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®
160 School House Road, Souderton, PA 18964-9990 USA
Phone 215-723-8181•FAX 215-723-5688
The Model 1000L is an economical, self-contained, air-cooled broadband amplifier designed for
laboratory applications that require instantaneous bandwidth, high gain and high power output. Housed
in a stylish contemporary enclosure, the Model 1000L is smaller than competitive units with similar
power levels. All operating controls are functionally grouped on the front panel for simplicity of
operation. These include modern, lighted push-button switches for the command functions, POWER,
STANDBY, OPERATE and PULSE, a control for setting the output level of the amplifier, and a meter
for monitoring critical operating voltages and currents. Remote control is provided through a rear panel
mounted connector. Isolated TTL level remote control can be accomplished using our CP2001
interface. Isolated IEEE-488 compatible control can be provided with our CP3000. A highly versatile
unit, the Model 1000L features rugged circuitry and a quick-acting, solid state crowbar circuit to
protect the final amplifier tubes from damage due to internal arcing. An electronic circuit is provided
to enable rapid gating or blanking of the amplifier.
3500
3000
2500
2000
1500
1000
500
0
0.001
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
1000L TYPICAL POWER OUTPUT
PULSE
CW
LINEAR @ 1dB COMPRESSION
0.01
0.1
FREQUENCY (MHz)
1
10
MODEL 1000L
1200 WATTS CW
2500 WATTS PULSE
10kHz-220 MHz
100
1000
REV060396

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Summary of Contents for Amplifier Research 1000L

  • Page 1 Housed in a stylish contemporary enclosure, the Model 1000L is smaller than competitive units with similar power levels. All operating controls are functionally grouped on the front panel for simplicity of operation.
  • Page 2 SPECIFICATIONS Model 1000L POWER OUTPUT High Range Pulse Minimum ..............2500 watts to 150MHz 1750 watts to 220MHz Duty Cycle ..............15% Pulse Width............... 8 milliseconds Minimum ..............1200 watts Low Range ............... 100 watts nominal FLATNESS, high range ........... ± ± 1.5 dB FREQUENCY RESPONSE..........
  • Page 3: Table Of Contents

    Low or No Power Output (DC Tests) .........4-5 4.3.7 Low or No Power Output (RF Tests)..........4-6 Lo/No RF Output..............4-7 Frequency Discriminator ............4-7 DC to 0.5MHz Amplifier Research ..........4-7 SECTION V: REPLACEABLE PARTS Introduction ................5-1 Ordering Information ..............5-1 Non-Listed Parts ...............5-1...
  • Page 4 Model 10WD1000 Manual Text SECTION V: REPLACEABLE PARTS ( CONTINUED Circuit Designators ....................5-1 Manufacturers’ Abbreviation Listing ...........5-2 Master List ................5-3 Schematics and Bills of Material (BOMs) ........5-3 A: S ....A-1 PPENDIX TANDARD BBREVIATIONS FOR ANUFACTURERS SECTION VI: RECOMMENDED SPARE PARTS Level of Maintenance ..............6-1 ARRANTIES IMITATION OF...
  • Page 5: General Information

    AC input voltage. The unit’s AC power consumption is 350 watts nominal. A built-in circuit breaker provides primary AC circuit protection. PECIFICATIONS Refer to the “Amplifier Research Data Sheet” on the following pages for detailed specifications. All voltage measurements referenced in this manual are Direct Current (DC) unless stated otherwise. REV -...
  • Page 6: Operating Instructions

    Model 10WD1000 Manual Text SECTION II OPERATING INSTRUCTIONS ENERAL Operation of the Model 10WD1000 broadband RF amplifier is simple. The amplifier’s input signal, whether swept or fixed in frequency, is fed into the jack labeled INPUT, and the amplifier’s output signal is taken from the jack labeled RF OUTPUT.
  • Page 7: Model 10Wd1000 Front Panel

    Model 10WD1000 Manual Text MPLIFIER PERATION Figure 2-1 shows the front panel of the Model 10WD1000 broadband RF amplifier. Model 10WD1000 10 Watts 1-1000MHz 0-0.5 0.5-1000 RF OUTPUT RF INPUT POWER FAULT AUTO REMOTE HAZARDOUS VOLTAGE RESET Figure 2-1 Model 10WD1000 Front Panel Figure 2-2 shows the rear panel of the Model 10WD1000 broadband RF amplifier.
  • Page 8: Amplifier Operation

    Model 10WD1000 Manual Text 2.2 A MPLIFIER PERATION CONTINUED 2.2.1 Local Operation Power-up Sequence: 1. Connect the input signal to the unit’s RF INPUT connector. The input signal level should be 0dBm maximum. 2. Connect the load to the unit’s RF OUTPUT connector. 3.
  • Page 9: 2.2.2.4.2 Ieee-488 Device Address Selection

    Model 10WD1000 Manual Text 2.2.2.2 Selecting Remote Operation The Model 10WD1000 can be placed in the remote operation mode at any time by switching the FUNCTION switch on the front panel to the REMOTE position. In this mode, control is transferred to the selected remote interface and all front panel controls are inoperative with the exception of the FUNCTION switch.
  • Page 10 Model 10WD1000 Manual Text 2.2.2 Remote Operation (continued) 2.2.2.4.2 IEEE-488 device address selection (continued) Table 2-1 IEEE-488 Device Address Selection Device Address Switch 5 Switch 4 Switch 3 Switch 2 Switch 1 off (0) off (0) off (0) off (0) on (1) off (0) off (0)
  • Page 11: Remote Error Codes/Messages

    Model 10WD1000 Manual Text 2.2.2 Remote Operation (continued) 2.2.2.6 IEEE-488 Communications (continued) Table 2-2 Remote Error Codes/Messages IEEE-488 Serial Poll Model 25W1000B Error Condition RS-232 Response (STB) Error (binary/decimal) Message (01000001) 65 INTERLOCK FAULT (01000010) 66 THERMAL FAULT (01000011) 67 POSITIVE 20 VOLT FAULT (01000100) 68 POSITIVE 60 VOLT FAULT...
  • Page 12: Rs-232 Connector Pin-Outs

    Model 10WD1000 Manual Text 2.2.2 Remote Operation (continued) 2.2.2.7 RS-232 Communications (continued) Table 2-3 RS-232 Connector Pin-Outs Pin No. Signal Data Direction* Description < Device Carrier Detect < Receive Data > Transmit Data > Data Terminal Ready Ground No Connection >...
  • Page 13 Model 10WD1000 Manual Text 2.2.2 Remote Operation (continued) 2.2.2.8 Remote Commands (continued) 2.2.2.8.1 Power On/Off Controls the power on/off state of the Model 10WD1000. Syntax: Px Parameters: 0 = power off 1 = power on Example: To turn the power on, send the following command: P1<LF>...
  • Page 14: Introduction

    Model 10WD1000 Manual Text INTRODUCTION The Model 10WD1000 Amplifier consists of a DC to 0.5MHz and a 0.5MHz to 1000MHz Amplifier and a frequency discriminator on the heatsink, two power supplies and a operate/control circuit are located on the bottom side of the unit. The RF input signal is connected from the front panel of the 10WD1000 to the input of the Frequency Discriminator.
  • Page 15: To 1000Mhz Amplifier

    Model 10WD1000 Manual Text The DC to 0.5MHz module is a direct coupled amplifier capable of 10 watts saturated power. The amplifier operated class B with a quiescent current of approximately 150ma. Current feedback is used to provide wide amplifier bandwidth. Positive and negative 60 volt power supplies allow for direct coupling throughout the amplifier.
  • Page 16: Power Supply

    Model 10WD1000 Manual Text maintain constant collector currents. Q3 is set to 0.9 amps per side, Q4 is set to 1.5 amps per side. The output of Q4 is fed to RF relay K3 which is connected to the RF output connectors on the front panel. The RF amplifier stages A4, A5, A6 and A7, Schematic Number 1006773 are push-pull gain stages .Transformer T1 is a phase splitter providing signals of the correct phase to the inputs of Q2.
  • Page 17: Maintenance

    Small bias changes may cause excessive dissipation or transients that could ruin the amplifier. All components utilized in Amplifier Research instruments are conservatively operated to ensure maximum instrument reliability. Despite this, parts within an instrument may fail. In most cases, the instrument may be repaired immediately with a minimum of “down time.”...
  • Page 18: Troubleshooting

    Model 10WD1000 Manual Text Troubleshooting Troubleshooting the Model 10WD1000 in a logical manner can speed the solution to a problem. The settings of potentiometers (“pots”), capacitors (“caps”), or other variables should not be disturbed until other problems have been eliminated. Comparing the measured DC voltages to those shown on the schematics can solve many problems.
  • Page 19: Unit Cannot Be Operated Remotely

    The amplifier should change state every time the POWER switch is depressed. 4.3.1.7 If all voltages are correct and the unit still does not operate, contact Amplifier Research to arrange for repair or replacement of the A4 Operate/Control Board. 4.3.2 The Unit Cannot be Operated Remotely 4.3.2.1...
  • Page 20: Voltage/Amplifier Faults

    If all of the above voltages are correct and the unit still will not reset, check for defective wiring and/or PWB connections, then try the RESET switch again. If the unit still will not reset, the A4 Operate/Control Board is defective. Contact Amplifier Research to arrange for repair or replacement of the A4 Operate/Control Board.
  • Page 21 Board to the A5 Interface Board. If the high signal to the A4 Operate/Control Board is present but the fault cannot be cleared, and the amplifier cannot be reset, then the A4 Operate/Control Board is defective. Contact Amplifier Research to arrange for repair or replacement of the A4 Operate/Control Board.
  • Page 22 Model 10WD1000 Manual Text 4.3.7 Low or No Power Output (RF Test) (Schematic Diagram No. 1009777) 4.3.7 Low or No Power Output (RF Test) (Schematic Diagram No. 1009379) (continued) If the RF gain is appreciably lower than it should be, remove the covers from A1A1 and A2A2. Inspect the amplifier stages for defective solder joints and burned or broken parts.
  • Page 23: Frequency Discriminator

    Model 10WD1000 Manual Text 4.4.1 Check the operation of the Frequency Discriminator board. Is the RF relay (K1) switching to the correct output ? The RF insertion loss from J1 to J2 or J3 should be approximately 3dB. Try switching the bands manually with the front panel Band Select switch, does it function properly ? 4.4.2 After checking the Frequency Discriminator operation, check the output from the DC to 0.5MHz or the...
  • Page 24 Model 10WD1000 Manual Text The first step in troubleshooting should be a visual inspection. Because of the voltage and currents involved when a failure does occur, it often results in indications such as discolored or burned resistors. A burned resistor is usually an indication that the transistor associated with it has failed. This can usually be verified with an ohmmeter, Failures in the low level stages are often secondary to failure of the output devices, therefore all transistors on the side that shows damage should be checked.

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