Com-Power PAM-103 User manual

Page 1 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 60 0 ● com-power.com
REV012017
INSTRUCTION MANUAL
For
RF Preamplifier
Model PAM-103
1 MHz to 1000 MHz, 33 dB Gain (typical)

Page 2 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 60 0 ● com-power.com
REV012017
Table of Contents
1.0 Introduction.............................................................................................................. 3
2. 0 Product Specifications .............................................................................................. 4
2.1 Other related equipment available from Com-Power............................................... 4
2.2 Other RF and Microwave preamplifier models available from Com-Power............... 4
3. 0 Important Precautions.............................................................................................. 5
3.1 Excessive RF input .........................................................................................................5
3.2 Saturation.......................................................................................................................5
3.3 Calibration......................................................................................................................5
4.0 Warranty ................................................................................................................... 6
4.1 Maintenance ................................................................................................................. 6
5.0 Application and product operation .......................................................................... 7
5.1 Application.....................................................................................................................7
5.2 Items included with the preamplifier ..........................................................................7
5.3 Front and rear panel layout description..................................................................... 8
5.3.1 Front Panel .................................................................................................................................... 8
5.3.2 Rear Panel ..................................................................................................................................... 8
5.4 Battery Replacement and troubleshooting tips ............................................................... 9
5.5 Troubleshooting Common problems................................................................................. 9
6.0 Typical Preamplifier Gain.........................................................................................10

Page 3 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 6 0 0 ● com-power.com
REV012017
1.0 Introduction
This manual includes product specifications, safety precautions, product maintenance and
warranty information.
Information contained in this manual is the property of Com-Power Corporation. It is issued
with the understanding that none of the material may be reproduced or copied without
permission from Com-Power.

Page 4 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 6 0 0 ● com-power.com
REV012017
2. 0 Product Specifications
Model:
PAM-103
Electrical
Frequency Range
1 MHz to 1 GHz
Preamplifier Gain
33 dB (±3 dB)
Linear RF Input Range
< -30 dBμV to 89 dBμV
POUT @ 1 dB Compression
18.3 dBm
POUT @ 3 dB Intercept (IP3)
32 dBm
Noise Figure
< 3.3 dB
Input Sensitivity
< -30 dBμV (< 31.6 nV)
VSWR (RF Input/Output Ports)
1.69:1 (maximum), 1.25:1 (average)
Return Loss (RF Input/Output Ports)
29.5 dB (minimum), 44 dB (average)
RF Connectors (Input/Output Ports)
50Ω N-Type (female)
Reverse Isolation
>40 dB (output port to input port)
Absolute Max. RF Input Ratings
107 dBμV (225 mV), 0 dBm (1 mW), 2 VDC
Battery Runtime
>13 Hours (with new, fully-charged batteries)
Power Input
15 VDC, 500 mA (unregulated)
Operating Temperature Range
0º to 40º C (32º to 104º F)
Mechanical
Dimensions (Height x Width x Depth)
2.3” x 6.6” x 8.3” (6 cm x 16.7 cm x 21 cm)
Weight
3.2 lbs (1.45 kg)
This equipment is designed for indoor use only.
2.1 Other related equipment available from Com-Power.
PS-400 or PS-500 Near Field Probe Kits
AL-100 / ALP-100 / ALC-100 Log Periodic antennas
AB-900 / ABF-900 Biconical Antennas
AC-220 Combilog Antenna
2.2 Other RF and Microwave preamplifier models available from Com-Power
Model
Specifications
PAL-010
100 Hz to30 MHz, 28 dB
PAM-6000
1 to 6 GHz, 30 dB
PAM-118
1 to 18 GHz, 25 dB
PAM-118A
1 to 18 GHz, 40 dB
PAM-840
18 GHz to 40 GHz, 25 dB

Page 5 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 6 0 0 ● com-power.com
REV012017
3. 0 Important Precautions
Observe the following safety precautions to ensure user safety and maximizing the operating life
of the preamplifier.
Remove the batteries from the preamplifier when it is not used for an extended period.
Use only the battery charger adapter supplied with the preamplifier.
Replace fuse with same type and size.
Replace only with batteries supplied by Com-Power.
Exercise caution when handling the preamplifier because it is sensitive electrostatic
discharge.
Avoid using the preamplifier in environments with excessive heat or moisture.
The only user replaceable part in the preamplifier is the battery pack. It can be accessed from
the bottom of the unit. There are no other user serviceable parts inside the unit. Do not remove
the main instrument cover. If the preamplifier needs repair please contact authorized Com-
Power service center.
3.1 Excessive RF input
Do not exceed RF input level indicated on front panel. Excessive RF input may damage the
preamplifier’s sensitive input and will not be covered under warranty.
3.2 Saturation
In addition possible damage to the preamplifier input, excessive RF signals may cause the
preamplifier to saturate. When a preamplifier reaches saturation point the gain will reduce
and cause a nonlinear increase in output power resulting inaccurate measurements. Please
check product specification for saturation level.
3.3Calibration
The factory recommended calibration period for the Preamplifier is 12 months. However, its
performance should be checked periodically to ensure the preamplifier is operating within the
rated specification given in section 2.0 of this manual.

Page 6 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 6 0 0 ● com-power.com
REV012017
4.0 Warranty
Com-Power warrants to its Customers that the products it manufactures will be free from
defects in materials and workmanship for a period of 3 years. This warranty shall not apply to:
Transport damages during shipment from your plant.
Damages due to poor packaging.
Products operated outside their specifications.
Products Improperly maintained or modified.
Consumable items such as fuses, power cords, cables, etc.
Normal wear
Calibration
Products shipped outside the United States without the prior knowlege of Com-
Power.
In addition, Com-Power shall not be obliged to provide service under this warranty to repair
damage resulting from attempts to install, repair, service or modify the instrument by
personnel other than Com-Power service representatives.
Under no circumstances does Com-Power recognize or assume liability for any loss, damage
or expense arising, either directly or indirectly, from the use or handling of this product, or
any inability to use this product seperately or in combination with any other equipment.
When requesting warranty, calibration or repair services, it is recommended that the original
packaging material be used for shipping. Damage due to improper packaging will void
warranty.
In the case of repair or complaint, a label should be attached to the housing of the
instrument which describes briefly the faults observed. Please include the name, telephone
number and email address of the contact person. Please visit our website www.com-
power.com and obtain an RMA number by selecting service and completing the online form.
4.1 Maintenance
This product contains no user replaceable parts other than the battery. If the unit does not
operate or needs calibration, please contact Com-Power Corporation. Do not remove the
instrument cover. The batteries can be accessed from the the bottom of the unit if needs
replacement. Any modifications or repairs performed on the unit by anyone other than an
authorized factory trained technician will void warranty.
The exterior surface may be cleaned with mild detergent and then be wiped with a dry, clean,
lint-free cloth. Use care to avoid any liquids or foreign objects entering the chassis.

Page 7 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 6 0 0 ● com-power.com
REV012017
5.0 Application and product operation
5.1 Application
Com-Power PAM-103 Preamplifer are designed specifically for EMI radiated emissions testing
up to 1 GHz.
The PAM-103 high gain of the preamplifier
•Amplifies signals within its operational frequency band to improve the overall
signal noise ratio of the measurement system.
•Compensates for signal losses associated with the use of cables and antennas
operating within its frequency range.
•Increases sensitivity of near field probes.
5.2 Items included with the preamplifier
The following accessories and documents are supplied with the Model PAM-840A Preamplifier:
Battery Charger / Power Adapter
Instruction Manual
Calibration data with certificate traceable to NIST
Two (Pre-installed) rechargeable battery packs
Optional items
ISO-17025 calibration data and certificate
Spare battery packs
Spare fuses

Page 8 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 6 0 0 ● com-power.com
REV012017
5.3 Front and rear panel layout description
5.3.1 Front Panel
The simple panel shown in the photo below consists of BNC or N type connector for RF input
and output, power switch with LED indicator and battery low indicator. Please observe the
maximum input rating printed on front panel. When the battery low indicator turns on, the
preamplifier needs charging. For faster charging, turn off preamplifier and plug in the supplied
charging adapter. You can continue using the preamplifier powered by battery charger adapter.
If the low battery indicator will remain lit, it can be turned off by flipping the power switch off
and then on.
5.3.2 Rear Panel
The back panel shown below consists of fuse holder and charging adapter input socket. Make
sure to use only the charger adapter supplied by Com-Power to power and charge the
preamplifier. Please note input rating and polarity noted above the power socket. Replace fuse
with similar size, type and rating. Please heed the warning on the back panel. Damage caused to
the preamplifier by using an alternate adapter or wrong fuse will void warranty.

Page 9 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 6 0 0 ● com-power.com
REV012017
5.4 Battery Replacement and troubleshooting tips
The replaceable battery pack can be accessed from the bottom of the preamplifier. Four screws
secure the cover to the battery compartment. Please charge the new batteries overnight initially
to maximize operating time of the preamplifier.
5.5 Troubleshooting Common problems
Problem: Gain is low or no gain.
A: Make sure the power switch is on and the green is LED is lit.
Check if the input and output cables are connected securely. Wiggle both cables and verify if the
signal level changes on the receiver. If the signal changes replace the defective cable and check
again. Make sure the cable from the signal source is connected to the input not the output.
Verify if the signal source connected. If it is a signal generator make sure the RF is turned on.
Inject a known signal level into the preamplifier and check the gain. For example if you inject 50
dBµV, you should read ~ 81 to 83 dBµV on the receiver. Please be cautious not to exceed the
input limits given in specification table of this manual.
Make sure the battery is fully charged or the adapter is plugged into a AC power source.
Problem: Battery low indicator remains lit even after charging overnight.
A: The battery may need to be replaced. However, before you replace the battery perform the
following steps
Make sure the battery terminals are connected to the preamplifier
Check the fuse on the back panel. If the fuse is blown, replace it. Please heed
the warning label on the bottom of the fuse holder and rear panel.
Check the charging adapter to make sure it is supplying the rated voltage on the
adapter. If the charging adapter is producing the proper voltage, the batteries
may have to be replaced. Otherwise replace the charger adapter.

Page 10 of 10
INSTRUCTION MANUAL
Preamplifier Model PAM-103
1 9 1 2 1 E l T o r o R d ● S i l v e r a d o , C a l i f o r n i a 9 2 6 7 6 ● ( 9 4 9 ) 4 5 9 - 9 6 0 0 ● com-power.com
REV012017
6.0 Typical Preamplifier Gain
0
10
20
30
40
50
0 200 400 600 800 1000
Preamplifier Gain (dB)
Frequency (MHz)