PM-6000 Manual 900-000002-006 RevB
Contents
1. Introduction to the PM 6000 The PM 6000 is a handheld broadband power meter capable of de tecting forward and reflected power in a microwave radio system The meter is capable of detecting various types of wireless broad band modulation schemes in multiple frequency bands The meter was designed with the system integrator and installer in mind It is the perfect tool for the verification of transmitter power transmission line loss characteristics and antenna performance Key features of the PM 6000 e affordability portability use in the microwave bands 2 4 3 5 4 9 5 3 5 5 5 7 5 8 6 0 6 2 6 3 6 6 6 7 and 6 8 GHz verification of system installation CT ia S GORMAN 2005 Page 1 PRAXSYM Using the PM 6000 The PM 6000 ships with a durable nylon case that is secured with hook and loop flaps The package is designed so that the meter can be used while still in the nylon case The flaps that cover and protect the meter can be secured behind the unit while it is in use This is shown on the front cover of this manual Packaged with the meter is a male to male type N adapter in the left pocket a 50 2 termination right pocket and a 5 W 10 dB attenu ator in the pocket above the meter RI LS CR OKSER DOT TER ER 25056250 425052 Q 279 ER RAI 26 6900009050090 00 KI ROSA 5 W 10 dB attenuator Most transmitters have a fe2. 0 005 0 0002 404 001 1 02 0 0005 1 03 366 0022 0 0011 104 341 004 00018 15 323 006 0 0028 107 294 0116 0 0051 108 283 0144 0 0066 1 15 23 1 0488 0 0205 0615 006 is ne 062 0 0285 __ 212 025 129 179 16 0068 wa im 008 132 172 191 008 13 PRAXSYM Return Loss Reflected Transmiss VSWR dB Power Loss dB PM 6000 Notes Page 15 PRAXSYM Notes Page 16 PRAXSYM 070110 RevB P N 900 000002 006
3. power and VSWR A right pointing arrow in the upper right of the display indicates the meter is measuring forward power The power measurement is displayed continu ously The VSWR is displayed for two seconds on the bottom display line and then is replaced for one second by the band indicator 2 4G 3 5G 4 9G 5 3G 5 54 5 7G 5 8G 6 0G 6 2G 6 3G 6 6G 6 7G 6 8G and the in line attenuator setting 00 attn 10 attn 20 or 30 REFL Similar in function to the FWD button except it displays the reflected power and shows a left pointing arrow in the upper right of the display PM 6000 Measuring Transmitter Power The meter should be connected to the transmitter according to the FORWARD SIGNAL label on the meter see the illustration on the opposite page Depending on the gender of the type N connector on the transmitter it may be necessary to use the double male type adapter The meter should be terminated with the 50 load in cluded in the kit Turn the PM 6000 on by pressing the ON OFF button Select the fre quency band of interest by pressing the MODE button until the fre quency list is shown Use the SELECT button to scroll through and select the appropriate band A small arrow will be displayed beside the selected band Press the FWD button to read the forward power A small right pointing arrow will appear in the upper right s
4. ide of the display This is the amplitude of the signal in dBm or mW depending on the unit selected in the MODE menu in the forward direction The meter is designed to detect signals between 0 and 20 dBm in the forward direction and 20 to 17 dBm in the reflected Damage can occur to the meter if the forward power into the meter without the attenuator exceeds 33 dBm Most broadband radio transmitters deliver less than 100 mW 20 dBm The 5 W 10 dB attenuator can be used for sources that are between 20 and 30 dBm in amplitude Remember to apply the ap propriate offset in the MODE setting 10 attn if the attenuator in cluded in the Kit is used If the output of the transmitter exceeds 33 dBm 2 W an attenuator of the appropriate power rating and inser tion loss should be used to lower the signal to a level below 20 dBm Using the MODE button an offset can be configured for attenuators up to 30 dB If an attenuator is not used the offset should be set to 00 attn While the forward power is displayed constantly on the top line of the display the bottom line alternates between the VSWR and the frequency band and offset settings NOTE A good way to verify proper operation of the 50 termination included in the kit is to make sure that a VSWR of 1 3 1 or1 5 1 for 6 GHz ranges is displayed when the meter is connected according to the diagram on the opposite page If the VSWR is not 1 3 1 the termi nation should be
5. inline attenuator 20 dBm to 43 dBm 20 GB inline attenuator 30 dBm to 53 dBm 30 GB inline attenuator Reflected Power Measurement Range 2 4 3 5 4 9 5 3 5 5 5 7 and 5 8 GHz bands 20 dBm to 17 dBm no inline attenuation 10 dBm to 27 dBm 10 dB inline attenuator 0 dBm 37 dBm 20 dB inline attenuator 10 dBm to 47 dBm 30 dB inline attenuator 6 0 6 2 6 3 6 6 6 7 and 6 8 GHz bands 17 dBm to 20 dBm no inline attenuation 7 Bm to 30 dBm 10 GB inline attenuator 3 dBm to 40 dBm 20 GB inline attenuator 13 dBm to 50dBm 30 GB inline attenuator Power Measurement Accuracy 0 5 dBm with a 1 2 1 LOAD Page 11 PRAXSYM Insertion Loss 0 4 dB 2 4 GHz 0 75 dB 5 8 GHz VSW R Measurement Range 2 4 3 5 4 9 5 3 5 5 5 7 and 5 8 GHz bands 1 2 1 to 6 0 1 6 0 6 2 6 3 6 6 6 7 and 6 8 GHz bands 1 5 1 to 6 0 1 Environmental Specifications Temperature Range 10 to 50 C Humidity 0 to 95 RH non condensing Altitude 0 to 15 000 feet Mechanical Specifications RF Connectors Type female input output Display 2 lines by 8 characters LCD not illuminated Keypad Five keys see definition on page 3 Enclosure Black ABS Power Source 2 AA alkaline batteries industrial grade Size 4 9 x 2 7 inches excluding N connectors Weight 10 ounces Page 12 PM 6000 Appendix VSWR Table Return Loss Reflected Transmiss VSWR dB Power Loss dB 461
6. line loss may mask any reflections further down the transmission line or at the far end terminations i e make the VSWR look better than it really is The problem becomes more pronounced as the two way loss of the transmission line ap proaches the dynamic range of the meter which is 20 dB Therefore it is best to have as little transmission line loss as possible when at tempting to measure return loss or VSWR of a termination with the meter A VSWR vs return loss table is included in the Appendix NOTE Reflections are usually due to bad terminations kinks in the transmission line bend radii which are too tight or moisture in the line or connectors Page 9 Return loss is simply the forward power minus the reflected power PRAXSYM Wi 10 PM 6000 Electrical Specifications Frequency Range 2 4G 2400 2484 MHz 3 5G 3400 3700 MHz 4 9G 4940 4990 MHz 5 3G 5250 5350 MHz 5 5G 5470 5598 MHz 5 7G 5598 5735 MHz 5 8G 5725 5850 MHz 6 0G 5925 6095 MHz 6 28 6095 6260 MHz 6 3G 6260 6425 MHz 6 6G 6526 6650 MHz 6 7G 6650 6775 MHz 6 8G 6775 6875 MHz Forward Power Measurement Range 2 4 3 5 4 9 5 3 5 5 5 7 and 5 8 GHz bands 0 dBm to 20 dBm no inline attenuation 10 dBm to 30 dBm 10 dB inline attenuator 20 dBm to 40 dBm 20 dB inline attenuator 30 dBm to 50 dBm 30 dB inline attenuator 6 0 6 2 6 3 6 6 6 7 and 6 8 GHz bands O dBm to 23 dBm no inline attenuation 10 dBm to 33 dBm 10 GB
7. male type N output connector The dou ble male adapter can be used to connect the meter directly to the transmitter The meter should always have a 50 Q load on its output when connected to a transmitter Depending on the type of test this can be an antenna or the 50 termination included in the kit The 10 dB attenuator is included for use when the device under test transmits a signal higher than 20 dBm in amplitude When using the 10 dB at tenuator it is a good idea to change the offset to 10 attn in the MODE settings Note that the input to the 10 dB attenuator should not exceed 33 dBm 2 W If an attenuator with a higher power rating is used the input into the attenuator can be increased such that the output of the attenuator does not exceed 23 dBm The attenuator offset should be set for 00 attn when no attenuator is used The meter should always be inserted into the system in the forward Page 2 PM 6000 power direction Use the arrow labeled FORWARD SIGNAL as a guide when connecting the meter Pressing and quickly releasing the ON OFF button turns the meter on The meter will display a less than sign lt along with the lowest signal level the meter can measure in the selected band if it is not connected to a source that is within the meter s dynamic range The meter s set up information will also be displayed Once the meter is connected to a source and a 500 termination is placed on the meter s outp
8. replaced Page 5 PRAXSYM gO PUNTOS 6 PM 6000 Measuring Transmission Line Loss Measure the forward power of the transmitter as shown on the previ ous pages Use the 50 Q termination included in the kit as the load Make note of the forward power reading Disconnect the meter from the transmitter NOTE The transmitter should always be powered down when there is no load present or when connecting the meter or transmission line Connect the trans mission line directly to the transmitter with the proper amount of attenuation if necessary Move the PM 6000 to the opposite end of the transmission line Con nect the meter as shown on the opposite page Take another for ward power reading Subtract this forward power reading from that taken directly off the back of the transmitter This is the amount of signal lost due to attenuation in the transmission line and termina tions This value can be compared to the loss specifications of the transmis sion line and connectors to verify that the coax is properly termi nated Page 7 PRAXSYM 2 592 renavo sani 9 Page 8 PM 6000 Measuring VSWR of Antenna and Termina tions To measure the VSWR of an antenna place the meter into the system between the transmission line and the antenna Use the FORWARD SIGNAL arrow on the meter to orient the meter properly The arrow will point towards the antenna when it is properly inserted The do
9. t metez PRAYSYMI use PRACTICAL SYSTEMS ENGINEERING VSWR Meter PM 6000 User s Manual aa Sa PM 6000 Warranty concerns or claims should be pursued with the company from which the product was purchased PRAXSYM warrants that all items will be free from defects in material and workmanship under use as specified in this guide for a period of one year from date of delivery PRAXSYM further agrees to repair or replace at its discretion any failure which upon PRAXSYM s inspec tion appears to be a result of workmanship or material defect In no case shall PRAXSYM s liability for breach of warranty exceed the pur chase price of the items in question PRAXSYM s liability on any claim of any kind for any loss connected with or resulting from the use of performance or breach thereof installation inspection operation or use of any equipment furnished by PRAXSYM shall in no case exceed the purchase price of the goods which give rise to the claim Illustrations by Mike Gorman Prairie Wind Communications Inc Phone 303 470 6367 Email mgdcabler comcast net Copyright 2004 Castle Rock Microwave LLC Page i PRAXSYM TABLE OF CONTENTS Introduction to the PM 6000 1 Using the PM 6000 2 Measuring Transmitter Power 5 Measuring Transmission Line Loss 7 Measuring VSWR of Antenna and Terminations 9 Specifications 11 Appendix VSWR Table 13 Appendix Notes 15 Page ii PM 6000
10. u ble male type N adapter can be used if the antenna has a female type N connector Apply power to the transmitting device The meter will display the VSWR if the transmitter power is within the dynamic range of the meter for the selected band If the transmit power of the radio minus the transmission line loss is below range the meter will display a less than sign lt along with the lowest level the meter can measure Likewise if the power at the meter is above its measurement range the meter will display a great than sign gt along with the highest level the meter can measure The best return loss that the meter can read accurately in 2 4 3 5 4 9 5 3 5 5 5 7 or 5 8 GHz is roughly 20 8 dB This correlates to a VSWR of roughly 1 2 1 Most antenna manufacturers in the license exempt broadband wireless market advertise a VSWR of 1 5 1 Therefore a defective or damaged antenna feed should be evident using the PM 6000 as they will indicate a VSWR higher than 1 5 1 It is possible to measure the VSWR or return loss of a transmission line termination by placing the meter between it and the radio It is necessary to properly terminate the far end termination with the 50 O termination and typically a type double female adapter not included These measurements are often only accurate for the local terminations or the terminations that are physically close to the me ter The two way transmission
11. ut connector the forward and reflected power can be measured If the meter is not properly terminated the forward power measurement may be inaccurate If the signal applied to the meter exceeds the measurement range the meter will display a great than sign gt along with the highest signal level the meter can measure in the selected band VSWR is automatically calculated and displayed according to the for ward and reflected measurements The accuracy of the VSWR meas urement depends on several variables forward and reflected power levels attenuation in the transmission line etc Button Description ON OFF Turns the unit ON or OFF Unit also powers down five minutes after last key depression Powers up to the last state that it was in SELECT Depressing the SELECT button cycles through the op tions available in each mode The arrow points to the selected option Once the desired option has been se lected depress the mode button until the main screen returns MODE First push Displays remaining battery life Second push Allows selection of the unit of power dBm or mW on the display Third push Allows selection of the frequency band of interest Fourth push Allows selection of the inline attenuator offset OdB 10dB 20dB or 30dB Fifth push Exits MODE and returns to selected moni toring state FWD or REFL Page 3 PRAXSYM Depressing FWD or REFL also exits MODE at any time FWD Displays forward
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