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Ptek FM250E Operating Manual And User Manual Download Page 18

5

5

4

4

3

3

2

2

1

1

D

D

C

C

B

B

A

A

NOT USED ON EXCITERS

NOT USED ON EXCITERS

110853

<RevCode>

Schematic PA 300W 88 to 108MHz

B

1

2

Monday, March 08, 2004

Title

Size

Document Number

Rev

Date:

Sheet

of

AGC2

AGC1

AGC1

AGC2

IPARF

IPARF

44V

44V

C43
0.01u

R1
100

PRINTED

Q1 MRF150

R11
100

Q2
MRF150

C36
39p

C8
62p

R12
100

C31 0.01u

R20

470

C12
24p

R21 10k

C14
47p

R6
22

PRINTED

T2

PCB TRFMR

1

5

4

8

C47
1000p

R2
100

L2

C35
15p

C34
15p

PRINTED

R4
100

C15
0.01u

C48
47u

C42
0.01u

D2

1N4148

C6
47p

R22
100k

R5
120

C9
47p

C32 0.01u

L3

C45

0.01u

T1

1

5

6

4

8

C37
39p

C46
33p

C7

1000p

Q3
MRF171

C39
47u

J12

CON20

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

C44
0.01u

C16

0.01u

C10
47p

L1

L4

D1

1N4148

PRINTED

R13
100k

C5

0.01u

C2
0.01u

C33
15p

C38
39p

R7

120

C11
47p

C27
120p

L5

C30 0.01u

R9
100

R3
100

R10
100

44V IN

FWD PWR

RF OUT

REV PWR

RF IN

REV PWR

FWD PWR

Summary of Contents for FM250E

Page 1: ...Operating Manual and User Guide BROADCAST FM EXCITERS FM25E FM50E FM250E FM SERIES PTEK...

Page 2: ...ident 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 p...

Page 3: ...rsonal injury If the excitor is to be energized by any other source be certain the that chassis is connected to a separate safety ground Only fuses with the same required current voltage rating and sp...

Page 4: ...Hz with 75uS de emphasis FM 75 kHz 400Hz Specifications ENVIRONMENT Altitude Ambient Temperature 0 10 000 ft 10 to 50 oC WIDEBAND OPERATION Inputs Input Level Wideband Amplitude Response Composite Unb...

Page 5: ...ER REVERSE POWER ADJ POWER OFF OPERATE REMOTE OFF FAULT DRIVE LOW FM Series PTEK FM25E DEVIATION 30 25 20 15 10 5 OUTPUT POWER W REV X0 1 4 0 40 3 0 30 2 0 20 1 0 10 0 0 AMPS PTEK VOLTS DEVIATION kHz...

Page 6: ...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...

Page 7: ...rical connections are installed at the Exciter rear panel Installation Electrical Page 8 RG8 TO ANTENNA PA PART OF USER SUPPLIED REMOTE CONTROL BALANCED MONO IN OR NOT BOTH FROM STEREO ENCODER OR STL...

Page 8: ...wforthefollowingprocedure Turn On Checkout Page 9 Stereo pilot level adjustment With Stereo encoder optional connected to composite input adjust composite gain control to give deviation meter reading...

Page 9: ...Page 10 Frequency Selection 10s MHz Switch 0 is 10 100MHz PLEASE NOTE FREQUENCY CHANGES SHOULD BE MADE WITH THE UNIT TURNED OFF 100kHz Switch 1MHz Switch Example Shown 104 5MHz...

Page 10: ...turn any power back to the transmitter The ration of Reverse Power to Forward Power in this example 2 5 250 would give a return loss of 1 or 20dB this would classified as a good antenna Reverse Powers...

Page 11: ...2 5 10 0 7 5 PTEK POWER Watts Deviation This is the deviation in kHz caused by the program audio to the carrier The meter is peak reading and will vary in accordance with the program music speech etc...

Page 12: ...Power Output Vs VSWR 0 50 100 150 200 250 300 350 1 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 Antenna VSWR Power Watts Power Output FM250E Power Output FM150E Power Output FM50E Power Output FM25E VSWR E...

Page 13: ...ery 5 years If the frequency offset is greater than 1 5kHz adjustments can be made by tuning C52 see diagram for location Frequency Adjustment A qualified service technician should make adjustments Al...

Page 14: ...d on to the output connecter via a forward and reverse power detector The exciter board also contains control circuitry which levels the output power to a level set by a reference voltage The detected...

Page 15: ...C indication V Vsupply 10 6 Final Current 1A 0 1V 7 Raise Ground to Raise Output Power 8 Lower Ground to Lower Output Power 9 600 ohms balanced mono input 10 600 ohms balanced mono input FM25E FM50E F...

Page 16: ...CA 95124 SAN JOSE 1814 SCHOOLDALE DRIVE PTEK 10 27 2003 A 1 OF 1 C SHEET SCALE REV DWG NO FSCM NO SIZE A B C 4 3 2 1 C B A 1 2 3 4 BLOCK DIAGRAM...

Page 17: ......

Page 18: ...70 C12 24p R21 10k C14 47p R6 22 PRINTED T2 PCB TRFMR 1 5 4 8 C47 1000p R2 100 L2 C35 15p C34 15p PRINTED R4 100 C15 0 01u C48 47u C42 0 01u D2 1N4148 C6 47p R22 100k R5 120 C9 47p C32 0 01u L3 C45 0...

Page 19: ...Title Size Document Number Rev Date Sheet of 0V IN 24V 24V J1 1 2 1 2 R11 10k 1 3 2 MTG2 1 C3 1000p MTG1 1 R10 0 01 R5 2 4k U1A LM324 3 2 1 4 11 R6 2 4k R9 100 R8 4 7k R1 2 4k J2 CON14 1 2 3 4 5 6 7...

Page 20: ...849 A PCB ASSY FRONT PAN METERING A 1 1 Monday March 08 2004 Title Size Document Number Rev Date Sheet of SW1 12 1 2 3 4 5 6 7 8 9 10 11 D1 OUT OF RANGE LO SW2 2 1 3 D2 OUT OF RANGE HI D3 REMOTE OFF J...

Page 21: ...LANCED AC IN LIVE AC IN Neutral AC IN Neutral AC IN LIVE Doc RevCode Title D 1 1 Monday March 08 2004 Title Size Document Number Rev Date Sheet of J1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 D1 1 1 J1 1 2 3 4...

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