 U7:A 1 LM324J R49 Q9 10K BRF96 9 5 C L O P N O N u 7
. 4 R61 1M R65 1M R72 100K C64 4.7u R79 1K C67 0.1u LM324J 14 U7:D
+
-
+5V 9 10
-
+
R103 100K R104 100K R57 10K C71 100p C63 4.7u W C W C C R88 W 10K W C W C C R93 W 10K R86 10K R92 10K R95 7.5K R99 C69 0.01u 560 R90 47K
+12V 2 3
-
+
4 1 1 U11:A 1 LM324J
-12V R96 4.2K R102 10K
-12V T2 P1 S1 S2 S3 P2 MOUSER W C W C C R98 W 500 PSU CAP PSU CAP P3:1 P2:9 P2:10 ON OFF REMOTE OFF LED R7 1k
+5V R48 4.7K P8:1 P8:2 P8:3 1 2 3
+5V R64 2.2K Q10 2N3906 R74 10K R75 1M P1:5 P1:6 2 3 DOWN UP DOWN UP P2:3 P2:4 P3 STEREO INPUT SCA INPUT P4 P2:1 MONO INPUT 600 OHMS BALANCED P2:2 MONO INPUT Page 12 1 2 3 4 5 6 7 8 9 2 3 1 9 2 3 EXCITER SCHEMATIC C1 4.7u U4 7660 U12 7660 1
. 0 1 R C8 4.7u 1 2 3 4 NC
+Vin CAP+
GRN NC NC CAP-
-Vout 8 7 6 5 1 2 3 4 NC
+Vin CAP+
GRN NC NC CAP-
-Vout 8 7 6 5 C12 220u C72 4.7u V 2 1
-
C73 220u 47u C74
-12V SWITCHING REGULATOR
+12V C15 0.01u 3 L R12 5.6K C13 1000p L4 R19 220 G 2 2 5 6 1
. 0 T 4 R6 10K R5 100K R3 82K W C C W C R9 10K C9 0.01 W R13 51K 9 10
-
+
U10:C 8 LM324J R21 10 L12 Q4 C33 100p L13 R20 470 C35 0.01 Q5 4T0.235 18G L6 L7 C26 620p L8 L9 L10 L11 1.5T0.175_18g 4T0.175_18g 5T0.2_18g 5T0.235_18g 5T0.235_18g C25 120p C27 43p C28 47p C29 62p 5T0.2_18g C30 47p C31 24p 2T0.125 22G MRF237 C39 68p R37 470 C34 33p 2T0.175_22g MRF171 C45 0.01u R41 1K 5V R39 100K D7 1N4148 C48 C47 0.01u 0.01u 12 13
+
-
LM324J 14 U5:D C46 0.01u DETECTOR DIODE BIAS
& TEMP. COMPESATION
+12V Q2 2N3904
+12V R10 10K R23 47 C38 0.01u Q6 BRF96 L14 1uH R105 FINAL VOLTAGE REAR P2:6 10k R2 3.9k R4 100 R106 10K FINAL VOLTAGE P1:9 FINAL CURRENT P1:8 FINAL CURRENT REARP2:5 REVPWR R73 1K C11 0.01u D4 C19 47p 1N4148 RF OUT C10 0.01u R14 120 C37 47p D6 1N4148 R29 10K R27 120 R77 100 C44 0.01u
+5V 12 13
+
-
U7:C LM324J 8 9 10
-
+
LM324J 14 U7:D
+5V R103 100K R104 100K W W C C W C R47 10K
-12V C58 0.01u D9 1N4148 LM324J U10:D 14 12 13
+
-
R108 10K REVPWR C77 100p R107 3.9K C57 0.1u
+12V 2 3
-
+
4 U5:A 1 1 1 LM324J AGC R55 8.2K C60 100p C76 100p
-12V W C W C C W R58 10K C54 100p R50 10K R56 100K 6 5 9 10
-
+
-
+
C61 100p R71 10K
-12V R57 10K C71 100p 6 5
-
+
U7:B 7 LM324J R91 10K C63 4.7u R80 10K W W C C W C R96 4.2K R94 10K 6 5
-
+
U11:B 7 LM324J C68 4.7u 1 2 D 8 4 1 4 N 1 R97 100K R102 10K
-12V W C 10K W R78 W C C C66 0.01u 5 6
+
-
R83 470 R87 10K D19 1N4148 D20 1N4148 9 10
-
+
U11:C 8 LM324J R100 1K R101 100K C70 4.7u LM324J R82 7 U10:B R84 10K 13 12
-
+
10 R85 10K U11:D 14 LM324J U5:B 7 LM324J AGC IN RANGE DETECTER R52 1k R59 1k DRIVE LOW P1:4 FAULT P1:3 U5:C 8 LM324J R62 470 C65 100p R63 10K
+12V R70 10K REV PWR REAR P2:7 2 3
-
+
4 1 1 U10:A R76 1 LM324J 10 REV PWR METER P1:2
-12V FWD PWR METER P1:1 METERING FWD PWR REAR P2:8 R89 200 W C W C C W 6 P1:7 DEVIATION METER Page 13 WIRING DIAGRAM J3 WHITE 16G N L F2 10A BLACK 16G AC IN AC IN PSU 24V for 25E
-V OUT
+V OUT AC IN AC IN PSU 48V for 150E ONLY 48V OUT TB5 1 2 3 4 5 6 7 8 9 10 P2:1 FWD PWR P2:2 REV PWR P2:3 GND P2:4 REMOTE ON P2:5 REMOTE OFF P2:6 BALANCED AUDIO P2:7 BALANCED AUDIO P2:8 FINAL CURRENT P2:9 FINAL VOLTAGE COMPOSITE J1 P2:10 COMPOSITE P1:1 FWD PWR P1:2 REV PWR P1:3 FAULT P1:4 DRIVE LOW P1:5 5V P1:6 CONTROL VOLTAGE P1:7 DEVIATION P1:8 FINAL CURRENT P1:9 FINAL VOLTAGE P1:10 REMOTE OFF LED P1 P2:1 FWD PWR P2:2 REV PWR P2:3 GND P2:4 REMOTE ON P2:5 REMOTE OFF P2:6 BALANCED AUDIO P2:7 BALANCED AUDIO P2:8 FINAL CURRENT P2:9 FINAL VOLTAGE P2:10 COMPOSITE P2:11 SCA P2 48V P2:11 SCA 150W POWER AMPLIFIER
(USED ON FM150E ONLY) GND SCA J2 GND RF OUT J2 GND Page 14 WIRING DIAGRAM P1:1 FWD PWR P1:2 REV PWR P1:3 FAULT P1:4 DRIVE LOW P1:5 5V P1:6 CONTROL VOLTAGE P1:7 DEVIATION P1:8 FINAL CURRENT P1:9 FINAL VOLTAGE P1:10 REMOTE OFF LED SW1 1 2 3 LED PCB GND GREEN 22G S2 FWD PWR 2 1 REV PWR VOLTS AMPS 3 4 DEV M1 10mA GND R10 10K W FAN1 24VDC GND Page 15 Parts list Chassis Page 16 Parts list Exciter Board Page 17 Parts list Synth Board Page 18 Parts list LED Board Page 19 PTEK 1814 Schooldale Drive San Jose CA 95124 408 448 3342 FAX 408 448 5951 Printed in USA