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When a Model 1421 or 1422 amplifier is not being
cascaded with other amplifiers, the male output
connector may be inconvenient. For this situation,
New Focus offers a cable assembly with a female K-
connector on one end and a male K-connector on
the other: Model 1227 40-GHz Cable Assembly.

DC-power is supplied to the amplifier via a 3-pin
Microtech connector. This is the same connector
used on the New Focus Model 0901 Power Supply.
Two cables are provided for the power connection.
If the Model 1421 or 1422 is to be used with the
Model 0901, use the Microtech-to-Microtech con-
nector cable only. If the Model 1421 or 1422 is to
be used with a power supply other than the Model
0901, use the Microtech-to-banana cable and
observe the following precautions:

• Input voltage range is 15 to 8 V at 250 mA on the

positive (red) banana plug.

• Input voltage range is -15 to -8 V at 100 mA on

the negative (black) banana plug.

• The negative supply must be turned on first or

simultaneously with the positive supply. If the
positive supply is turned on first, the unit could
be destroyed.

• The two supplies should share a common

ground which should be connected to the green
banana plug.

Содержание 1421

Страница 1: ...Models 1421 and 1422 User s Manual Broadband Amplifiers ...

Страница 2: ...2 Is a registered trademark of New Focus Inc 142101 Rev A ...

Страница 3: ...ecifications 3 4 5 8 Warranty New Focus Inc guarantees its products to be free of defects for one year from the date of shipment This is in lieu of all other guarantees expressed or implied and does not cover inci dental or consequential loss 3 ...

Страница 4: ... use as low noise amplifiers following a high speed photodetector such as the Model Series 14XX and 10XX These amplifiers are specified over a 50 MHz to 20 GHz bandwidth and have good small signal step response as well This makes them suitable for both time and frequency domain applications ...

Страница 5: ...is made by removing the left most screw on the battery cover of a Series 10XX detector or using the hole provided on a Series 14XX detec tor The RF connectors should then be mated but not fully torqued Next use a 1 8 Allen wrench or ball driver to fasten the captive screw to the pho todetector Finally tighten the RF connectors to their proper torque To allow proper alignment of the RF connectors t...

Страница 6: ...n If the Model 1421 or 1422 is to be used with the Model 0901 use the Microtech to Microtech con nector cable only If the Model 1421 or 1422 is to be used with a power supply other than the Model 0901 use the Microtech to banana cable and observe the following precautions Input voltage range is 15 to 8 V at 250 mA on the positive red banana plug Input voltage range is 15 to 8 V at 100 mA on the ne...

Страница 7: ... modules 4 26 109 2 Power Connector 15 V Fastener for use with Model 10XX or 14XX detectors K connector Male Output Connector K connector Female Input Connector 1 51 38 14 3 74 94 8 2 00 50 8 2 00 50 8 Model 10XX or 14XX Detectors Not Included 05 20 GHz Amplifier 1421 7 ...

Страница 8: ... frequency bandwidth For instance the 1421 has a gain that varies from 7 dB to 10 dB In terms of voltage gain this is the variation from 2 2 to 3 2 2 In a 50 Ω system 10 dBm 1 0 V peak 3 The VSWR is the Voltage Standing Wave Ratio It is the ratio between a maximum and a minimum of a standing wave that occurs because of the impedance mismatch A VSWR value of 1 indicates a perfectly matched system F...

Страница 9: ...requency bandwidth For instance the 1421 has a gain that varies from 7 dB to 10 dB In terms of voltage gain this is the variation from 2 2 to 3 2 2 In a 50 Ω system 10 dBm 1 0 V peak 3 The VSWR is the Voltage Standing Wave Ratio It is the ratio between a maximum and a minimum of a standing wave that occurs because of the impedance mismatch A VSWR value of 1 indicates a perfectly matched system For...

Страница 10: ...2 Typical response of the Models 1421 and 1422 amplifiers to a 120 mV 50 ps positive step function input 0 500 0 40 0 00 50 ps div 0 0 1 0 Model 1421 Model 1422 Model 1421 Output Volts Model 1422 Output Volts ...

Страница 11: ...11 Fig 3 Typical frequency response of the Models 1421 and 1422 Amplifiers 0 5 10 15 20 0 4 8 12 16 20 24 Frequency GHz Gain dB Model 1421 Model 1422 ...

Страница 12: ...12 Notes ...

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