Force 2807 PDS Assembly instructions

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© 2006 by Force, Inc. Force reserves the right to make changes to the product described in this document in the interest of product improvement.
Model 2807 PDS/PNS Mini-Node
CATV Receiver
Installation Guide and User Manual
IOM2807
Revision 2.2, March 2006
Laser Safety Warning
The optical emissions from the return path module optical output and connected optical fiber are laser-based
and may present eye hazards. Follow all safety precautions.
Technical Support
If you encounter any kind of problem after reading this manual, contact your local distributor or a Force, Inc.
Applications Engineer. To reach technical support::
On the Web: http://www.forceinc.com
By Phone (Monday through Friday 8:00 am to 5:00 pm EST): USA [phone]
TEL [phone]
By Fax: [phone]
By Email: [e-mail]

Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
IOM2807 Revision 2.2 2
Contents
Laser Safety Warning 1
Technical Support 1
Product Specifications 3
FCC Notice 3
Optical and Video Characteristics 3
Electrical Characteristics 4
Environmental Characteristics 4
Physical Characteristics 4
Specification Notes 4
CNR vs. Receiver Optical Input at 110 Channels 4
Installation and Operation 6
General Installation Instructions 6
Unit Physical Description 7
Model 2807 Mini-node CATV Receiver 7
Module Placement 7
Items Provided 8
Items Required 8
Inspection 8
Connections 8
Operation of the LCD Display 9
Control Button Operation 10
RF Equalization Update Mode 10
RF Attenuation Adjust Mode 11
Optical Status LED 11
Measuring RF Input Levels at the Return Path 11
Safety Precautions 11
Power-up and Operation 11
Performance Verification 12
Troubleshooting 12
Cleaning 13
Warranty and Return Policy 14
Warranty 14
Force Obligations 14
Exclusions 14
Product Return Policy 14
Products Returned for Credit - Non Distributor 15
Products Returned for Repair or Replacement 15
Active Product Under Warranty 15
Obsolete Product Under Warranty 15
Active Out of Warranty 15
Obsolete Product Out of Warranty 16
Receiving an RMA for Returns 16

IOM2807 Revision 2.2 3
Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
Product Specifications
FCC Notice
The Model 2807 has been tested and found to comply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interfer-
ence when the equipment is operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions in this manual,
may cause harmful interference, in which case the user must correct the interference at the user’s own expense.
Compliance with applicable regulations depends on the use of shielded I/O cables. The user is responsible for
procuring the appropriate cables.
Optical and Video Characteristics
@ 25°C, SM Fiber (Note 9) Min. Typ. Max. Units Notes
CATV Receiver
Operating Wavelength 1290 1310 1330 nm
Operating Wavelength 1490 1510 1610 nm
Optical Input Power -8.0 +4.5 dBm
Channel Loading 110 Channels
Bandwidth 50 860 MHz 1
Required Fiber Bandwidth 2,000 MHz
Output Impedance 75 Ohms
RF Output Level +38 dBmV 2
RF Equalization 0+10dB3
Output Return Loss 16 dB
Composite Second Order (CSO) -63 dBc
Composite Triple Beat (CTB) -66 dBc
Carrier-to-Noise Ratio (CNR) See Figure 1 4
Backreflection Tolerance -50 dB 5
Return Path Modules
Operating Wavelength 1280 1310 1340 nm
Operating Wavelength 1490 1550 1610 nm
RF Input Power 23 28 33 dBmV
Optical Power (FP Laser) 1.5 mW
Optical Power (DFB Laser) 3.0 mW
Bandwidth 542MHz

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Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
Electrical Characteristics
Environmental Characteristics
Physical Characteristics
Specification Notes
1) The receiver bandwidth is 50-860 MHz when a return path transmitter is installed.
2) The 2807 Mini-node contains a user-programmable digital RF attenuator which is adjustable from 0 dB to
31 dB attenuation. The user can adjust this RF attenuator to achieve +38 dBmV per channel RF output
over the full rated optical input power. See page 9 for LCD operation details.
3) The 2807 Mini-node contains a user-programmable RF equalization function. The user has the choice of
flat response (no tilt) or +10 dB tilt via the digital control panel. See page 9 for LCD operation details.
4) Figure 1 shows the CNR versus received optical input power and number of channels. The horizontal axis
is the amount of optical light that reaches the receiver. (It is not the loss between the transmitter and
receiver.) The vertical axis shows the CNR.
Figure 1 CNR vs. Receiver Optical Input at 110 Channels
The link CNR is usually specified for a received optical power of -3 dBm or more. Thus, a 2804TK-SCAP/
12 optical transmitter, with an optical output of +12 dBm, will provide excellent performance with up to
15 dB of optical loss at full channel loading. If lower channel loading is used, then the link can operate at
higher optical losses and still provide exceptional CNR.
A number of curves are plotted; the top curve is the typical result when only 5 channels are transmitted
through the link. It can be seen that very high CNR results and in fact the output is quite usable with
receiver optical inputs as low as -12 dBm, corresponding to 24 dB of optical loss! As the channel loading
gets higher, the maximum achievable CNR drops.
Min. Typ. Max. Units Notes
Power Supply Voltage +10 +12 +15 VDC 6
Power Dissipation 10 Watts
Min. Typ. Max. Units Notes
Operating Temperature Range 0+50°C7
Storage Temperature Range -20 +70 °C
Humidity (RH non-condensing) 090%8
Min. Typ. Max. Units Notes
Weight 1.0 lbs.
0.45 kg
Physical Dimensions 8.45 x 2.95 x 1.12 in.
215 x 75 x 29 mm

Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
IOM2807 Revision 2.2 5
5) This product must be used only with APC type optical connectors or fusion spliced connections. There is
some folklore which suggests that the only critical backreflection is the one closest to the transmitter. Our
experience does not support that view. We find that all backreflections matter, regardless of their distance
from the transmitter.
6) The receiver is powered by the Force, Inc. Model PS200 AC adapter. See TB043 for complete specifica-
tions.
7) Most parameters are relatively unaffected by varying temperature. A moving air environment is recom-
mended at ambient temperatures above +35°C.
8) Humidity is RH non-condensing.
9) The Model 2807 PDS/PNS Mini-node receiver is optimized for single-mode operation only.

IOM2807 Revision 2.2 6
Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
Installation and
Operation
General Installation Instructions
The installation of these units is very simple. There are no special unpacking instructions, except that care
should be taken to handle the units gently. Fiber optic links are sensitive electronics devices that should be
handled with care. Like most electronics, they are susceptible to ESD. Proper ESD techniques such as wearing
a wrist grounding strap, should be observed at all times when handling a unit. The units should not be dropped.
No assembly is required.
Do not install the equipment near sources of excessive heat, such as furnace outlets or above heat producing
units, such as large power supplies and tube-type equipment. Observe temperature and relative humidity
requirements specified on page 4.

Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
IOM2807 Revision 2.2 7
Unit Physical Description
Figure 2 Model 2807 Mini-node CATV Receiver
(Dimensions in parentheses are in millimeters.)
Module Placement
Units may be mounted in any orientation on most flat, dry surfaces. Secure panhead screws through mounting
holes provided at the base of the module. If the unit is placed in a location where temperatures may exceed
38°C (100°F), a good heat sink should be secured. The use of silicone thermal pads is recommended between
the module and the plate to maximize heat transfer. Units must have their chassis connected to a good earth
ground.
A. Optical Status (Tri-colored LED): When lit green, indicates the unit
is receiving the optimum optical input power. If the optical power
falls below optimum, the LED will turn yellow. If the optical power
rises above optimum, the LED will turn red.
B. LCD Display: Displays the receiver optical input level, RF attenu-
ator setting, and equalization setting. The RF levels may be ad-
justed by the user via the Up/Down/Select Buttons (items C and
D). See page 9 for details.
C. Up/Down Buttons: Allows the user to adjust the RF attenuator and
equalization settings.
D. Select Button: Selects either RF attenuator or equalization setting
for adjustment.
E. Unit Serial Number: The unit serial number is a code that identifies
the start date of the product warranty.
F. Optical Input (SC/APC std., FC/APC Option): Optical Input to the
receiver.
G. Optical Ouptut (SC/APC std., FC/APC Option): Optional optical
output from the return path module, when installed.
H. Power (4-pin Weidmuller Connector): Supplies power to the re-
ceiver. See page 8 for pin connections.
I. RF Output (F Connector): RF output from the receiver.
J. RF Test -20 dB (F Connector): Allows the user to measure the re-
ceiver RF output levels 20 dB down from the primary output.
K. RF Return Test -20 dB (F Connector): Allows the user to measure
the return path RF signal level 20 dB down from the return path
signal level.
Warning
Invisible laser radiation emitted from the optical output con-
nector and the connector that attaches to the receiver. Avoid
direct eye contact with the beam.

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Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
Items Provided
The following is a list of items provided with each Model 2807:
Items Required
Inspection
Remove the unit from its shipping container. Any in-shipment damage that may have occurred should be visu-
ally apparent. Look for bent or damaged connectors or mounting brackets. Claims for damage incurred in
shipment should be made directly to the transportation company in accordance with their instructions. Save
the shipping cartons until installation and performance verification are completed.
Connections
Qty. Mfr. P/N Description
AR Force, Inc. 2807NX-SFSP PDS/PNS Mini-node CATV Receiver, SM, 1310/1550 nm, SC/
APC Standard, FC/APC Optional
1 per connector Any Any Active Device Receptacle Caps for RF and Optical Connections
Qty. Mfr. P/N Description
AR Force, Inc. 2804T or
2805T
110 Ch. PDS Transmitter, SM, 1310 nm, SC/APC Std, FC option.
77Ch. PNS Transmitter, SM, 1310 nm, SC/APC Std., FC option.
1 per Rx Force, Inc. PS200 Rx Power Supply, +15 Volts, 950 mA DC Power Supply, 4-pin
Power Connector
4 per unit Any Any 6-32 Panhead Mounting Screws with Lock Washers and Nuts
(for Rx)
AR Any Any EIA 19” Grounded Equipment Rack (for Tx)
1 Any Any Straight Screwdriver
AR Any Any 9/125 µm Single-mode Fiber
Connector Name Connector Type Connector Function
Optical Input SC/APC or FC/APC* Optical input to the unit.
Optical Out
SC/APC or FC/APC* Optical output from the return path unit.
It is imperative that backreflections be controlled to very low levels. This product must be used
only with angle physical contact (APC) connectors.
Power 4-Pin Weidmuller Connector
Pin Function
1+12VoltsDC
2Ground
3
Optical Status Flag. This is an open
drain output that can sink up to 10
mA at +12 Volts. An external pull-up
resistor is required. This pin will be
pulled low when the optical input is
within optimal range
4
Optical Input Power Meter. This is an
analog voltage proportional to the
amount of light reaching the detec-
tor. The response is 1 Volt per mW of
input light.
RF Output F Connector RF output from the unit.
RF Test F Connector RF Test (-20 dB) output for receiver.
RF Return Test F Connector RF Test (-20 dB) output for return path module (if installed).
*Note: The FC/APC interface uses the “wide-key” standard. This means that the units are optimized for use with FC/APC
connectors that have a 2.14 mm wide alignment key. “Narrow-key” FC/APC connectors (2.02 mm) may be used but
will produce inferior results. Standard FC/PC connectors have a 2.36 mm wide key and cannot be plugged into to the
unit.

Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
IOM2807 Revision 2.2 9
Operation of the LCD Display
The top of the 2807 Mini-node contains a 16 character x 2 line LCD display with backlight. This LCD is used to
display receiver optical input power, the current status of the internal RF equalizer and the status of the inter-
nal digital RF attenuator. The UP/DOWN/SELECT buttons are used to display and/or configure parameters
for the receiver. A typical display is shown below:
The RF equalizer text (EQ) has two possible states, TILT and FLAT.
The RF attenuator (ATN:) will display values ranging from 0-31 dB, for example:
As the UP button is pushed repeatedly, the attenuation will increase to 31 dB and the display will show MAX as
shown below:
As the DOWN button is pushed repeatedly, the attenuation will decrease to 0 dB and then the display will
show MIN as shown below:
UP
DOWN
SELECT
RF CONTROL AND DISPLAY
EQ:TILT ATN:23dB
OPT IN: -3.2 dBm
UP
UP
DOWN
DOWN
SELECT
SELECT
RF CONTROL AND DISPLAY
RF CONTROL AND DISPLAY
EQ:TILT
ATN:23dB
OPT IN: -3.2 dBm
EQ:FLAT
ATN:23dB
OPT IN: -3.2 dBm
OR
UP
DOWN
SELECT
RF CONTROL AND DISPLAY
EQ:TILT
ATN:23dB
OPT IN: -3.2 dBm
UP
DOWN
SELECT
RF CONTROL AND DISPLAY
EQ:TILT
ATN:MAX
OPT IN: -3.2 dBm
UP
DOWN
SELECT
RF CONTROL AND DISPLAY
EQ:TILT ATN:MIN
OPT IN: -3.2 dBm

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Model 2807 PDS/PNS Mini-node CATV Receiver User Manual
The optical input text (OPT IN:) will show one of the following. If the optical input is greater than + 5.0 dBm,
the display will show OVLD!.
If the optical input is less than -12.0 dBm, the display will show LOW!.
If the light level is greater than or equal to -12.0 dBm and less than or equal to +5.0 dBm, the display will show
the actual input level with a resolution of 0.1 dB and an absolute accuracy of ±0.6 dBm.
When the display select button is pushed 3 times, the display will become that shown below. This is also the
temporary display at power up:
Control Button Operation
When no button has been pushed for 20 seconds or more, the display will revert to idle mode. In idle mode, the
UP and DOWN buttons are ignored. In order to change the setup of the Model 2807 Mini-node, push the
SELECT button. This will cause the unit to enter the equalization update mode. The EQ: text on the display
will flash. Hitting the SELECT button again will cause the unit to enter the attenuation update mode. The
ATN: text on the display will flash. Hitting the SELECT button additional times will cause the unit to toggle
between the equalization update mode and the attenuation update mode. Again, if no button is pressed for 20
seconds or more, the unit will revery to the idle display mode.
RF Equalization Update Mode
When the unit is in the equalization update mode (the EQ: text will be flashing once per second), the UP and
DOWN push buttons will toggle the unit between the FLAT and TILT modes. In FLAT mode, the RF output
will be flat versus frequency (assuming that the RF into the optical transmitter was flat). In the TILT mode,
the RF output will be tilted upward by 10 dB over the full receiver bandwidth (again, assuming that the RF
into the optical transmitter was flat).
UP
DOWN
SELECT
RF CONTROL AND DISPLAY
EQ:TILT ATN:23dB
OPT IN: OVLD!
OVLD!
.
UP
DOWN
SELECT
RF CONTROL AND DISPLAY
FORCE, INC. 2807
Ver.2.03