PM-1500 / LS-1500 Fiber Optic Power Meter and Light Source

PM-1500 / LS-1500
Fiber Optic
Power Meter and Light Source
Operating Instructions
Quality Fiber Optic Test Equipment
Terahertz Technologies Inc. 169 Clear Road, Oriskany, NY 13424
TEL: (315) 736-3642 FAX (315) 736-4078
E-mail sales@terahertztechnologies.com
1/2010
Contents
Introduction...............................................................................................................................1
Specifications...............................................................................................................................2 ,3
Unpacking, Inspection and Power Consideration...............................................................................4
Power Meter Front Panel...................................................................................................5,6,7,8
Power Meter Display...................................................................................................................................9
Power Meter Operation..............................................................................................................10
Store / Recall......................................................................................................................................11, 12
Light Source Front Panel.........................................................................................................13,14
Light Source Display...................................................................................................................15
Light Source Operation.................................................................................................................16,17
Repair Information.............................................................................................18
Warranty Information....................................................................................................19
I
Introduction
The PM-1500 Series Fiber Optic Power Meter and Laser Light Source are convenient hand held
instruments that when paired together allow will make automatic loss measurements at up to three
wavelengths simultaneously. The Power Meter incorporates an InGaAs detector for maximum
sensitivity and stabilty.
The units also functions as a fiber identifier that permits detection of the laser sources at three
frequencies, 270 Hz, 1000 Hz, 2000 Hz. Each instrument is equipped with interchangable adaptors to
accommodate FC, ST or SC connectors.
The PM-1500 Series is powered by a high capacity lithium polymer rechargeable battery that has
a charge life that exceeds 15 hours of operation at full charge. The units may also be powered by
a universal wall mount supply that operates from 95-260 VAC, 50-60 Hz. The wall mount supply is
equipped with mains plugs for North America, Continental Europe, Great Britain and Australia.
The Power Meter stores up to 2000 triple wavelength loss measurements that may be download to a
host computer via a USB port and use of the provided Windows™ compatable application software.
A rugged hard plastic storage/carrying case and a protective rubber boot make this instrument
an excellent choice for outside plant use.
Page 1
Power Meter Specifications
Power Meter Detector Type
InGaAs
Calibrated Wavelengths
850, 1300, 1310, 1490, 1550, 1625 nm
Units of Measurement
dBm, dB,
Resolution
0.01dB
Power Measurement Range
+5 dBm to - 77 dBm (CATV +25dBm to -57dBm)
Power Measurement Uncertainty
± 0.18 dB under reference conditions, ± 0.25 dB from 0 to -65 dBm,
± 0.35 dB from 0 to +5 dBm and from -65 to -77 dBm
Autotest Measurement Rate
Four seconds per wavelength
Autotest Range
0 to - 36 dB
Storage Locations
2000
Battery/Operating Time
Rechargeable Li Polymer/Approximately twenty hours following a full charge
Power Supply / Charger
Universal, US, UK, Continental Europe, and Australian Plugs Included
Power Requirements
95-260 VAC, 50-60 Hz, 3 VA Max
Operating Temperature Range
0 to 5 C
Storage Temperature Range
Equipment -10 to 60C, Battery 0 to 40C
Dimensions (with rubber boot )
5.9” L x 3.9” W x 1.37” H (150mm L x 100mm W x 35mm H)
Weight
10.9 oz. (0.306Kg)
Accessories Provided
FC, ST, SC adaptors, rubber boot, battery, power supply/charger, manual, USB Cable, PC application. Software
Page 2
Light Source Specifications
Laser Output Power
0 dBm, 1 mw
Output Stability
± .05 dB / 24 hrs @ constant temp,, ± .02 dB/C temperature coefficient
Laser Wavelengths Provided
850nm, 1300nm, 1310 nm ± 20 nm, 1490 ± 20 nm, 1550 ± 20 nm
Spectral Width
< 3nm typ.
Modulation Modes
CW, 270 Hz, 1000 Hz, 2000 Hz
Autotest Measurement Rate
Four seconds per wavelength
Laser Safety Classification.
Class I safety per FDA/CDRH and IEC-825-1 regulation
Battery
Rechargeable Li Polymer
Operating Time
Approximately fifteen hours following a full charge
Power Supply / Charger
Universal, US, UK. Continental Europe, and Australian Plugs Included
Power Requirements
95-260 VAC, 50-60 Hz, 3 VA Max
Operating Temperature Range
0 to 40 C
Storage Temperature Range
Equipment -10 to 60C, Battery 0 to 40C
Dimensions (with rubber boot )
5.9” L x 3.9” W x 1.37” H (150mm L x 100mm W x 35mm H)
Weight
0.52 Kg
Accessories Provided
FC, ST, SC adaptors, rubber boot, battery, power supply/Charger, manual
Page 3
Unpacking and Inspection
Prior to shipment this instrument was inspected and found to be free of mechanical and electrical
defects. Upon acceptance by the carrier he assumes responsibility for its safe arrival. After unpacking,
examine the unit for any evidence of shipping damage. Should you receive this instrument in a
damaged condition, apparent or concealed, it must be noted on the freight bill or express receipt and
signed by the carrier’s agent. Failure to do so could result in the carrier refusing to honor the claim.
Upon filing a claim TTI should be notified.
Power Considerations
The PM-1500 Series Power Meters and Light Sources are equippped with a 9 V lithium polymer
rechargeable battery. It will power the unit for approximately 20 hours following a full charge. For
bench top operation, a wall mount power supply/charger is provided. This supply may be operated
from 95 - 260 VAC , 50-60 Hz. Four interchangeable mains plugs are supplied. (North America,
continental Europe, and Australia)
If the supplied battery is discharged in the field and no mains power is available, a 9 V alkaline
or other primary battery may be used temporarily. NOTE: NEVER attempt to use the charger
with any battery other than the one supplied with the unit or severe damage to the instrument
may result!
Page 4
Power Meter
Front Panel
Power, ON/OFF- This control alternately energizes and de-energizes the unit. Auto-Shutdown
mode, in which the unit turns itself off following fifteen minutes without a key press, is the default
mode. This mode conserves the battery should the user forget to turn the unit off. Holding this key
down for at least four seconds at turn-on will de-activate Auto Shutdown.
Power Meter Wavelength Selector- This control selects the calibration factor for the wavelength being measured by the power meter. The progression is as follows: 850 nm  1300 nm
 1310 nm  1490 nm  1550 nm  1625 nm  850 nm, etc. The wavelength is displayed
in the upper right hand corner of the display.
Page 5
Power Meter
Front Panel
Continued
Store Reference Level- This control saves the currently measured power level for the wavelength in use. When in the dB mode, all subsequent readings will be made relative to this power
level. A storage location is maintained for each of the six calibrated wavelengths.
dBm, dB mode Selector- This control alternately switches between comparing the currently
measured power to 1.00 milliwatts (dBm mode) or to the stored reference power level. (dB mode)
When changing to the dB mode, if no reference level has been previously stored, an error tone
will sound and the message “rEF ?” will be displayed for a few seconds. The reference values are
volatile, that is, they are not saved when the unit is powered down.
If you are in dB mode and attempt to select a wavelength that has no stored reference an error
message will appear and the wavelength change will not be accepted until a reference level has
been stored for the new wavelength. Return to the dBm mode and store a reference level for the
new wavelength.
Page 6
Power Meter
Front Panel
Continued
Store Rdg - This control saves the current measurement value(s) to non-volatile memory for
later downloading. This may be a dBm measurement or a dB loss measurement. When the button is activated the memory location is flashed on temporarily. The memory locations will begin
at address 000 and auto increment as each new value is stored. Locations may be skipped if so
desired by invoking the Recall mode and advancing the memory pointer. The next storage location
will increment from this point. Upon filling memory location 1999 no more data may be stored and
the screen will indicate “FULL” even though some locations may have been skipped. The memory
must then be cleared before new data can be stored.
Note: If ERR1 is displayed during a store operation, the power meter has detected that the optical
signal is still settling to its final value. Wait until the signal has stabilized before attempting to save.
Clearing Memory: Be sure to download any desired data before clearing the memory.
Clearing memory is accomplished by holding down the Store Rdg. and Recall Rdg. buttons simultaneously for at least four seconds. Note that the unit must be in the measurement mode and not
in Recall mode. The display will indicate “CLr” while the memory is being erased. The memory
address display will indicate progress of the operation.
Page 7
Power Meter
Front Panel
Continued
Recall Rdg - When pressed, the unit enters Recall Mode which displays a memory location
and the value(s) stored in it. If the memory location is empty, four horizontal lines will appear
in the main display as well as the power meter wavelength display. In this mode the user may
access any memory location by using the up and down controls. Holding one of these buttons
down will cause it to accelerate through the memory locations so that any of the 2000 locations can
be accessed quickly. When a location contains an AutoTest measurement all three loss measurements will be shown in a repeating sequence. An Auto Test measurement will be indicated by the
presence of the Auto Test annunciator on the display without the up or down arrows. To exit the
Recall mode simply press Recall Rdg button again.
To erase only one memory location: Recall the memory location. Simultaneously press the
Store Rdg and the Recall Rdg buttons for at least one second. When the buttons are
released the selected location will have been erased.
Page 8
Power Meter Display
AutoTest Annunciator: When paired with an
LS-1500, if the Light Source is in AutoTest
Mode, the Autotest indicator will display
with a down arrow and the wavelength will
change as the source cycles through available changes.
Power Meter Calibration Wavelength
setting. Will change automatically
when receiving AutoTest signals.
Indicates the battery is low. Unit will
shut down momentarily.
Units of Measurement, dB or dBm
When “Mem” is displayed the numbers that follow indicate the memory location that has been recalled.
If the source of light is modulated at
one of these pulse rates, the appropriate pulse rate will flash.
When this annunciator is on the unit
will automatically shut down following
15 minutes without a key press
Page 9
Power Meter Operation
Optical Power Readings:
Connect the fiber carrying the optical power to be measured to the PM-1500 detector utilizing the adaptor
that mates with the fiber connector style in use. Energize the unit. Select the wavelength calibration factor
that matches the wavelength of the light being measured by pressing the λ key repeatedly until the desired
wavelength setting appears on the display. (Refer to Fig. 2) The power reading will now indicate the optical
power in units of dBm. If the power level is greater than +5 dBm or less than -77 dBm (+25 dBm to -57 dBm for
CATV Versions) the display will indicate an out-of-range condition by a series of dashes across the main display.
Relative Power Readings:
To make a relative power measurement you must first save the reference power level by pressing the Store Ref
button. Then press the dB/dBm button. The units of the display will now change to dB. Subsequent readings will
now be displayed in terms of dB relative to the stored reference value. A reference memory location is provided
for each calibrated wavelength. If the wavelength is changed in dB mode, an error message will occur if no
reference is stored in the next wavelength. These stored reference values will be lost once the unit is turned off.
The Unit will indicate an error if the dB/dBm button is pressed to change to dB if no reference is stored.
Auto Test:
To use the auto test feature, connect your fiber under test to the power meter and the measurements will
cycle through the available wavelengths of the light source. These measurements will be relative to zero dBm
(1mw). Allow the unit to cycle through the available wavelengths before the Store Rdg is pressed. All tested
wavelengths will be stored to one location. Auto Test loss measurement will be displayed as follows: The Auto
Test annunciator will be displayed without the Down arrow. The stored loss values and the wavelength at which
they were measured will be displayed sequentially for a period of 5 seconds each so that they may be copied
down if so desired.
Page 10
Store/Recall
To Store a measurement press Store Rdg button. The Mem: annunciator will flash on briefly and
indicate the memory location to which it is being saved. (Refer to Fig. 2)
To store to a particular location, enter the Recall mode as decribed below and move to the desired
location using the , arrows. Press the Recall Rdg. button again and the unit will now revert back
to the active measurement mode. The next time Store Rdg is pressed, the measurment will be stored
to the location selected.
If the desired position is occupied, the position can be emptied while in the Recall mode by simultaneously pressing the Store Rdg and the Recall Rdg buttons for at least one second. When the buttons
are released the selected location will have been erased.
To recall a memory location press the Recall Rdg button and the unit will enter the recall mode. The
memory location will be displayed and if a value is stored in that memory location the test information
will display. If the memory location is empty, four horizontal lines will appear in the main display as
well as the power meter wavelength display. In this mode the user may access any memory location by using the up and down controls. Holding one of these buttons down will cause it to accelerate
through the memory locations so that any of the 2000 locations can be accessed quickly.
Page 11
Store/Recall
Continued
An Auto Test loss measurement will be displayed as follows: The Auto Test annunciator will be
displayed without the down arrow. The stored loss values and the wavelength at which they were
measured will be displayed sequentially for a period of 5 seconds each so that they may be copied
down if so desired.
To exit the Mem: mode, simply press the Recall Rdg. button again. The unit will now revert back to
the active measurement mode.
To erase one memory location: Recall the memory location. Simultaneously press the Store Rdg and
the Recall Rdg buttons for at least one second. When the buttons are released the selected location
will have been erased.
Clearing Memory: Be sure to download any desired data before clearing the memory.
Clearing memory is accomplished in Measurement Mode Not Recall Mode, by holding down the
Store Rdg. and Recall Rdg. buttons simultaneously for at least four seconds. The display will indicate
“CLr” while the memory is being erased. The memory address display will indicate progress of the
operation.
Page 12
Light Source
Front Panel
Power, ON/OFF- This control alternately energizes and de-energizes the unit. Auto-Shutdown
mode, in which the unit turns itself off following fifteen minutes without a key press, is the default
mode. This mode conserves the battery should the user forget to turn the unit off. Holding this key
down for at least four seconds at turn-on will de-activate Auto Shutdown.
Modulation Selector- This control selects the modulation of the laser source. This feature
permits using the instruments to identify one particular fiber in a cable. The sequence is as follows:
Continuous Wave (CW)  270 Hz,  1000 Hz  2000 Hz  CW. The modulation is a 50 %
duty cycle square wave. An arrow points to the modulation mode selected. When the power meter
detects light modulated at one of these frequencies the associated annunciator will flash.
Page 13
Light Source
Front Panel
Continued
Source Selector - This control selects the laser wavelength to be used. The lasers are initially
turned off when the instrument powers up. Pressing the Source button activates the laser and
changes wavelength in the following sequence: 1310 nm  1490 nm  1550 nm,  Auto Test (in
which the lasers are activated in a sequence of 5 seconds each),  OFF.
When transmitting in Auto Test, the Annunciator will appear at the top of the display with an uppointing arrow. The source wavelength display will automatically change in accordance with the
laser in use. When changing source wavelength in non-Autotest mode, the transmitting unit will
briefly modulate the signal to cause the receiving power meter to change its wavelength setting to
match the transmitted signal. The receiving Autotest arrow will turn on for a short time.
Page 14
Light Source Display
AutoTest Annunciator, Up arrow indicates the
unit is transmitting auto test signals.
Indicates the battery is low. Unit will
shut down momentarily.
Indicates available modulation modes
of light source and an Arrow indicates
which modulation mode is active.
Indicates wavelength being transmitted.
Wavelengths will change every few seconds during Auto Test.
When this annunciator is on the unit will
automatically shut down following 15
minutes without a key press
Page 15
Light Source Operation
The laser source is equipped with interchangeable adaptors that accommodate connection to FC, ST,
and SC style fiber optic connectors. To change adaptors, remove the two Philips head screws that
retain the adaptor, remove the old adaptor, replace it with the desired adaptor, and replace the two
screws.
The lasers are initially in the off state when the unit is powered up. Pressing the Source button
activates the laser and changes wavelength in the following sequence: fist available wavelength, next
wavelength.....  Auto Test (in which the lasers are activated in a sequence of 5 seconds each), 
OFF.
When transmitting in Auto Test, the Annunciator will appear at the top of the display with an up-pointing arrow. The source wavelength display will automatically change in accordance with the laser in use.
In the non-auto test mode the lasers may by used in the CW (continuous mode) or they may be .
Page 16
Light Source Operation
Continued
modulated by a square wave of 270 Hz, 1000 Hz, or 2000 Hz. An arrow next to these values on the
screen indicate the modulation mode in use. Note that when measuring average power of the lasers
the output will drop by exactly 3.01 dB as the source is off precisely half of the time.
(This is also true of the laser output when in the Auto Test mode however the unit receiving this signal
automatically compensates for the loss in average power and this is transparent to the user.)
When switching the source wavelength in the CW mode, the Light Source automatically
communicates to the Power Meter (if it is a TTI 1500 series PM) its wavelength which then changes
its power meter wavelength setting to correspond to the wavelength it is receiving.
The modulation function is useful for fiber identification and for general purpose optical component
testing. The unit that receives one of the modulated frequencies will flash the appropriate frequency
annunciator, that is, 270 Hz, 1000 Hz, or 2000 Hz..
Page 17
Repair Information
REPAIR INFORMATION
Products manufactured by Terahertz Technologies Inc.(TTI) are designed and fabricated to provide
reliable performance. However, in the event that service is required, both telephone technical assistance
and factory repair services are available. Call (315) 736-3642 for information.
For IN-WARRANTY REPAIRS, call us to obtain a Returned Material Authorization number, (RMA
Number). All products are to be returned to TTI with freight charges pre-paid. Those products sent under
warranty will be returned to our customers pre-paid. We cannot be responsible for returned products that
do not reference the TTI RMA number.
For OUT-OF-WARRANTY repairs, services are billable for both time and materials.
Page 18
LIMITED WARRANTY
TERAHERTZ TECHNOLOGIES INC. (“TTI”) WARRANTS THAT TO THE FIRST PURCHASER, FOR A
PERIOD OF TWO YEARS FROM THE DATE OF RECEIPT, THAT THIS PRODUCT (“THE PRODUCT”)
WILL BE FREE FROM DEFECTS IN MATERIALS AND MANUFACTURING. THE FOREGOING
WARRANTY IS THE ONLY WARRANTY, EXPRESS OR IMPLIED, GIVEN BY TTI, I.E., THERE IS NO
WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. TTI HEREBY DISCLAIMS ANY EXPRESS OR
IMPLIED WARRANTY OTHER THAN THE WARRANTY IN THE FIRST SENTENCE TO THE FULLEST
EXTENT PERMITTED BY LAW. THE SOLE AND EXCLUSIVE REMEDY UNDER THIS WARRANTY IS
REPAIR OR REPLACEMENT AT TTI’S OPTION OF ANY PRODUCT THAT PROVES TO BE DEFECTIVE
IN MATERIALS OR MANUFACTURING WITHIN TWO YEARS OF RECEIPT OF THE PRODUCT.
NOTE: THIS WARRANTY DOES NOT APPLY TO ANY PRODUCT WHICH HAS BEEN SUBJECT TO
MISHANDLING, MISUSE, OR SERVICE BY UNAUTHORIZED PERSONNEL OR TO ANY PRODUCT
WHICH HAS BEEN DAMAGED, MODIFIED, ALTERED OR TAMPERED WITH.
TO THE FULLEST EXTENT OF THE LAW, TTI DISCLAIMS ALL LIABILITY FOR ANY OTHER DIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES ALLEGED TO BE CAUSED BY A DEFECTIVE
PRODUCT, I.E., TTI WILL NOT BE RESPONSIBLE FOR ANY PERSONAL INJURY, PROPERTY DAMAGE
OTHER THAN THE COST OF REPLACING THE PRODUCT OR ANY OTHER MONETARY DAMAGE
SUCH AS LOST WAGES OR PROFITS CAUSED BY ANY USE, ATTEMPTED USE OR INABILITY TO USE
THE PRODUCT. NOTE: BY USING THE PRODUCT, YOU AGREE THAT REPAIR OR REPLACEMENT
AT TTI’S OPTION WILL FULLY SATISFY TTI’S WARRANTY OBLIGATION TO YOU, WHETHER IN
CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY OR OTHER APPLICABLE LAW.
Page 19
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