Atec CBA1G-275 User Manual

CBa 1g-275

80 mhz to 1 ghz 275 Wat t Class a BroadBand amplifier

Designed specically for radiated EMC testing, this mismatch tolerant Class A amplier delivers power continuously into the very poor match typically associated with broadband EMC antennas when used at low frequency.

Since antennas typically exhibit their lowest gain at the lowest frequency, more power is required here than at the higher frequencies. Unlike other ampliers designed for general purpose applications, this EMC specic amplier maximises the linear power at the lowest frequency, making it ideal for use in this very specialised application.

The GaAs Class A design ensures a high reliability, low distortion linear performance across the frequency range. This design also ensures that the amplier will continue to operate at full power even when

Class A linear and low distortion

design

High reliability gallium arsenide

technology

Mismatch tolerant and uncondi-

tionally stable Wide instantaneous bandwidth Typical 2 dB compression data

(as described in IEC 61000-4-3)

provided Harmonics remain below 20 dBc

at actual 1 dB compression point Three year parts and labour

warranty

presented with an open or short circuit at its output. The use of gallium arsenide technology represents a breakthrough in amplier design for this frequency range and output power. Previous designs based on silicon technolog y suffer from relatively poor compression characteristics, low efciency and sometimes poor reliability.

The unit is powered from a switched mode power supply for high efciency, high power factor and wide voltage range operation. The unit is air-cooled with integral fans, and is protected against faulty cooling by excess temperature sensing. A safety interlock connector is provided, which the user can short circuit to ground, to put the amplier into standby mode. Front panel indicators are provided to indicate over-temperature and rf interlock operation.

CBa 1g-275

80 mhz to 1 ghz 275 Wat t Class a BroadBand amplifier

Technical specifications

Frequency range (instantaneous) 80 to 100 0 MHz Rated output power 275 W minimum (350 W typical 80 MHz to 400 MHz) Output power at 1 dB gain compression 250 W minimum (300 W typical 80 MHz to 400 MHz) Gain 56 dB Third order intercept point (see note 1) 64 dBm Gain variation with frequency ±3 dB Harmonics at 250 W output Better than -20 dBc Output impedance 50 Ohms Stability Unconditional Output VSWR tolerance (see note 2) Innite any phase Input VSWR 2:1 RF connector style Type N female Dual safety interlock Two BNC female connectors S/C to mute

and O/C to mute USB interface Optional Supply voltage (single phase) 184 to 264 Vac (Floating input allows operation across 2 phases) Supply frequency range 45 to 63 Hz Supply power <2 kVA (nominal 1.6 kVA) Mains connector IEC320 Conducted and radiated emissions EN61326 Class A Conducted and radiated immunity EN61326: 1997 Table 1 Mains harmonic currents EN61000 -3-2 Voltage uctuations and icker EN61000 -3-3 Safety EN61010-1 Case dimensions 19 inch, 6U case, 550 mm deep Delivered ready for inclusion into a standard rack Mass 25 kg Operating temperature range 0 to 40°C Options (select at time of ordering) 341-850 Rack mountable with front panel mounted input/output connectors 341-950 Rack mountable with rear panel mounted input/output connectors

Teseq AG

Nordstrasse 11F 4542 L uterbach S witzerla nd T + 41 32 681 40 4 0 F + 41 32 681 40 4 8 sales@teseq.c om www.teseq.com

Tes eq

is an ISO-registered company. Its products are designed and manufactured under the strict quality and environmental requirements of the ISO

9001. This document has been ca refully checked. However, Teseq errors or inaccuracies.

does not assume any liability for

Notes:

1. The third order intercept point is a nominal value, as its calculation depends upon the power level at which distortion measurements are made.

2. Output VSWR tolerance is specied for excitation within the permitted levels and frequency range.

691-288A March 2012