Teseq CBA 400M-260 User manual

CBA 400M-260 OPERATING MANUAL 1
OPERATING MANUAL
CBA 400M-260
10kHz to 400MHz 260 watt AMPLIFIER
Aug 2013
2013 Teseq Limited
All Rights Reserved

CBA 400M-260 OPERATING MANUAL 2
WARRANTY
HARDWARE: Teseq Limited (The Company) warrants its amplifiers to be free from defects in
workmanship and materials, under normal use and service, for three years from the date of
purchase from The Company or its Authorised Agent.
If a product does not operate as warranted during the warranty period, The Company shall, at its
option, repair the defective product or part, deliver an equivalent product or part to replace the
defective item, or refund the purchase price paid for the defective product. Transportation of the
defective product or part to the factory or service centre is to be pre-paid by the customer. All
products that are replaced will become the property of The Company. Any replaced or repaired
product or part has a ninety (90) day warranty or the remainder of the initial warranty period,
whichever is longer.
All information in this manual is given in good faith. However, The Company shall not be liable for
any loss or damage whatsoever arising from the use of this manual, the product described in it or
any errors or omissions in either.
Teseq Limited (Milmega/Ametek)
Park Road,
Ryde,
Isle of Wight.
PO33 2BE
UK
TEL: [phone]

CBA 400M-260 OPERATING MANUAL 3
CONTENTS
SAFETY INFORMATION....................................................................................................................4
SECTION 1 INTRODUCTION........................................................................................................5
CBA 400M-260 INTRODUCTION................................................................................................... 5
SECTION 2 UNPACKING AND INSTALLATION..........................................................................6
UNPACKING................................................................................................................................... 6
INSTALLATION .............................................................................................................................. 6
SECTION 3 OPERATION..............................................................................................................7
FRONT PANEL............................................................................................................................... 7
REAR PANEL ................................................................................................................................. 8
SECTION 4 SPECIFICATION........................................................................................................9

CBA 400M-260 OPERATING MANUAL 4
SAFETY INFORMATION

This apparatus has been designed and tested in accordance with BS EN 61010-1, and has been
supplied in a safe condition. This manual contains some information warnings which must be
followed to ensure safe operation, and to retain the apparatus in a safe condition.
This apparatus does not incorporate components liable to explode or implode during normal
operating conditions.
In normal operating conditions this apparatus does not liberate injurious or poisonous gases.
Sound levels of this apparatus after installation in a rack are below 85dBA, as required by
EN61010-1. However local regulations may have a lower limit or the system as a whole may exceed
the local limit. In this case appropriate action should be taken, i.e. of use of any protective
equipment required by local regulations.
This apparatus is of Installation Category 2.
WARNING
This apparatus is capable of delivering harmful levels of radio frequency power.
Ensure at all times during operation that the RF output is properly terminated with
an adequately rated termination or transducer, and that the cables and connectors
attached to the apparatus are in good condition.
The mains plug shall only be inserted in a socket outlet provided with a protective
earth contact. The protective action must not be negated by the use of an
extension cord without a protective conductor.
The opening of covers or removal of parts is likely to expose live parts.
This apparatus must be disconnected from all voltage sources before it is opened
for adjustment, replacement, maintenance or repair.
Make sure that only fuses of the required rated current and of the specified type are
used for replacement. The use of makeshift fuses and the short-circuiting of fuse
holders is prohibited.

CBA 400M-260 OPERATING MANUAL 5
SECTION 1 INTRODUCTION
CBA 400M-260 INTRODUCTION
The CBA 400M-260 is an amplifier capable of supplying 260 watts of RF power into a 50 ohm load
over the frequency range 10kHz to 400MHz, during the course of EMC tests on electrical
equipment. The amplifier is designed with sufficient gain such that it may be used with normal
output levels of signal sources. A safety interlock system on the rear panel is also provided, two
options are available, short circuit or open circuit to mute.
The unit is powered from a switched mode power supply for high efficiency, 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 front panel indicator is provided to indicate over-temperature. The amplifier is designed for rugged
operation into a variety of loads. The amplifier is primarily intended for use as a power source for
EMC susceptibility testing, but is also applicable to other systems requiring a wide-band linear
amplifier.
This amplifier is designated as ‘professional equipment’ and should not be operated by untrained
staff.
As this product has the capability to generate high levels of RF energy it is not intended for use in a
residential environment. Although harmful levels of RF power are not emitted by the amplifier,
poorly screened or matched cables can radiate in use and adequate precautions need to be taken
to mitigate this. This may include the use of double screened cables or locating the amplifier inside
a secondary screened enclosure.
Potential or theoretical hazards
Threat
Precaution
Exposure of personnel to high RF fields
produced by an antenna connected to the output
of the amplifier
Ensure that the antenna is inside a screened
enclosure and fit an interlock to the entry door to
prevent access while the amplifier is operating
RF burns caused by contact with the antenna
connected to the output of the amplifier
Ensure that the antenna is inside a screened
enclosure and fit an interlock to the entry door to
prevent access while the amplifier is operating
Amplifier self oscillation caused by feedback
from un-terminated connectors
This is an unlikely but theoretical possibility.
Always ensure that the amplifier input is
terminated either by the system signal generator
or by a suitable RF load/attenuator before
switching the amplifier on.
Arcing due to high RF voltages present at the
output connector
Always ensure that the output of the amplifier is
terminated either by the system antenna or a
suitable High power RF load or attenuator.

CBA 400M-260 OPERATING MANUAL 6
SECTION 2 UNPACKING AND INSTALLATION
UNPACKING
The CBA 400M-260 package contains:-
10kHz to 400MHz, 260W Amplifier (CBA 400M-260)
16A Power Cable as appropriate:
o(UK)
o(USA / JAPAN)
o(EUROPE)
Spare fuse T 15A H 250V
CBA 400M-260 Operating Manual (this document)
Calibration Report
If any signs of damage are found, no attempt should be made to install the instrument, which should
be returned to Teseq EMC Systems or their agent. If the shipping carton has been damaged, retain
the shipping carton and packing material for the carrier's inspection. Check that the equipment is
complete as in the packing list above.
INSTALLATION
WARNING
This instrument must be earthed.

CBA 400M-260 OPERATING MANUAL 7
SECTION 3 OPERATION
FRONT PANEL
STANDBY/OPERATE SWITCH
Push button toggles between standby and operate modes
POWER INDICATOR
Green:
Flashing green indicates standby mode.
Continuous green indicates operate mode
INTERLOCK INDICATOR
Yellow:
Illuminated if the external interlock (rear panel) has been activated. Amplifier will be in non operating
mode.
FAULT INDICATOR
Red:
Should the amplifier be subject to a failure in the cooling system (either by a fan failure, inadequate
air supply or excess ambient temperature) this indicator will illuminate and the amplifier gain stages
will all be turned off. This action is non-latching, so the gain stages will come on again when the
amplifier has cooled down.
LOCAL LOCKOUT INDICATOR

Yellow:
Illuminated if local lockout has been implemented by external software, Standby/operate button is
disabled.
This indicator is only present on models with the optional USB control interface
RF INPUT (depending on model)
The RF input will accept a signal from an RF generator. This input must be within the operating
frequency range of freq. An amplitude of up to 0dBm will be sufficient to saturate the amplifier.
Operation outside the specified frequency range should not be attempted, and may subject the
amplifier to undue internal stress.
RF OUTPUT (depending on model)
This connector must be suitably terminated at all times during operation. Ensure that the cable and
load are all capable of handling the power available. On no account operate the amplifier without a
proper termination or defective cables or connectors. The centre conductor of the RF output
represents a severe burn hazard to personnel.
AIR INLET
The amplifier depends upon a free air supply for cooling. Ensure that the front air inlet is not
restricted.

CBA 400M-260 OPERATING MANUAL 8
REAR PANEL
MAINS POWER SWITCH
This switch isolates all power from the amplifier, when switched on, the amplifier will power up in
standby mode.
INTERLOCK
Two BNC connectors are provided labelled INTERLOCK and INTERLOCK. In order for the
amplifier to be in operating mode INTERLOCK must be short Circuit and INTERLOCK must be
open Circuit. A short circuit BNC is supplied with the amplifier fitted to the INTERLOCK connector
therefore the amplifier will be in a normal operation condition as delivered.
INPUT/OUTPUT CONNECTORS (depending on model)
The RF input and output connectors may optionally be placed on the rear panel if selected at the
time of ordering.
FAN OUTLET
The amplifier depends upon a free air supply for cooling. Ensure that the fan outlets are not
restricted.
MAINS INPUT
The mains input is an IEC 60320 type. The cable attached to the mains input must be rated at 16A
to ensure proper operation at the minimum line voltage of 85V ac. The fuse-holder is integral with
this mains connector. Use fuse type T 15A H 250V.
INPUT/OUTPUT CONNECTORS (depending on model)
The RF input and output connectors may optionally be placed on the rear panel.

CBA 400M-260 OPERATING MANUAL 9
SECTION 4 SPECIFICATION
The following specification applies over the operational temperature and frequency range unless
otherwise stated, and does not include the characteristics of connecting cables.
Frequency Range (instantaneous) 10kHz-400MHz
Rated Output Power 260W minimum
Output Power at 1dB Gain Compression 210W minimum
Gain 54dB
Third Order Intercept Point 64dBm
Gain Variation with Frequency ±3dB
Harmonics at 100W Output Power Better than -20dBc
Output Impedance 50 Ohms
Stability Unconditional
Output VSWR Tolerance Infinity:1
Input VSWR 2:1
RF Connector Style Type N female
Safety Interlock BNC female
USB Interface Optional
EMC and Safety
Conducted and Radiated Emissions EN61326 Class A
Conducted and radiated immunity EN61326: 1997 Table 1
Mains harmonic currents EN61000-3-2
Voltage fluctuations and flicker EN61000-3-3
Safety EN61010-1
Power
Supply Voltage (single Phase) 100-240V ac (+/-10%)
Supply Frequency Range 47-63 Hz
Supply Power <2 kVA
Mains Connector IEC320
Environmental
Operating Temperature Range 0-40°C
Mechanical
Case Dimensions 19 inch, 6U case, 550mm deep
Weight 30 kg
Options (selected at time of ordering)
341-832 Rack mountable with front panel mounted input/output connectors
341-932 Rack mountable with rear panel mounted input/output connectors
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 specified for excitation within the permitted levels and frequency range.